Roles of GML in JPEG 2000 for geographic imagery

Introduction

This clause describes the roles of GMLCOV and GML in JPEG 2000 for geographic imagery. The description of these roles provides the context for the supporting mechanisms described in Clause 7. When encoding information according to one of the types described in this clause the corresponding encoding mechanism specified in Clause 7 should be used.

The role of GMLCOV in relation to JPEG 2000 is to provide an XML encoding of the coverage metadata necessary to make the JPEG 2000 document a georeferenced or geographic image or georefereanceable image. This is accomplished by providing, using the GMLCOV application schema, the description of the image geometry and radiometry. In addition, GML data can be used, as described in this clause, for the encoding of geographic features, annotations, annotation and feature styling, and supporting components for coordinate reference systems and unit of measure definitions.

The GMLCOV and GML data are stored within the JPEG 2000 file using the XML Box mechanisms provided by the JPEG 2000 standard (with Association box as specified by JPX file format in [ISO 15444-2]) and the encodings described in Clause 8.

Use-cases

GMLJP2 is intended to handle a variety of imaging use cases including the following:

1.     Georeferencing of a single image, in which a coverage collection is used to encapsulate GMLCOV elements to describe the geometry and the radiometry of the data. Examples include JPEG 2000 encoding of simple imagery, or JPEG 2000 responses to WMS or WCS requests.

2.     Same as 1, but for multiple images of the same type. A coverage collection is used to encapsulate GMLCOV elements to describe the geometry and the radiometry of the constituent images. Examples include a single JPEG 2000 file that contains stereo photographic pair data, a triangulation block of images, or a collection of image tiles making up an image mosaic.

3.     Same as 2, but for images of different types. A coverage collection is used to encapsulate GMLCOV elements to describe the geometry and the radiometry of the constituent images. Examples include a single JPEG 2000 file that contains a combination of images relating to the identification of a target and its environs, such an optical image, a FLIR dataset, and one or more SAR images.

4.     Rectified images with or without associated digital elevation models. GMLCOV can be used to provide the geometry and, optionally, elevation information.

5.     Images that correspond to elevation grid and associated metadata

6.     Images that require annotations, such as for explanatory text or simple vector graphics to communicate additional information about what the image is portraying.

7.     Images that are required to be accompanied by arbitrary feature data. The GML can be used to describe the features.  An example of this would be a single GMLJP2 file in substitution to the use of a pair of files such as a GeoTIFF and a Shapefile.

8.     Same as 1, but with additional coverage provided to indicate the semantic meaning of specific pixel (sample) values, e.g. for “no-data” or high-saturation indicators.

9.     Images that require an associated sensor model for analysis and geopositioning.  SensorML describes all processes and components in GML.

10.  Images that require associated access rights. GeoXACML is a general purpose language to declare and enforce access control rights, e.g. a condition where the user can access all features inside or outside a particular geographical area.

11.  Multiple codestream encoding enables multiple images of the same or different type (different geometry, different radiometry) to be packaged in a single JPEG 2000 file. Multiple ASOC boxes within the “outer” association box labeled gml.data may refer to the different codestreams, e,g., pressure, ozone as separate codestreams with associated schemas.

12.  Images coming out from radar sensors (after SLC)

13.  Large mosaic dataset tested (>10GB up to 40 GB in one single GMLJP2 file).

JPEG2000 Coverage description requirements (core)

Section 7 and 8 describe the use of the GMLCOV to describe both a coverage collection and the individual coverages for its usage in a JPEG2000 encoding format. A Coverage collection is needed because a GMLJP2 file (dataset) may contain:

A single codestream (raster) associated with a single coverage with a XML encoding of the metadata necessary to make the JPEG2000 document a georeferenced or geographic image (Minimum Use Case).

A sequence (collection) of codestreams with a sequence of corresponding coverages

A single codestream associated with a single coverage, and associated features and annotations, together with styling information.

A sequence (collection) of codestreams with a sequence of corresponding coverages, each coverage being associated with its features and annotations, together with styling information.

Geographic metadata may be associated to the coverage collection (the whole GMLJP2 file). This metadata is at the “aggregate” level, aggregate here being any structure of elements corresponding to cases 2 to 4.

The result is a GML document providing the information of the coverage(s) and associated features, annotations and styling (if any).

Section 7 describes some particularities in the use of GMLCOV to encode different aspects of the data and Section 8 describes the complete structure of a GMLJP2 XML encoding.

Requirements class gmljp2 establishes how a coverages representation, metadata, GML features and annotations can be embedded in the JPEG2000 encoding format. Its identifying URL is given by http://www.opengis.net/spec/gmljp2/2.0/req.

This sta  

ndard rely on OGC 09-146r2, GML Application Schema – Coverages Encoding Specification version 1.0.1. (May 2012) and OGC 12-108, GML Application Schema - Coverages - JPEG2000 Coverage Encoding Extension for what concern:

· gmljp2:GMLJP2GridCoverage,

· gmljp2:GMLJP2RectifiedGridCoverage,

· gmljp2: GMLJP2ReferenceableGridCoverage

Informative:

The ReferenceableGridCoverage is also handled by the GMLCOV specification but because the usage of GML 3.3 it will be specified in the GMLJP2 extensions.

Coverage metadata

This clause describes the use of GMLCOV to encode data about such geographic images. This approach considers three different types of such “metadata”:

1.     “Traditional” metadata, e.g. ISO 19139 [2], in Earth Observation profile, etc

2.     GMLCOV information, from the GML Coverage

3.     Image information, from the JPEG 2000 image header

Some metadata can be at the coverage collection level and some other at the coverage level. Some metadata origins can be redundant and the requirements provided here specify precedence.

At the coverage collection level, the JPEG 2000 header metadata provides information about the number of codestreams. At the individual coverage level, JPEG 2000 header metadata provides information about the number of rows and columns, the number of resolution levels and eventually an internal tiling schema. GMLCov provides a metadata property, gmlcov:metadata which can be attached to any GMLCov object and will be used to encode metadata about the coverage. The GML metadata property, gml:metaDataProperty, can be attached to any GML object and it is only intended for metadata about extra elements that the GMLJP2 encodes such as GML features or annotations.

Both gmlcov:metadata and gml:metaDataProperty can either point (via xlink:href) to a metadata property package expressed via a GML metadata application schema, or enclose a bundle of such metadata properties in-line. This can be an ISO19139 document, an EOP XML description or a custom supported, user-defined metadata schema. Some elements can be redundant in more than one description. It is the responsibility of the data provider to avoid redundant information, and if coverage metadata provides redundant information the data provider is responsible to ensure that it is consistent with the coverage descriptions provided in GMLCOV or the JPEG2000 headers.

Note:   gmlcov:metadata gml:metaDataProperty is intended for metadata about extra GML features, annotations etc.

It is possible to include metadata in the coverage information in several formats. One possibility is to use ebRIM:RegistryObject as the first class element. Another is to include an ISO19139 metadata description in XML. Table 2 summarizes the different alternatives that are directly possible using the XML schema provided (see annex D for examples.

The following instance illustrates how to do it for the ISO19115/19139

<?xml version=“1.0” encoding=“UTF-8”?>
<gmljp2:GMLJP2CoverageCollection gml:id="JPEG2000_0">
  <gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="CodeStream0">
   …
     <gmlcov:metadata>
      <gmljp2:Metadata>
        <gmljp2:isoMetadata>
         <gmd:MD_Metadata>
           <gmd:fileIdentifier/>
           <gmd:characterSet/>
           <gmd:parentIdentifier/>
           <gmd:hierarchyLevelName/>
           <gmd:contact/>
           <gmd:dateStamp/>
           <gmd:identificationInfo>
            <gmd:MD_DataIdentification>
              <gmd:citation>
               <gmd:CI_Citation>
                 <gmd:title/>
                 <gmd:alternateTitle/>
              <gmd:date/>
               </gmd:CI_Citation>
              </gmd:citation>
              <gmd:abstract/>
              <gmd:resourceFormat/>
              <gmd:language/>
              <gmd:extent>
               <gmd:EX_Extent/>
              </gmd:extent>
            </gmd:MD_DataIdentification>
           </gmd:identificationInfo>
         </gmd:MD_Metadata>
        </gmljp2:isoMetadata>
      </gmljp2:Metadata>
     </gmlcov:metadata>
   </gmljp2:GMLJP2RectifiedGridCoverage>
  </gmljp2:featureMember>
</gmljp2:GMLJP2CoverageCollection>

Earth Observation data products are generally managed within logical collections that are usually structured to contain data items derived from sensors onboard a satellite or series of satellites. The key characteristics differentiating products within the collections are date of acquisition, location as well as characteristics depending on the type of sensor. For example, key characteristics for optical imagery are the possible presence of cloud, haze, smokes or other atmospheric or on ground phenomena obscuring the image.

The common metadata used to distinguish Earth Observation (EO) products types are presented in this document for generic and thematic EO products (i.e. optical, radar, atmospheric, altimetry, limb-looking and synthesis and systematic products). This can be done with the Earth Observation profile metadata.

The following XML illustrates how to do it:

<?xml version=“1.0” encoding=“UTF-8”?>
<gmljp2:GMLJP2CoverageCollection gml:id="JPEG2000_0">
  <gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="CodeStream0">
     <gmlcov:metadata>
      <gmljp2:Metadata>
        <gmljp2:eopMetadata>
         <eop:EarthObservation
xmlns:eop="http://www.opengis.net/eop/2.0"
             xmlns:om="http://www.opengis.net/om/2.0" gml:id="ID_EOP_1">
           <om:phenomenonTime/>
           <om:resultTime/>
           <om:procedure/>
           <om:observedProperty xlink:href="#params1"
xmlns:xlink="http://www.w3.org/1999/xlink"/>
           <om:featureOfInterest/>
           <om:result/>
           <eop:metaDataProperty>
            <eop:EarthObservationMetaData>
              <eop:identifier/>
              <eop:acquisitionType>CALIBRATION</eop:acquisitionType>
              <eop:acquisitionSubType/><eop:status>ACQUIRED</eop:status>
            </eop:EarthObservationMetaData>
           </eop:metaDataProperty>
         </eop:EarthObservation>
        </gmljp2:eopMetadata>
      </gmljp2:Metadata>
     </gmlcov:metadata>
   </gmljp2:GMLJP2RectifiedGridCoverage>
lt;/gmljp2:featureMember>
</gmljp2:GMLJP2CoverageCollection>

Annex D provides more examples of how metadata (including ISO19115 and Earth Observation Profile) can be embedded in a XML file.

Image annotation

An image annotation can be defined as an association between an annotation entity (e.g. a text label) and an image or some geometric “region” within the image. Annotations can be provided in image coordinates (pixels) in CRS coordinates defined by the GMLCOV reference part (e.g. GML), in a common reference system such as WGS84 (e.g. KML) or in pixel coordinates.

Annotations provide an association between geometric “regions” (0-d, 1-d, 2-d, etc.) in an image and annotation text, imagery, video and feature references. Annotations are deeply linked to styles for visual presentation. An annotation can be thought of as drawing attention to some “region” of an image.

See section 11 for a more complete reference to annotation approaches

Geographic features

Geographic features, e.g. features obtained from an image by image interpretation, can be packaged inside the JPEG 2000 image. Such features may be directly associated with a particular image in the JPEG 2000 file or may be independent of the image altogether.

Geographic features included in a JPEG2000 encoded image using GMLJP2 will be encoded as GML features 3.2 and comply with the rules for GML application schemas as defined in Clause 21 of the OGC 07-036 GML 3.2.1 standard. Encoding of features requires an associated GML application schema.

Feature styling

Geographic features in GML express geographic content. Visual presentation of such geographic features requires a styling mechanism to interpret and transform the GML features into graphical objects (e.g. SVG or KML).

For example, styling rules can be expressed using the following approaches:

•   OGC Styled Layer Descriptors / Symbology Encoding

•   GML default styling

•   KML fragments

Coordinate reference systems

Coverage geometries, the geometric properties of GML features and annotations include coordinates which are interpreted within the context of a coordinate reference system (CRS). According to the rules of GML, the coordinate reference system is specified via URI. This URI may identify the CRS by reference to an authority and an authority maintained code. Alternatively, these URI may identify the physical location of a CRS definition.

References to Coordinate Reference Systems (CRS) may take one of the following forms:

•   Reference to an authority and authority maintained code OGC 07-092r3 and in http://www.opengis.net/def. (Some of them are also defined in http://schemas.opengis.net/definitions/1.1.0/)

•   Reference to CRS definition

In those cases where an actual CRS definition is required, GML provides a grammar for encoding such coordinate reference systems. The coordinate reference system definitions encoded in GML can then be packaged with the JPEG 2000 data (as for features etc.) and referenced from the coverage description or features or can exist externally. This enables both network-centric and standalone implementations of GML and JPEG 2000 to be deployed.

Some coordinate reference systems may require use of a GML coordinate reference system application schema. Mechanisms for referencing and/or transporting GML application schemas are discussed in Clause 9.

Note:   GMLJP2 follows the definition of grids in GML 3.2.1 [OGC 07-036] clause 19.2.2:  “When a grid point is used to represent a sample space (e.g. image pixel), the grid point represents the center of the sample space (see ISO 19123:2005, 8.2.2)”. This corresponds with the pixelInCell value of ImageCRS set to CellCenter as specified in ISO 19111. This can be interpreted as the origin of the RectifiedGrid is the centre point of the corner pixel.

Units of measure

Coverage values, properties of GML features and annotations may employ references to units of measure (UoM). According to the rules of GML references to Units of Measure may take one of the following forms:

Reference to an authority and authority maintained code OGC 07-092r3 and in http://www.opengis.net/def. (Some of them are also defined in http://schemas.opengis.net/definitions/1.1.0/)

Reference to UOM definition

Coverage value units are defined in gmlcov:rangeType/swe:DataRecord/swe:uom.

Informatively, the definitions of some units of measure and the equivalent URIs are listed in Table 3. Many units can be also specified using EPSG URIs.

The use opengis-URI of UCUM codes are preferred or recommended.

Units of Measure definitions may be optionally included as dictionary entries in an XML box (see Clause 8.) within the JPEG 2000 file. In those cases where an actual UOM definition is required, GML provides a grammar for the encoding of such units of measure. The units of measure definitions encoded in GML can then be packaged with the JPEG 2000 data (as for features etc.) and referenced from the coverage description or features or can exist externally. This enables both network-centric and standalone implementations of GML and JPEG 2000 to be deployed. Mechanisms for referencing and/or transporting GML application schemas are discussed in Clause 10.

Nil values

It is often useful to be able to specify the semantic intent for sample values in the imagery, such as for “nodata” pixels or samples (nil values) whose values that were invalid, or not acquired or were clipped due to high or low saturation. Possible reasons for NIL values can be seen in table 4 and some of them are defined in OGC 07-036 section 8.2.3.1.

It is the client’s job to interpret such special values; this standard does not require that a client be able to interpret those values.  Informatively, the definitions of some reasons and the equivalent URIs are listed in Table 4.

Encoding rules for GML in JPEG 2000 (core)

Introduction

This section specifies the requirements that shall be followed when encoding XML data for use within JPEG 2000 files. The primary role of GML in relation to JPEG 2000 is to make the latter into a geographic image. This is accomplished by providing GMLCOV description of the image geometry (DomainSet) and radiometry (RangeType). In addition, GML data can be used, as described in this clause, for the encoding of metadata, geographic features, annotations, annotation and feature styling, and supporting components for coordinate reference systems and unit of measure definitions.

Child elements of GMLJP2CoverageCollection are described in the following section and in Tables 5 to 6. The structure of the GMLJP2 document is represented as a UML diagram in the Annex B.

Note: It is strongly recommended to use the GML xlink.href mechanism to link to big GML document instead of embedding the data inline.

Future extensions of this standard may define concrete GML application schemas to describe features for specific applications.

Future extensions of this standard may define specific encoding for transporting annotations for specific applications. See section 11

For example, the gmljp2:style element can include an SLD as a style layer description that describes styles of the gmljp2:feature element.

Extensions of this standard can define other sections in the gmljp2:GMLJP2CoverageType in the future.

A specific schema defining the gmljp2 is provided in this standard that includes GMLCOV 1.0, GML 3.2, ISO metadata, DC metadata and EOP metadata. The GMLCOV description is the first part of the XML document.

All child elements in the gmljp2:GMLJP2CoverageType are derived from gml:AssociationAttributeGroup and can be described in-line or by referencing other elements of the same XML or from different XML using xlink.href.

The following example shows the GMLJP2CoverageCollection root element that this standard introduces as a way to include the mandatory coverage subelement (using GMLCOV; in this case a GMLJP2RectifiedGridCoverage is used) which also allows for metadata (where we can include or reference a metadata element or a complete metadata description), and an optional features (where we can include or reference a feature collection).

<gmljp2:GMLJP2CoverageCollection gml:id="JPEG2000_0" xsi:schemaLocation="http://www.opengis.net/gmljp2/2.0 gmlJP2.xsd"
xmlns:gml="http://www.opengis.net/gml/3.2"
xmlns:gmlcov="http://www.opengis.net/gmlcov/1.0"
xmlns:gmljp2="http://www.opengis.net/gmljp2/2.0"
xmlns:gmd="http://www.isotc211.org/2005/gmd"
xmlns:gco="http://www.isotc211.org/2005/gco"
xmlns:swe="http://www.opengis.net/swe/2.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <gml:gridDomain/>
  <gml:rangeSet>
   <gml:File>
       <gml:rangeParameters/>
     <gml:fileName>gmljp2://codestream/0</gml:fileName>
     <gml:fileStructure>inapplicable</gml:fileStructure>
   </gml:File>
  </gml:rangeSet>
  <gmlcov:rangeType/>
  <gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="ID_1">
   <gml:boundedBy>
     <gml:Envelope srsName="http://www.opengis.net/def/crs/EPSG/0/4326"
axisLabels="Lat Long" uomLabels="deg deg" srsDimension="2">
      <gml:lowerCorner>9.9 9.9</gml:lowerCorner>
      <gml:upperCorner>14.9 12.9</gml:upperCorner>
     </gml:Envelope>
   </gml:boundedBy>
   <gml:domainSet>
      <gml:RectifiedGrid gml:id="rg0001_C0002" dimension="2"
            srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
        <gml:limits>
         <gml:GridEnvelope>
           <gml:low>1 1</gml:low>
           <gml:high>3 10</gml:high>
         </gml:GridEnvelope>
        </gml:limits>
        <gml:axisLabels>Lat Long</gml:axisLabels>
        <gml:origin>
         <gml:Point gml:id="P0001"
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
           <gml:pos>9.9 9.9</gml:pos>
         </gml:Point>
        </gml:origin>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">0 3.71e-005
        </gml:offsetVector>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">-3.71e-005 0
        </gml:offsetVector>
      </gml:RectifiedGrid>
     </gml:domainSet>
     <gml:rangeSet>
      <gml:File>
        <gml:rangeParameters/>
        <gml:fileName>gmljp2://codestream/0</gml:fileName>
        <gml:fileStructure>inapplicable</gml:fileStructure>
      </gml:File>
     </gml:rangeSet>
     <gmlcov:rangeType/>
     <gmlcov:metadata>
      <gmljp2:Metadata>
        <gmljp2:isoMetadata>
      <gmd:MD_Metadata>
           <gmd:fileIdentifier/>
           <gmd:characterSet/>
           <gmd:parentIdentifier/>
           <gmd:hierarchyLevelName/>
           <gmd:contact/>
           <gmd:dateStamp/>
           <gmd:identificationInfo>
            <gmd:MD_DataIdentification>
              <gmd:citation>
               <gmd:CI_Citation>
               <gmd:title/>
               <gmd:alternateTitle/>
               <gmd:date/>
              </gmd:CI_Citation>
              </gmd:citation>
              <gmd:abstract/>
              <gmd:resourceFormat/>
              <gmd:language/>
              <gmd:extent>
               <gmd:EX_Extent/>
              </gmd:extent>
            </gmd:MD_DataIdentification>
           </gmd:identificationInfo>
         </gmd:MD_Metadata>
        </gmljp2:isoMetadata>
      </gmljp2:Metadata>
     </gmlcov:metadata>
   </gmljp2:GMLJP2RectifiedGridCoverage>
  </gmljp2:featureMember>
   <gmljp2:featureMember>
   <gmljp2:GMLJP2Features gml:id="ID_FE_2">
     <gmljp2:feature>
      <gml:FeatureCollection gml:id="ID_07">
        <gml:featureMember>
         <gml:Observation gml:id="ID_08">
           <gml:validTime/>
           <gml:resultOf/>
         </gml:Observation>
        </gml:featureMember>
      </gml:FeatureCollection>
     </gmljp2:feature>
   </gmljp2:GMLJP2Features>
  </gmljp2:featureMember>
</gmljp2:GMLJP2CoverageCollection>

GMLCOV for JPEG2000

GMLCOV defines the associated JPEG 2000 file as a geographic 2D coverage.

Such coverage descriptions are based directly on the GMLCOV namespace gmlcov and do not require to define a specific application schema for each JPEG 2000 instance. There can be only ONE element of the gmlcov:AbstractCoverageType per codestream even though the GMLCOV element can describe more than one field (band) if the codestream also describes more than one filed or band. Clause 9 provides details on the mapping of coverage description instances and codestreams in the multiple codestream case.

The following sketches a valid GMLCOV XML file that describes a single field (one band) embedded in a JPEG2000 XML box. Please note the use of fileName and fileStructure:

<gmljp2:GMLJP2CoverageCollection gml:id="JPEG2000_0"
     xmlns:gml="http://www.opengis.net/gml/3.2"
     xmlns:gmlcov="http://www.opengis.net/gmlcov/1.0"
     xmlns:gmljp2="http://www.opengis.net/gmljp2/2.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://www.opengis.net/gmljp2/2.0 gmlJP2.xsd">
  <gml:gridDomain/>
  <gml:rangeSet>
   <gml:File>
       <gml:rangeParameters/>
     <gml:fileName>gmljp2://codestream/0</gml:fileName>
     <gml:fileStructure>inapplicable</gml:fileStructure>
   </gml:File>
  </gml:rangeSet>
  <gmlcov:rangeType/>
  <gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="ID_1">
     <gml:boundedBy>
      <gml:Null>withheld</gml:Null>
     </gml:boundedBy>
     <gml:domainSet>
      <gml:RectifiedGrid gml:id="rg0001_C0002" dimension="2"
            srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
        <gml:limits>
         <gml:GridEnvelope>
           <gml:low>0 0</gml:low>
           <gml:high>6208 3103</gml:high>
         </gml:GridEnvelope>
        </gml:limits>
        <gml:axisLabels>Lat Long</gml:axisLabels>
        <gml:origin>
         <gml:Point gml:id="P0001"
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
           <gml:pos>41.4756576954751 2.04345415526392</gml:pos>
         </gml:Point>
        </gml:origin>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">0 3.71e-005</gml:offsetVector>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">-3.71e-005 0</gml:offsetVector>
      </gml:RectifiedGrid>
     </gml:domainSet>
     <gml:rangeSet>
      <gml:File>
        <gml:rangeParameters/>
        <gml:fileName>gmljp2://codestream/0</gml:fileName>
        <gml:fileStructure>inapplicable</gml:fileStructure>
      </gml:File>
     </gml:rangeSet>
     <gml:coverageFunction>
      <gml:MappingRule/>
     </gml:coverageFunction>
     <gmlcov:rangeType/>
    </gmljp2:GMLJP2RectifiedGridCoverage>
  </gmljp2:featureMember>
</gmljp2:GMLJP2CoverageCollection>

Packaging GML in JPEG 2000 (core)

Introduction

This clause describes the mechanisms for packaging coverage information data and eventual GML application schemas inside JPEG 2000 data files. It also provides rules for encoding references between GML instances and GML application schemas, and between GML instances. Finally it provides the rules for associating coverage descriptions (see Clauses 6 and 7) and JPEG 2000 codestreams.

Use of JPEG 2000 boxes

The JPEG 2000 file format is defined as a contiguous set of boxes, where a box is defined as an abstract data structure used to hold arbitrary data. Different types of boxes are defined to contain different kinds of data: for example, the codestream and XML box types are used to contain, respectively, wavelet-encoded image data and XML data.  Additionally, certain types of boxes known as super-boxes may contain other boxes.

This standard requires the use of three types of boxes in order to store and reference GML data in the JPEG 2000 file.

•   The ASOC (Association) super-box contains at least two child boxes and is used to declare a relationship between the first child box and the remaining children.

•   The LBL (Label) box is used to contain a short string, typically serving as an identifier.

•   The XML box is used to contain XML data, e.g. GMLJP2 instances.

All GML instance, schema, and dictionary data is stored in XML boxes or will be linked to external files. An example JPEG 2000 file with an association box structure is shown in Figure 4.

For convenience, M6.2 de 15444-2 is repeated here:

- M.6.2 Expression representation

The expressions of the requirements to fully understand all aspects, and to display the file as desired are stored in the Reader Requirements box, which is a mandatory feature of a JPX file format. If the Reader Requirements box is not present, the File Type box describes the full functionality of the file.

- in Table M.13. The Reader Requirement Box is identified as Required.

•   (however) in case of absence, “If the Reader Requirements box is not present, the File Type box describes the full functionality of the file.”

•   use of  “Brand field in File type box”  :  The brand field shall always be “jpx\040” for JPX files.

According to Clause 3.2 of [ISO N2887], the presence of GML data in a JPX file be signaled using the Reader Requirements box (defined in Annex M of [ISO 15444-2]) with a value of 67 (XMLGISMetaData) as the SF (standard flag) in paragraph M.11.1, meaning that the file contains GML data based on the OGC standard. The data is then packaged in XML data which is annotated with JPX labels, where the annotation works via the “association” (ASOC) box of part 2. The topmost ASOC box will contain a LBL box whose content is “gml.data”, and several additional ASOC boxes of which each of them contains a LBL box giving a name to the data, and an XML box containing the actual GML payload data.

The Reader Requirements Box should respect the required fields structure as defined in the ISO 15444-2 standard. The FUAM field should be correctly set to interpret the standard flag value for the GML content.

Use of JPEG 2000 Part I and Part II extensions

It is recommended to use the JPEG2000 Part I (ISO 15444-1) that is widely implemented and defines the core JPEG 2000 and that includes the syntax of the JPEG 2000 codestream.

Because the association and label boxes are defined by Part II of the JPEG 2000 standard, all GMLJP2 files SHALL implement the JPX file format as defined in [ISO 15444-2], to the extent required to support those box types.

NOTE:    These two box types are the only Part II extensions used by the GMLJP2 standard.

Note:   In order to promote interoperability and support by JPX reader, it is highly recommended to only use the baseline set of JPX features, and to signal this compliance to JPX baseline with the value ‘jpxb’ (0x6a70 7862) in the compatibility list of the File Type box (see Annex M.9.2 of [ISO 15444-2]).

Note:   GML instance data can be composed by a coverage description, metadata instances, annotation instances and feature instances and future extended elements.

The minimal structure case for the XML box packaging for a single codestream and for a multiple codestream is the same as shown in figure 6.

XML schemas, CRS dictionaries or units of measure dictionaries can be stored as external XML files and referenced form the GMLJP2 file. In case that there is a need for storing them in the file, any number of association boxes may follow the gml.root-instance box as containers for them.

This label is used in references to the XML box content using the mechanism described in Clause 10.6.

Note: the above boxes can also be stored as external XML files and referenced from the GMLJP2 file.

XML references in a JPEG2000 package (core)

This clause describes the GMLJP2 URI syntax, a URI structure for references to schemas (xsi:schemaLocation) and instance elements or dictionary instance boxes, other XML data, or non-XML data through the use of URI references, e.g. xlink:href, gml:uom, gml:srsName, gml:resultOf.  These can reside either externally or within the JPEG 2000 file. GMLJP2 URIs are required for ALL references.

References to XML schemas

GML instance data may reference a supporting XML schema (specifically, a GML application schema) through the XML schema location attribute (xsi:schemaLocation) whose value is a list of URI pairs (namespace, schemaLocation). 

This standard has been crafted in a way that common uses (such as geographical georeferencing or including ISO metadata) do not require creating a specific application schema for each JPEG2000 instance and just using elements from the general schemas and referencing the general schemas could be enough. Nevertheless, it is possible that you need to define own GML feature types and feature collections or you own metadata schema. In this case, the specific application schema can be accessible in the web or can be included in a different XML box.

For convenience these rules are repeated here:

Given a namespace name (or none) and (optionally) a URI reference from xsi:schemaLocation or xsi:noNamespaceSchemaLocation, schema-aware processors may implement any combination of the following strategies, in any order:

1.     Do nothing, for instance because a schema containing components for the given namespace name is already known to be available, or because it is known in advance that no efforts to locate schema documents will be successful (for example in embedded systems);

2.     Based on the location URI, identify an existing schema document, either as a resource which is an XML document or a <schema> element information item, in some local schema repository;

3.     Based on the namespace name, identify an existing schema document, either as a resource which is an XML document or a <schema> element information item, in some local schema repository;

4.     Attempt to resolve the location URI, to locate a resource on the web which is or contains or references a <schema> element;

5.     Attempt to resolve the namespace name to locate such a resource.

Whenever possible, configuration and/or invocation options for selecting and/or ordering the implemented strategies should be provided.

External references

References to external application schemas are possible and recommended for the common general schemas.

Note that the relative reference meaning has been changed from the previous version of this standard. Where (in the previous version) the reference to the schemaLocation was done by URI using the GMLJP2 URI convention, with such references referring to schemas within the JPEG 2000 file.

Internal references within a JPEG2000 file.

where

•gmljp2 is the URI scheme

•resource.type is one of the following:

•   xml codestream values for resource.id depend upon the value of resource.type, as explained below.

•values for fragment-identifier depend on the value of resource.type

Internal references to XML boxes within a JPEG2000 file

where [label] identifies a labeled XML box within the gml.data box, and [id] is a GML id of an element inside the XML. If [id] is omitted, then the URI refers to the entire XML document.

Dependencies: /req/internal-references

Note that label text is arbitrary and is constrained only by the syntactical restrictions of the URI [IETF 2396] and of the label box in JPEG 2000 [ISO 15444-2].

GML instance documents may use URIs of this form to import schema, dictionary entries, or other XML data stored in the gml.data box.

EXAMPLE 1 gmljp2://xml/myschema.xsd

Identifies a schema in the XML box labelled myschema.xsd.

EXAMPLE 2 gmljp2://xml/uom.xml

Identifies a UOM dictionary in the XML box labelled uom.xml.

EXAMPLE 3 gmljp2://xml/uom.xml#meter

Identifies the meter entry in the UOM dictionary in the XML box labelled uom.xml.

Note that instances, e.g. GML elements, can only be referenced within labeled boxes.

This is an example of a notation that follows the above requirements:

<gmljp2:GMLJP2CoverageCollection gml:id="JPEG2000_0"
     xmlns:gml="http://www.opengis.net/gml/3.2"
     xmlns:gmlcov="http://www.opengis.net/gmlcov/1.0"
     xmlns:gmljp2="http://www.opengis.net/gmljp2/2.0"
     xmlns:swe="http://www.opengis.net/swe/2.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://www.opengis.net/gmljp2/2.0 gmlJP2.xsd">
  <gml:gridDomain/>
  <gml:rangeSet>
   <gml:File>
       <gml:rangeParameters/>
     <gml:fileName>gmljp2://codestream/0</gml:fileName>
     <gml:fileStructure>inapplicable</gml:fileStructure>
   </gml:File>
  </gml:rangeSet>
  <gmlcov:rangeType/>
  <gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="ID_1">
     <gml:domainSet>
       <gml:RectifiedGrid gml:id="rg0001_C0002" dimension="2"
            srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
        <gml:limits>
         <gml:GridEnvelope>
           <gml:low>0 0</gml:low>
           <gml:high>6731 8983</gml:high>
         </gml:GridEnvelope>
        </gml:limits>
        <gml:axisLabels>Lat Long</gml:axisLabels>
        <gml:origin>
         <gml:Point gml:id="P0001"
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
           <gml:pos>41.4756576954751 2.04345415526392</gml:pos>
         </gml:Point>
        </gml:origin>
<gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326" >0 3.71e005</gml:offsetVector>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">-3.71e-005 0</gml:offsetVector>
      </gml:RectifiedGrid>
     </gml:domainSet>
     <gml:rangeSet>
      <gml:File>
        <gml:rangeParameters/>
        <gml:fileName>gmljp2://codestream/0</gml:fileName>
        <gml:fileStructure>inapplicable</gml:fileStructure>
      </gml:File>
     </gml:rangeSet>
     <gmlcov:rangeType/>
     <gmljp2:feature>
      <my_srf:RoadCollection gml:id="ID_ROADS"     xmlns:my_srf=" http://www.bob.bob/example1"
  xsi:schemaLocation="http://www.bob.bob/example1 gmljpg2://xml/SpringRoadField.xsd">
        <my_srf:road>
         <my_srf:Road gml:id="ID_ROAD">
           <my_srf:position>
            <gml:LineString  gml:id="ID_LINEROAD">
              <gml:pos>1 1</gml:pos>
              <gml:pos>2 9</gml:pos>
            </gml:LineString>
           </my_srf:position>
           <my_srf:width>4.1</my_srf:width>
        <my_srf:name>M30</my_srf:name>
         </my_srf:Road>
        </my_srf:road>
      </my_srf:RoadCollection>
     </gmljp2:feature>
   </gmljp2:GMLJP2RectifiedGridCoverage>
  </gmljp2:featureMember>
</gmljp2:GMLJP2CoverageCollection>

Internal references to codestream within a JPEG2000 file

where [codestream-number] is an integer, greater than or equal to 0, that identifies a particular codestream in the JPEG 2000 file.  By convention, codestreams are to be numbered in lexical order of their appearance in the file.

GML instance documents may use URIs of this form to refer to particular codestreams in the file.

EXAMPLE 1 gmljp2://codestream/0

Identifies the first codestream in the file.

EXAMPLE 2 gmljp2://codestream/1

Identifies the second codestream in the file.

NOTE:  Care must be taken to preserve the integrity of such numerical codestream references when restructuring or rewriting the JPEG 2000 file in such a way that codestreams could get added, removed, or reordered; in other words, the codestream IDs are always in a strictly increasing order starting from 0.

Codestream references

Single codestream case

A single JPEG 2000 codestream is used to represent a single geographic 2D coverage. The GML data (instance data, schemas) associated within this codestream are contained in an association box as discussed in the next clause.

Minimal instance example for a single codestream

The GML data at the minimum, consists of a root gmljp2:JPEG2000Coverage which is a member of a codestream-specific coverage information, which in turn contains a GMLCOV gmlcov:AbstractCoverage member. This simple RectifiedGridCoverage example given below demonstrates the GMLCOV portion of the encoding of a georectified image as a GMLCOV coverage.

 

<gmljp2:GMLJP2CoverageCollection gml:id="JPEG2000_0"
     xmlns:gml="http://www.opengis.net/gml/3.2"
     xmlns:gmlcov="http://www.opengis.net/gmlcov/1.0"
     xmlns:gmljp2="http://www.opengis.net/gmljp2/2.0"
     xmlns:swe="http://www.opengis.net/swe/2.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://www.opengis.net/gmljp2/2.0 gmlJP2.xsd">
  <gml:gridDomain/>
  <gml:rangeSet>
   <gml:File>
       <gml:rangeParameters/>
     <gml:fileName>gmljp2://codestream</gml:fileName>
     <gml:fileStructure>inapplicable</gml:fileStructure>
   </gml:File>
  </gml:rangeSet>
  <gmlcov:rangeType/>
  <gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="CodeStream">
     <gml:boundedBy>
      <gml:Envelope srsName="http://www.opengis.net/def/crs/EPSG/0/4326"
        axisLabels="Lat Long" uomLabels="deg deg" srsDimension="2">
   <gml:lowerCorner>12 12</gml:lowerCorner>
   <gml:upperCorner>13.5 13.5</gml:upperCorner>
      </gml:Envelope>
     </gml:boundedBy>
   <gml:domainSet>
      <gml:RectifiedGrid gml:id="rg0001_C0002" dimension="2"
            srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
        <gml:limits>
         <gml:GridEnvelope>
           <gml:low>0 0</gml:low>
           <gml:high>8718 7812</gml:high>
         </gml:GridEnvelope>
        </gml:limits>
        <gml:axisLabels>Lat Long</gml:axisLabels>
        <gml:origin>
         <gml:Point gml:id="P0001"
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
           <!– “Upper-left” image origin –>
           <gml:pos>9.9 9.9</gml:pos>
         </gml:Point>
        </gml:origin>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">0 1
        </gml:offsetVector>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">-1 0
        </gml:offsetVector>
      </gml:RectifiedGrid>
     </gml:domainSet>
     <gml:rangeSet>
      <gml:File>
        <gml:rangeParameters/>
        <gml:fileName>gmljp2://codestream</gml:fileName>
        <gml:fileStructure>inapplicable</gml:fileStructure>
      </gml:File>
     </gml:rangeSet>
     <gmlcov:rangeType>
      <swe:DataRecord>
        <swe:field name="red">
         <swe:Quantity definition="http://opengis.net/def/property/OGC/0/Radiance">
           <swe:description>Red Channel</swe:description>
           <swe:nilValues>
            <swe:NilValues id="NIL_VALUES">
              <swe:nilValue reason="http://www.opengis.net/def/nil/OGC/0/BelowDetectionRange">0</swe:nilValue>
              <swe:nilValue reason="http://www.opengis.net/def/nil/OGC/0/AboveDetectionRange">255</swe:nilValue>
            </swe:NilValues>
           </swe:nilValues>
           <swe:uom code="W/cm2"/>
           <swe:constraint>
            <swe:AllowedValues id="VALUE_SPACE">
              <swe:interval>0 255</swe:interval>
              <swe:significantFigures>3</swe:significantFigures>
            </swe:AllowedValues>
           </swe:constraint>
         </swe:Quantity>
        </swe:field>
      </swe:DataRecord>
     </gmlcov:rangeType>
   </gmljp2:GMLJP2RectifiedGridCoverage>
  </gmljp2:featureMember>
</gmljp2:GMLJP2CoverageCollection>

Note that the rangeSet is a required member of RectifiedGridCoverage, and so it must be included in the RectifiedGridCoverage. However, for GMLJP2 the range data is actually stored within the codestream in the JPEG 2000 file: there is no “file structure” to be specified.  The rangeSet members are therefore set to “inapplicable” except fileName that is set to gmljp2://codestream/{codestream_number}.

Multiple codestreams case

The multiple codestream encoding enables multiple images of the same or different type (different geometry, different radiometry) to be packaged in a single JPEG 2000 file. Stereo image pairs, triangulation blocks, orthoimagery with associated digital elevation models, and multi-source image assessment are examples of the use of multiple codestreams.

Note: The order of the coverage elements in the GMLJP2CoverageCollection will usually be the same than the codestreams but the actual association of a gmljp2:JPEG2000Coverage element with its codestream is done by the fileName element in the rangeSet.

Some parts of the GMLJP2 XML could be repeated in the description of several codestreams. In this case, the use of gml:id and xlink:href general GML mechanism can be used to reference elements and avoid duplication.

The root element GMLJP2CoverageCollection can describe a collection of codestreams.. The first codestream is described by the 1^st sub-elements of the collection and the next ones by further GMLJP2Coverage elements. These nested coverage collection description is shown in the example.

Minimal instance example for multiple codestreams

The GML data, at the minimum, consists of a root gmljp2: GMLJP2CoverageCollection for each codestream.

<gmljp2:GMLJP2CoverageCollection gml:id="JPEG2000_0"
     xmlns:gml="http://www.opengis.net/gml/3.2"
     xmlns:gmlcov="http://www.opengis.net/gmlcov/1.0"
     xmlns:gmljp2="http://www.opengis.net/gmljp2/2.0"
     xmlns:swe="http://www.opengis.net/swe/2.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://www.opengis.net/gmljp2/2.0 gmlJP2.xsd">
  <gml:gridDomain/>
  <gml:rangeSet>
   <gml:File>
       <gml:rangeParameters/>
     <gml:fileName>gmljp2://codestream</gml:fileName>
     <gml:fileStructure>inapplicable</gml:fileStructure>
   </gml:File>
  </gml:rangeSet>
  <gmlcov:rangeType/>
  <gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="CodeStream0">
   <gml:domainSet>
      <gml:RectifiedGrid gml:id="RG_CodeStream0" dimension="2"
            srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
        <gml:limits>
         <gml:GridEnvelope>
           <gml:low>0 0</gml:low>
           <gml:high>8718 7812</gml:high>
         </gml:GridEnvelope>
        </gml:limits>
        <gml:axisLabels>Lat Long</gml:axisLabels>
        <gml:origin>
         <gml:Point gml:id="P0001" srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
           <!– “Upper-left” image origin –>
           <gml:pos>9.9 9.9</gml:pos>
         </gml:Point>
        </gml:origin>
        <gml:offsetVector srsName="http://www.opengis.net/def/crs/EPSG/0/4326">0 1
        </gml:offsetVector>
        <gml:offsetVector srsName="http://www.opengis.net/def/crs/EPSG/0/4326">-1 0
        </gml:offsetVector>
      </gml:RectifiedGrid>
     </gml:domainSet>
     <gml:rangeSet>
      <gml:File>
        <gml:rangeParameters/>
        <gml:fileName>gmljp2://codestream/0</gml:fileName>
        <gml:fileStructure>inapplicable</gml:fileStructure>
      </gml:File>
     </gml:rangeSet>
     <gmlcov:rangeType>
      <swe:DataRecord>
        <swe:field name="codestream0">
        </swe:field>
      </swe:DataRecord>
     </gmlcov:rangeType>
   </gmljp2:GMLJP2RectifiedGridCoverage>
  </gmljp2:featureMember>
   <gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="CodeStream1">
   <gml:domainSet>
      <gml:RectifiedGrid gml:id="RG_CodeStream1" dimension="2"
            srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
        <gml:limits>
         <gml:GridEnvelope>
           <gml:low>0 0</gml:low>
           <gml:high>8718 7812</gml:high>
         </gml:GridEnvelope>
        </gml:limits>
        <gml:axisLabels>Lat Long</gml:axisLabels>
        <gml:origin/>
        <gml:offsetVector/>
      </gml:RectifiedGrid>
     </gml:domainSet>
     <gml:rangeSet>
      <gml:File>
        <gml:rangeParameters/>
        <gml:fileName>gmljp2://codestream/1</gml:fileName>
        <gml:fileStructure>inapplicable</gml:fileStructure>
      </gml:File>
     </gml:rangeSet>
     <gmlcov:rangeType>
      <swe:DataRecord>
        <swe:field name="codestream0">
        </swe:field>
      </swe:DataRecord>
     </gmlcov:rangeType>
   </gmljp2:GMLJP2RectifiedGridCoverage>
  </gmljp2:featureMember>
  <gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="CodeStream2">
   <gml:domainSet>
   <gml:RectifiedGrid gml:id="RG_CodeStream2" dimension="2"
            srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
        <gml:limits>
         <gml:GridEnvelope>
           <gml:low>0 0</gml:low>
           <gml:high>8718 7812</gml:high>
         </gml:GridEnvelope>
        </gml:limits>
        <gml:axisLabels>Lat Long</gml:axisLabels>
        <gml:origin/>
        <gml:offsetVector/>
      </gml:RectifiedGrid>
  </gml:domainSet>
     <gml:rangeSet>
      <gml:File>
        <gml:rangeParameters/>
     <gml:fileName>gmljp2://codestream/2</gml:fileName>
        <gml:fileStructure>inapplicable</gml:fileStructure>
      </gml:File>
     </gml:rangeSet>
     <gmlcov:rangeType>
      <swe:DataRecord>
        <swe:field name="codestream0">
        </swe:field>
      </swe:DataRecord>
     </gmlcov:rangeType>
   </gmljp2:GMLJP2RectifiedGridCoverage>
  </gmljp2:featureMember>
</gmljp2:GMLJP2CoverageCollection>

Image annotation (informative)

Introduction

In general, an annotation is a combination of a representation feature of interest (FOI) in the real world, a styled label that annotates the feature (such as a text label, an image, a video, graphics, audio, etc) and an association (abstract or a graphical explicit representation e.g. a line or an arrow) (see figure 7). Annotations are intended for visualization so that they are deeply link with visualization styles.

In this standard, an annotation is an association between a label that annotates a JPEG2000 image or some geometric feature of interest (FOI) within the JPEG2000 image. The geometric properties of the FOI may be defined by a GML geometry, which can be a point, line string, etc in the same CRS coordinates than the image. If no geometric region is defined the annotation applies to the entire image, i.e. the JPEG 2000 codestream. Labels associated to FOIs may be defined using different encodings depending of the software that generates them.

As an illustrative example, this standard is proposing the use of a combination of GML and KML. The reason behind this is to complement the limitations of GML and KML. Regions of Interest and embedded geographic features (typed objects) are best expressed in GML since GML has a precise notion of feature types (while KML does not) and GML supports arbitrary CRS (current versions of KML only supports WGS84). HTML  provides symbology for labels but the current versions of GML does not provide a recognized symbology mechanism (support for SVG introduced in GML 3.0 has been deprecated in newer versions). For the FOI the standard recommends the use GML (the application can portrayal in its own symbolization or cannot assume that the user will recognize them on the image). To describe the label to annotate the FOI KML is recommended (the application that portrayals it will be required to dynamically re-project the WGS84 KML data into the JPEG2000 CRS before presenting it). In addition, an explicit graphical association between the ROI and the label (e.g. a line or a curve) can be provided (the application that portrayals it can represent it if needed).

An alternative way of doing this mapping of the GML (feature type) to a SLD/SE symbolization that can also be packaged in the GMLJP2 so fulfilling requirements for disconnected systems. In this case, KML label could be generated on the fly from the GML and SDL/SE

In the future, the use of SLD/SE may enable the creation of a Portrayal Registry in which symbols, styles, etc are stored and reused by several JPEG2000 images.

Use-cases

GMLJP2 is intended to handle a variety of annotation use cases including the following:

Example 1: Creating a GMLJP2 annotated image:

•   Capture any object types (e.g. building – classify the building etc.) (GML)

•   Apply a style to generate a symbolization (KML)

•   Write the GML, KML and style (SLD/SE) into the GMLJP2 package

Example 2: Viewing a GMLJP2 annotated image

•   Retrieve the symbolization (KML) from the GMLJP2 and visualize as image overlay

•   Example 3: Apply user specified style to annotation in a GMLJP2 image

•   Retrieve the object type (GML) from the GMLJP2 and apply User style to generate KML (or SVG etc) and then visualize as image overlay.

•   Example 4: Apply default style to annotations in a GMLJP2 image

•   Retrieve the object type (GML), SLD/SE from the GMLJP2 and apply the SLD/SE to generate KML and then visualize as image overlay.

•   Currently, this standard does not provide any concrete annotation schema.

Annex A Abstract Test Suite
(normative)

A GMLJP2 implementation must satisfy the following system characteristics to be conformant with this specification.

A.1                          Conformance Test Class: core

The OGC URI identifier of this conformance class is:

http://www.opengis.net/spec/GMLJP2/2.0/conf/core

Tests identifiers below are relative to

http://www.opengis.net/spec/GMLJP2/2.0/conf/core

A.1.1                       GMLJP2 file contains a GMLCOV coverage

A.1.2                       GMLJP2 coverage metadata coherence with JPEG2000 header

A.1.3                       GMLJP2 file GMLCOV precedence

A.1.4                       Usage of gmlcov:metadata instead of gml:metaDataProperty

A.1.5                       CRS is well defined externally by URI

A.1.6                       CRS is defined for rectified coverages

A.1.7                       UoM in rangeType are defined when applicable

A.1.8                       UoM are defined by reference

A.1.9                       GMLJP2 file gmlcov-nil-values

A.1.10                    Nil-values by reference

A.1.11                    GMLJP2 file root is a coverage collection

A.1.12                    GMLJP2 file coverages

A.1.13                    GMLJP2 file gmlcov-metadata

A.1.14                    GMLJP2 file features

A.1.15                    GMLJP2 file annotations

A.1.16                    GMLJP2 file styles

A.1.17                    GMLJP2 file /req/gmlcov-filename-codestream

A.1.18                    GMLJP2 file XML boxes

A.1.19                    GMLJP2 file XML boxes signaled correctly

A.1.20                    GMLJP2 file is a jpx and jp2 compatible

A.1.21                    GMLJP2 file /req/ jp2-outer-box

A.1.22                    GMLJP2 file /req/jp2-other-outer-box

A.1.23                    GMLJP2 file /req/gmlcov-schemalocation

A.1.24                    GMLJP2 file /req/external-references

A.1.25                    GMLJP2 file /req/internal-references

A.1.26                    GMLJP2 file /req/internal-references-to-xmlbox

A.1.27                    GMLJP2 file /req/internal-references-to-codestream

Annex B UML diagrams
(informative)

This annex provides a UML class model of the GMLJP2 XML data structure defined in the Section 8. Figure 8 diagram shows that a GMJP2CoverageCollection is composed by featureMember’s that can be GMLJP2ReferenceableGridCoverage, GMLJP2GridCoverage or GMLJP2ReferencedGridCoverage (one for each codestream) all of them derived from the abstract GMLJP2Coverage that is extended from the GMLCOV::DiscreteCoverage and includes features, styles and annotations. GMLJP2ReferenceableGridCoverage can additionally contain generic features and styles.

The model contains many extension points for future extensions. In particular, the extension point of GMLCOV::Coverage is used to specifically contain metadata of several types.

Annex C XML Schemas documents
(informative)

In addition to this document, this standard includes some normative XML Schema Documents. These XML Schema Documents are included in this document. These XML Schema Documents are also posted online at the URL http://schemas.opengis.net/gmljp2/2.0. In the event of a discrepancy between the document and online versions of the XML Schema Documents, the online schema files SHALL be considered authoritative.

This XML Schema Document is named:

These XML Schema Documents use and build on GML 3.2.1 and GMLCov 1.0 XML Schemas

The GMLJP2 application schema is included in this annex: gmlJP2.xsd

<?xml version=“1.0” encoding=“UTF-8”?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:gmljp2="http://www.opengis.net/gmljp2/2.0"
xmlns:gml="http://www.opengis.net/gml/3.2"
xmlns:gmlcov="http://www.opengis.net/gmlcov/1.0"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:gmd="http://www.isotc211.org/2005/gmd"
xmlns:eop="http://www.opengis.net/eop/2.0"
xmlns:dc="http://purl.org/dc/elements/1.1/"
targetNamespace="http://www.opengis.net/gmljp2/2.0" elementFormDefault="qualified" version="3.1.1 2010-01-28">
  <import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.w3.org/1999/xlink.xsd"/>
  <import namespace="http://www.opengis.net/gmlcov/1.0" schemaLocation="http://schemas.opengis.net/gmlcov/1.0/gmlcovAll.xsd"/>
  <import namespace="http://www.opengis.net/gml/3.2" schemaLocation="http://schemas.opengis.net/gml/3.2.1/gml.xsd"/>
  <import namespace="http://www.isotc211.org/2005/gmd" schemaLocation="http://schemas.opengis.net/iso/19139/20070417/gmd/gmd.xsd"/>
  <import namespace="http://www.opengis.net/eop/2.0" schemaLocation="http://schemas.opengis.net/omeo/1.0/eop.xsd"/>
  <import namespace="http://purl.org/dc/elements/1.1/" schemaLocation="http://schemas.opengis.net/csw/2.0.2/rec-dcmes.xsd"/>
  <!– ==============================================================
                                   GMLJP2 Root elements and type
   ==============================================================–>
  <element name="GMLJP2CoverageCollection"
      type="gmljp2:GMLJP2CoverageCollectionType"
      substitutionGroup="gmlcov:AbstractCoverage">
   <annotation>
     <documentation/>
   </annotation>
  </element>
  <complexType name="GMLJP2CoverageCollectionType">
   <complexContent>
     <extension base="gmlcov:AbstractCoverageType">
      <sequence>
        <element name="featureMember" maxOccurs="unbounded">
         <complexType>
           <complexContent>
            <extension base="gml:AbstractFeatureMemberType">
              <sequence>
               <choice maxOccurs="unbounded">
                 <element ref="gmljp2:GMLJP2GridCoverage"/>
                 <element ref="gmljp2:GMLJP2RectifiedGridCoverage"/>
                 <element ref="gmljp2:GMLJP2ReferenceableGridCoverage"/>
                 <element ref="gmljp2:GMLJP2Features"/>
               </choice>
              </sequence>
              <attributeGroup ref="gml:AssociationAttributeGroup"/>
            </extension>
           </complexContent>
         </complexType>
        </element>
        <element name="style" type="gmljp2:GenericWithAssocPropertyType"
            minOccurs="0" maxOccurs="unbounded"/>
        <element name="extension" type="gmljp2:GenericWithAssocPropertyType"
            minOccurs="0" maxOccurs="unbounded"/>
      </sequence>
     </extension>
   </complexContent>
  </complexType>
  <element name="GMLJP2GridCoverage" type="gmljp2:GMLJP2CoverageType"
         substitutionGroup="gmlcov:GridCoverage">
   <annotation>
     <documentation/>
   </annotation>
  </element>
  <element name="GMLJP2RectifiedGridCoverage"  
     type="gmljp2:GMLJP2CoverageType"
      substitutionGroup="gmlcov:RectifiedGridCoverage">
   <annotation>
     <documentation/>
   </annotation>
  </element>
  <element name="GMLJP2ReferenceableGridCoverage"
       type="gmljp2:GMLJP2CoverageType"
      substitutionGroup="gmlcov:ReferenceableGridCoverage">
   <annotation>
     <documentation/>
   </annotation>
  </element>
  <element name="GMLJP2Features" type="gmljp2:GMLJP2FeaturesType"
        substitutionGroup="gml:AbstractFeature"/>
  <complexType name="GMLJP2FeaturesType">
   <complexContent>
     <extension base="gml:AbstractFeatureType">
      <sequence>
        <element name="feature">
         <complexType>
           <complexContent>
            <extension base="gml:AbstractFeatureMemberType">
              <sequence>
               <element ref="gml:AbstractFeature" minOccurs="0"
                     maxOccurs="unbounded"/>
              </sequence>
              <attributeGroup ref="gml:AssociationAttributeGroup"/>
            </extension>
           </complexContent>
         </complexType>
        </element>
        <element name="style" type="gmljp2:GenericWithAssocPropertyType"
               minOccurs="0" maxOccurs="unbounded"/>
        <element name="extension" type="gmljp2:GenericWithAssocPropertyType"
               minOccurs="0" maxOccurs="unbounded"/>
      </sequence>
     </extension>
   </complexContent>
  </complexType>
  <!– ==============================================================
                                     GMLJP2 coverage for a codestream
   ==============================================================–>
  <complexType name="GMLJP2CoverageType">
   <annotation>
     <documentation/>
   </annotation>
   <complexContent>
     <extension base="gmlcov:AbstractDiscreteCoverageType">
      <sequence>
        <element name="feature" type="gml:FeaturePropertyType" minOccurs="0"
               maxOccurs="unbounded"/>
        <element name="annotation" type="gmljp2:GenericWithAssocPropertyType"
               minOccurs="0" maxOccurs="unbounded"/>
        <element name="style" type="gmljp2:GenericWithAssocPropertyType"
               minOccurs="0" maxOccurs="unbounded"/>
        <element name="extension" type="gmljp2:GenericWithAssocPropertyType"
               minOccurs="0" maxOccurs="unbounded"/>
      </sequence>
     </extension>
   </complexContent>
  </complexType>
  <!– ==============================================================
                                                          Metadata Types
   ==============================================================–>
  <element name="Metadata" type="gmljp2:GenericMetadataType"
         substitutionGroup="gmlcov:Extension"/>
  <complexType name="GenericMetadataType">
   <complexContent>
     <restriction base="gmlcov:ExtensionType">
      <sequence>
        <choice minOccurs="0">
         <element name="isoMetadata" type="gmd:MD_Metadata_PropertyType"/>
         <element name="eopMetadata" maxOccurs="unbounded">
           <complexType>
            <sequence>
              <element ref="eop:EarthObservation"/>
            </sequence>
           </complexType>
         </element>
         <element name="dcMetadata" maxOccurs="unbounded">
           <complexType>
            <sequence minOccurs="0" maxOccurs="unbounded">
              <element ref="dc:DC-element"/>
            </sequence>
           </complexType>
         </element>
         <element name="metadata">
           <complexType mixed="true">
            <sequence>
              <any namespace="##other" processContents="lax" minOccurs="0"
                    maxOccurs="unbounded"/>
            </sequence>
            <attributeGroup ref="gml:AssociationAttributeGroup"/>
           </complexType>
         </element>
        </choice>
      </sequence>
     </restriction>
   </complexContent>
  </complexType>
  <!– ==============================================================
                                                          Generic Types
   ==============================================================–>
  <complexType name="GenericWithAssocPropertyType">
   <sequence>
     <any namespace="##other" processContents="lax"/>
   </sequence>
   <attributeGroup ref="gml:AssociationAttributeGroup"/>
  </complexType>
</schema>

Annex D GMLJP2 examples
(informative)

D.1.   ISO19115-ISO19139 metadata example

<?xml version=“1.0” encoding=“UTF-8”?>
<gmljp2:GMLJP2CoverageCollection gml:id="JPEG2000_0" xsi:schemaLocation="http://www.opengis.net/gmljp2/2.0 gmlJP2.xsd"
xmlns:gml="http://www.opengis.net/gml/3.2"
xmlns:gmlcov="http://www.opengis.net/gmlcov/1.0"
xmlns:gmljp2="http://www.opengis.net/gmljp2/2.0"
xmlns:gmd="http://www.isotc211.org/2005/gmd"
xmlns:gco="http://www.isotc211.org/2005/gco"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<gml:gridDomain/>
  <gml:rangeSet>
   <gml:File>
       <gml:rangeParameters/>
     <gml:fileName>gmljp2://codestream</gml:fileName>
     <gml:fileStructure>inapplicable</gml:fileStructure>
   </gml:File>
  </gml:rangeSet>
  <gmlcov:rangeType/>
<gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="ID_1">
     <gml:boundedBy>
      <gml:Null>withheld</gml:Null>
     </gml:boundedBy>
     <gml:domainSet>
      <gml:RectifiedGrid gml:id="rg0001_C0002" dimension="2"
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
        <gml:limits>
         <gml:GridEnvelope>
           <gml:low>0 0</gml:low>
           <gml:high>6208 3103</gml:high>
         </gml:GridEnvelope>
        </gml:limits>
        <gml:axisLabels>Lat Long</gml:axisLabels>
        <gml:origin>
         <gml:Point gml:id="P0001"
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
           <gml:pos>41.4756576954751 2.04345415526392</gml:pos>
         </gml:Point>
        </gml:origin>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">0 3.71e-005</gml:offsetVector>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">-3.71e-005 0</gml:offsetVector>
      </gml:RectifiedGrid>
     </gml:domainSet>
     <gml:rangeSet>
      <gml:File>
        <gml:rangeParameters/>
        <gml:fileName>gmljp2://codestream/0</gml:fileName>
        <gml:fileStructure>inapplicable</gml:fileStructure>
      </gml:File>
     </gml:rangeSet>
     <gmlcov:metadata>
      <gmljp2:Metadata>
        <gmljp2:isoMetadata>
         <gmd:MD_Metadata>
           <gmd:fileIdentifier><gco:CharacterString>111111</gco:CharacterString>
           </gmd:fileIdentifier>
           <gmd:hierarchyLevel>
           <gmd:MD_ScopeCode
eListValue="http://schemas.opengis.net/iso/19139/20070417/resources/Codelist/ML_gmxCodelists.xml#MD_ScopeCode" codeList="dataset">dataset</gmd:MD_ScopeCode></gmd:hierarchyLevel>
             <gmd:hierarchyLevelName>
            <gco:CharacterString>dataset</gco:CharacterString>
             </gmd:hierarchyLevelName>
             <gmd:contact>
            <gmd:CI_ResponsibleParty>
              <gmd:individualName>
              <gco:CharacterString>GRAMP</gco:CharacterString>
              </gmd:individualName>
              <gmd:organisationName>
              <gco:CharacterString>Departament de Geografia, UAB</gco:CharacterString>
              </gmd:organisationName>
              <gmd:contactInfo>
              <gmd:CI_Contact>
                <gmd:phone>
               <gmd:CI_Telephone>
                 <gmd:voice>
                 <gco:CharacterString>+34 93 581 41 33</gco:CharacterString>
                 </gmd:voice>
            </gmd:CI_Telephone>
                </gmd:phone>
                <gmd:address>
               <gmd:CI_Address>
                 <gmd:city>
                 <gco:CharacterString>Cerdanyola del Valles</gco:CharacterString>
                 </gmd:city>
                 <gmd:postalCode>
           <gco:CharacterString>08193</gco:CharacterString>
                 </gmd:postalCode>
                 <gmd:electronicMailAddress>            <gco:CharacterString>joanmanuel.soriano@uab.cat</gco:CharacterString>
                 </gmd:electronicMailAddress>
               </gmd:CI_Address>
                </gmd:address>
                <gmd:onlineResource>
               <gmd:CI_OnlineResource>
                 <gmd:linkage>
         <gmd:URL>http://mediterrani.uab.es/web/catala/index.htm</gmd:URL>
                 </gmd:linkage>
                 <gmd:function>
                 <gmd:CI_OnLineFunctionCode
codeList="http://idec.icc.cat/schema/resources/Codelist/ML_gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">Informacio</gmd:CI_OnLineFunctionCode>
                 </gmd:function>
               </gmd:CI_OnlineResource>
                </gmd:onlineResource>
              </gmd:CI_Contact>
              </gmd:contactInfo>
              <gmd:role>
              <gmd:CI_RoleCode
codeList="http://idec.icc.cat/schema/resources/Codelist/ML_gmxCodelists.xml#CI_RoleCode" codeListValue="originator">Creador</gmd:CI_RoleCode>
               </gmd:role>
              </gmd:CI_ResponsibleParty>
             </gmd:contact>
             <gmd:dateStamp>
            <gco:Date>2006-12-13</gco:Date>
             </gmd:dateStamp>
             <gmd:metadataStandardName>
            <gco:CharacterString>ISO 19115:2003/Cor.1:2006 Geographic Information - Metadata</gco:CharacterString>
             </gmd:metadataStandardName>
             <gmd:metadataStandardVersion>
            <gco:CharacterString>IS</gco:CharacterString>
             </gmd:metadataStandardVersion>
             <gmd:spatialRepresentationInfo>
            <gmd:MD_Georectified>
              <gmd:numberOfDimensions>
              <gco:Integer>2</gco:Integer>
              </gmd:numberOfDimensions>
              <gmd:axisDimensionProperties>
              <gmd:MD_Dimension>
                <gmd:dimensionName>
                <gmd:MD_DimensionNameTypeCode
codeList="http://idec.icc.cat/schema/resources/Codelist/ML_gmxCodelists.xml#MD_DimensionNameTypeCode" codeListValue="row">Fila</gmd:MD_DimensionNameTypeCode>
                </gmd:dimensionName>
                <gmd:dimensionSize>
               <gco:Integer>7734</gco:Integer>
                </gmd:dimensionSize>
                <gmd:resolution>
               <gco:Length uom="m">1</gco:Length>
                </gmd:resolution>
              </gmd:MD_Dimension>
              </gmd:axisDimensionProperties>
              <gmd:axisDimensionProperties>
              <gmd:MD_Dimension>
                <gmd:dimensionName>
               <gmd:MD_DimensionNameTypeCode
codeList="http://idec.icc.cat/schema/resources/Codelist/ML_gmxCodelists.xml#MD_DimensionNameTypeCode" codeListValue="column">Columna</gmd:MD_DimensionNameTypeCode>
                </gmd:dimensionName>
                <gmd:dimensionSize>
               <gco:Integer>7950</gco:Integer>
                </gmd:dimensionSize>
                <gmd:resolution>
               <gco:Length uom="m">1</gco:Length>
                </gmd:resolution>
              </gmd:MD_Dimension>
              </gmd:axisDimensionProperties>
              <gmd:cellGeometry>
              <gmd:MD_CellGeometryCode
codeList="http://idec.icc.cat/schema/resources/Codelist/ML_gmxCodelists.xml#MD_CellGeometryCode" codeListValue="area">Area</gmd:MD_CellGeometryCode>
              </gmd:cellGeometry>
              <gmd:transformationParameterAvailability>
              <gco:Boolean>true</gco:Boolean>
              </gmd:transformationParameterAvailability>
              <gmd:checkPointAvailability>
              <gco:Boolean>false</gco:Boolean>
              </gmd:checkPointAvailability>         
              <gmd:pointInPixel>
         <gmd:MD_PixelOrientationCode>center</gmd:MD_PixelOrientationCode>
              </gmd:pointInPixel>
            </gmd:MD_Georectified>
             </gmd:spatialRepresentationInfo>
             <gmd:referenceSystemInfo>
            <gmd:MD_ReferenceSystem>
              <gmd:referenceSystemIdentifier>
              <gmd:RS_Identifier>
                <gmd:code>
               <gco:CharacterString>EPSG:23031</gco:CharacterString>
                </gmd:code>
              </gmd:RS_Identifier>
              </gmd:referenceSystemIdentifier>
            </gmd:MD_ReferenceSystem>
             </gmd:referenceSystemInfo>
             <gmd:identificationInfo>
            <gmd:MD_DataIdentification>
               <gmd:citation>
              <gmd:CI_Citation>
                <gmd:title>
               <gco:CharacterString>Finestra de Vol america 1956-57. Fotograma: 28464; passada: 280; full IGN: 445; data: 05-10-1956</gco:CharacterString>
             </gmd:title>
                <gmd:date>
               <gmd:CI_Date>
                 <gmd:date>
                 <gco:Date>2006-12-01</gco:Date>
                 </gmd:date>
                 <gmd:dateType>
                 <gmd:CI_DateTypeCode
codeList="http://idec.icc.cat/schema/resources/Codelist/ML_gmxCodelists.xml#CI_DateTypeCode" codeListValue="creation">Creacio</gmd:CI_DateTypeCode>
                 </gmd:dateType>
               </gmd:CI_Date>
                </gmd:date>
                <gmd:editionDate>
               <gco:Date>2006-12-01</gco:Date>
                </gmd:editionDate>
              </gmd:CI_Citation>
              </gmd:citation>
              <gmd:abstract>
              <gco:CharacterString>Correccio geometrica d’un fotograma escanejat, a resolucio de 800 DPI, corresponent al vol america realitzat entre 1956 i 1957. Es tracta del full 445 del Instituto Geografico Nacional (IGN).</gco:CharacterString>
              </gmd:abstract>
              <gmd:pointOfContact>
              <gmd:CI_ResponsibleParty>
                <gmd:individualName>
               <gco:CharacterString>GRAMP</gco:CharacterString>
                </gmd:individualName>
                <gmd:organisationName>
               <gco:CharacterString>Departament de Geografia, UAB</gco:CharacterString>
                </gmd:organisationName>
                <gmd:contactInfo>
               <gmd:CI_Contact>
                 <gmd:address>
                 <gmd:CI_Address>
                   <gmd:city>
                  <gco:CharacterString>Cerdanyola del Valles</gco:CharacterString>
                   </gmd:city>
                   <gmd:postalCode>
                  <gco:CharacterString>08193</gco:CharacterString>
                   </gmd:postalCode>
                   <gmd:electronicMailAddress>
                  <gco:CharacterString>joanmanuel.soriano@uab.cat</gco:CharacterString>
                   </gmd:electronicMailAddress>
                 </gmd:CI_Address>
                 </gmd:address>
               </gmd:CI_Contact>
                </gmd:contactInfo>
                <gmd:role>
               <gmd:CI_RoleCode codeList="http://idec.icc.cat/schema/resources/Codelist/ML_gmxCodelists.xml#CI_RoleCode" codeListValue="originator">Creador</gmd:CI_RoleCode>
                </gmd:role>
              </gmd:CI_ResponsibleParty>
              </gmd:pointOfContact>
              <gmd:descriptiveKeywords>
              <gmd:MD_Keywords>
                <gmd:keyword>
               <gco:CharacterString>Fotografia Aeria</gco:CharacterString>
                </gmd:keyword>
                <gmd:type>
               <gmd:MD_KeywordTypeCode codeList="http://idec.icc.cat/schema/resources/Codelist/ML_gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="theme">Tema</gmd:MD_KeywordTypeCode>
                </gmd:type>
              </gmd:MD_Keywords>
              </gmd:descriptiveKeywords>
              <gmd:language>
              <gmd:LanguageCode
codeList="http://idec.icc.cat/schema/resources/Codelist/ML_gmxCodelists.xml#LanguageCode" codeListValue="cat">Catala</gmd:LanguageCode>
              </gmd:language>
              <gmd:topicCategory>
  <gmd:MD_TopicCategoryCode>imageryBaseMapsEarthCover</gmd:MD_TopicCategoryCode>
              </gmd:topicCategory>
              <gmd:extent>
              <gmd:EX_Extent>
                <gmd:geographicElement>
               <gmd:EX_GeographicBoundingBox>
                 <gmd:extentTypeCode>
                 <gco:Boolean>true</gco:Boolean>
                 </gmd:extentTypeCode>
                 <gmd:westBoundLongitude>
                 <gco:Decimal>1.06474287929127</gco:Decimal>
                 </gmd:westBoundLongitude>
                 <gmd:eastBoundLongitude>
                 <gco:Decimal>1.16161798316134</gco:Decimal>
                 </gmd:eastBoundLongitude>
                 <gmd:southBoundLatitude>
                 <gco:Decimal>41.240141115081</gco:Decimal>
                 </gmd:southBoundLatitude>
                 <gmd:northBoundLatitude>
                 <gco:Decimal>41.3113229349326</gco:Decimal>
              </gmd:northBoundLatitude>
               </gmd:EX_GeographicBoundingBox>
                </gmd:geographicElement>
              </gmd:EX_Extent>
              </gmd:extent>
            </gmd:MD_DataIdentification>
           </gmd:identificationInfo>
           </gmd:MD_Metadata>
        </gmljp2:isoMetadata>
      </gmljp2:Metadata>
     </gmlcov:metadata>
     <gmlcov:rangeType/>
   </gmljp2:GMLJP2RectifiedGridCoverage>
</gmljp2:featureMember>
</gmljp2:GMLJP2CoverageCollection>

D.2.   Earth Observation profile example

NB: It should be noted that EOP schema uses URN instead of URL.

<?xml version=“1.0” encoding=“UTF-8”?>
<gmljp2:GMLJP2CoverageCollection gml:id="JPEG2000_0" xsi:schemaLocation="http://www.opengis.net/gmljp2/2.0 gmlJP2.xsd"
xmlns:gml="http://www.opengis.net/gml/3.2"
xmlns:gmlcov="http://www.opengis.net/gmlcov/1.0"
xmlns:gmljp2="http://www.opengis.net/gmljp2/2.0"
xmlns:gmd="http://www.isotc211.org/2005/gmd"
xmlns:swe="http://www.opengis.net/swe/2.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <gml:gridDomain/>
  <gml:rangeSet>
   <gml:File>
       <gml:rangeParameters/>
     <gml:fileName>gmljp2://codestream/</gml:fileName>
     <gml:fileStructure>inapplicable</gml:fileStructure>
   </gml:File>
  </gml:rangeSet>
  <gmlcov:rangeType/>
  <gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="ID_1">
     <gml:boundedBy>
      <gml:Null>withheld</gml:Null>
     </gml:boundedBy>
     <gml:domainSet>
      <gml:RectifiedGrid gml:id="rg0001_C0002" dimension="2"
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
        <gml:limits>
         <gml:GridEnvelope>
           <gml:low>0 0</gml:low>
           <gml:high>6208 3103</gml:high>
         </gml:GridEnvelope>
        </gml:limits>
        <gml:axisName>x</gml:axisName>
        <gml:axisName>y</gml:axisName>
        <gml:origin>
         <gml:Point gml:id="P0001"
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
           <gml:pos>41.4756576954751 2.04345415526392</gml:pos>
         </gml:Point>
        </gml:origin>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">0     3.7163372079825e-005</gml:offsetVector>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">-3.71633720798261e-005 0</gml:offsetVector>
      </gml:RectifiedGrid>
     </gml:domainSet>
  <gml:rangeSet>
      <gml:File>
        <gml:rangeParameters/>
        <gml:fileName>gmljp2://codestream/0</gml:fileName>
        <gml:fileStructure>inapplicable</gml:fileStructure>
      </gml:File>
     </gml:rangeSet>
     <gml:coverageFunction>
      <gml:MappingRule/>
     </gml:coverageFunction>
     <gmlcov:rangeType/>
     <gmlcov:metadata>
      <gmljp2:Metadata>
        <gmljp2:eopMetadata>
         <eop:EarthObservation
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://www.opengis.net/eop/2.0 http://schemas.opengis.org/omeo/1.0/eop.xsd
            http://www.opengis.net/opt/2.0 http://schemas.opengis.net/omeo/1.0/opt.xsd"
            xmlns:xlink="http://www.w3.org/1999/xlink"
            xmlns:gml="http://www.opengis.net/gml/3.2"
            xmlns:eop="http://www.opengis.net/eop/2.0"
            xmlns:opt="http://www.opengis.net/opt/2.0"
            xmlns:ows="http://www.opengis.net/ows/2.0"
            xmlns:swe="http://www.opengis.net/swe/1.0"
            xmlns:om="http://www.opengis.net/om/2.0"
gml:id="opt_example_1">
           <om:phenomenonTime>
            <gml:TimePeriod gml:id="tp_2">
              <gml:beginPosition>2001-08-22T11:02:47.000</gml:beginPosition>
              <gml:endPosition>2001-08-22T11:02:47.999</gml:endPosition>
            </gml:TimePeriod>
           </om:phenomenonTime>
           <om:resultTime>
            <!– repeat of archiving date? –>
            <gml:TimeInstant gml:id="archivingdate_1">
              <gml:timePosition>2001-08-22T11:02:47.999</gml:timePosition>
            </gml:TimeInstant>
           </om:resultTime>
           <om:procedure>
            <eop:EarthObservationEquipment gml:id="eop_2">
              <eop:platform>
               <eop:Platform>
                 <eop:shortName>PHR</eop:shortName>
                 <eop:serialIdentifier>1A</eop:serialIdentifier>
                </eop:Platform>
              </eop:platform>
              <eop:instrument>
               <eop:Instrument>
                 <eop:shortName>PHR</eop:shortName>
               </eop:Instrument>
              </eop:instrument>
              <eop:sensor>
               <eop:Sensor>
                 <eop:sensorType>OPTICAL</eop:sensorType>
                 <eop:operationalMode
codeSpace="urn:eop:PHR:sensorMode">PX</eop:operationalMode>
                 <eop:resolution uom="m">0.7</eop:resolution>
               </eop:Sensor>
              </eop:sensor>
              <eop:acquisitionParameters>
               <eop:Acquisition>
                 <eop:orbitNumber>12</eop:orbitNumber>
                 <eop:lastOrbitNumber>12</eop:lastOrbitNumber>
                 <eop:orbitDirection>ASCENDING</eop:orbitDirection>
                 <eop:illuminationAzimuthAngle
uom="deg">10</eop:illuminationAzimuthAngle>
                 <eop:acrossTrackIncidenceAngle
uom="deg">14.0</eop:acrossTrackIncidenceAngle>
                 <eop:alongTrackIncidenceAngle
uom="deg">13.9</eop:alongTrackIncidenceAngle>
                 <eop:pitch uom="deg">0</eop:pitch>
                 <eop:roll uom="deg">0</eop:roll>
                 <eop:yaw uom="deg">0</eop:yaw>
               </eop:Acquisition>
              </eop:acquisitionParameters>
            </eop:EarthObservationEquipment>
           </om:procedure>
           <om:observedProperty xlink:href="#params1"/>
           <om:featureOfInterest>
            <eop:Footprint gml:id="fp_2">
              <eop:multiExtentOf>
               <gml:MultiSurface gml:id="ms_2" srsName=" urn:EPSG:4326">
                 <gml:surfaceMembers>
                  <gml:Polygon gml:id="fppoly_2">
                    <gml:exterior>
                     <gml:LinearRing>
                       <gml:posList>2.1025 43.516667 2.861667 43.381667 2.65
                        42.862778 1.896944 42.996389 2.1025 43.516667
                       </gml:posList>
                     </gml:LinearRing>
                    </gml:exterior>
                  </gml:Polygon>
                 </gml:surfaceMembers>
               </gml:MultiSurface>
              </eop:multiExtentOf>
              <eop:centerOf>
               <gml:Point gml:id="pt_2" srsName=" urn:EPSG::4326">
                 <gml:pos>2.374167 43.190833</gml:pos>
               </gml:Point>
              </eop:centerOf>
            </eop:Footprint>
           </om:featureOfInterest>
           <om:result>
            <opt:EarthObservationResult gml:id="eor_2">
              <eop:browse>
               <eop:BrowseInformation>
                 <eop:type>QUICKLOOK</eop:type>
                 <eop:referenceSystemIdentifier
codeSpace="EPSG"> urn:EPSG:4326</eop:referenceSystemIdentifier>
                 <eop:fileName>
                  <ows:ServiceReference
xmlns="http://www.opengis.net/ows/2.0" xlink:href="http://www.mybrowse.com/et"><ows:RequestMessage></ows:RequestMessage></ows:ServiceReference>
                 </eop:fileName>
                 <eop:fileName
href="http://eop.xxx.xx/catalog/E123N45_0101_01234.jpg"></eop:fileName>
               </eop:BrowseInformation>
              </eop:browse>
              <eop:mask>
               <eop:MaskInformation>
                 <eop:type>CLOUD</eop:type>
                 <eop:format>VECTOR</eop:format>
                 <eop:fileName>
                  <ows:ServiceReference
xmlns="http://www.opengis.net/ows/2.0" xlink:href="http://www.mybrowse.com/et"><ows:RequestMessage></ows:RequestMessage></ows:ServiceReference>
                 </eop:fileName>
                 <!– <eop:fileName> http://eop.xxx.xx/catalog/E123N45_0101_01234.gml</eop:fileName –>
               </eop:MaskInformation>
              </eop:mask>
              <opt:cloudCoverPercentage
uom="%">30</opt:cloudCoverPercentage>
            </opt:EarthObservationResult>
           </om:result>
           <eop:metaDataProperty>
            <eop:EarthObservationMetaData>
              <eop:identifier>E123N45_0101_01234</eop:identifier>
              <eop:acquisitionType>NOMINAL</eop:acquisitionType>
              <eop:productType>TBD</eop:productType>
              <eop:status>ACQUIRED</eop:status>
              <eop:downlinkedTo>
               <eop:DownlinkInformation>
                 <eop:acquisitionStation
codeSpace="urn:eop:PHR:stationCode"
                  >TLS</eop:acquisitionStation>
               </eop:DownlinkInformation>
              </eop:downlinkedTo>
              <eop:archivedIn>
               <eop:ArchivingInformation>
                 <eop:archivingCenter codeSpace="urn:eop:PHR:stationCode"
                  >TLS</eop:archivingCenter>
                 <eop:archivingDate>2001-08-22T11:02:47.999</eop:archivingDate>
               </eop:ArchivingInformation>
              </eop:archivedIn>
              <eop:imageQualityDegradation
uom="%">0</eop:imageQualityDegradation>
              <eop:processing>
               <eop:ProcessingInformation/>
              </eop:processing>
            </eop:EarthObservationMetaData>
           </eop:metaDataProperty>
         </eop:EarthObservation>
        </gmljp2:eopMetadata>
      </gmljp2:Metadata>
     </gmlcov:metadata>
   </gmljp2:GMLJP2RectifiedGridCoverage>
  </gmljp2:featureMember>
</gmljp2:GMLJP2CoverageCollection>

D.3.   Dublin Core metadata example

<?xml version=“1.0” encoding=“UTF-8”?>
<gmljp2:GMLJP2CoverageCollection gml:id="JPEG2000_0" xsi:schemaLocation="http://www.opengis.net/gmljp2/2.0 gmlJP2.xsd"
xmlns:gml="http://www.opengis.net/gml/3.2"
xmlns:gmlcov="http://www.opengis.net/gmlcov/1.0"
xmlns:gmljp2="http://www.opengis.net/gmljp2/2.0"
xmlns:gmd="http://www.isotc211.org/2005/gmd"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <gml:gridDomain/>
  <gml:rangeSet>
   <gml:File>
       <gml:rangeParameters/>
     <gml:fileName>gmljp2://codestream/</gml:fileName>
     <gml:fileStructure>inapplicable</gml:fileStructure>
   </gml:File>
  </gml:rangeSet>
  <gmlcov:rangeType/>
  <gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="ID_1">
     <gml:boundedBy>
      <gml:Null>withheld</gml:Null>
     </gml:boundedBy>
     <gml:domainSet>
      <gml:RectifiedGrid gml:id="rg0001_C0002" dimension="2"
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
        <gml:limits>
         <gml:GridEnvelope>
           <gml:low>0 0</gml:low>
           <gml:high>6208 3103</gml:high>
         </gml:GridEnvelope>
        </gml:limits>
        <gml:axisName>x</gml:axisName>
        <gml:axisName>y</gml:axisName>
        <gml:origin>
         <gml:Point gml:id="P0001"
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
           <gml:pos>41.4756576954751 2.04345415526392</gml:pos>
         </gml:Point>
        </gml:origin>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">0     3.7163372079825e-005</gml:offsetVector>
        <gml:offsetVector srsName="urn:ogc:def:crs:EPSG::4326">-3.71633720798261e-005 0</gml:offsetVector>
      </gml:RectifiedGrid>
     </gml:domainSet>
     <gml:rangeSet>
      <gml:File>
        <gml:rangeParameters/>
        <gml:fileName>gmljp2://codestream/0</gml:fileName>
        <gml:fileStructure>inapplicable</gml:fileStructure>
      </gml:File>
     </gml:rangeSet>
     <gml:coverageFunction>
      <gml:MappingRule/>
     </gml:coverageFunction>
     <gmlcov:rangeType/>
     <gmlcov:metadata>
      <gmljp2:Metadata>
        <gmljp2:dcMetadata
xsi:schemaLocation="http://purl.org/dc/elements/1.1/ http://schemas.opengis.net/csw/2.0.2/rec-dcmes.xsd">
         <dc:title>Features that are common to all codestreams</dc:title>
         <dc:publisher>ogc</dc:publisher>
        </gmljp2:dcMetadata>
      </gmljp2:Metadata>
     </gmlcov:metadata>
   </gmljp2:GMLJP2RectifiedGridCoverage>
  </gmljp2:featureMember>
</gmljp2:GMLJP2CoverageCollection>

D.4.   C.4 Free text metadata example

<gmljp2:GMLJP2CoverageCollection gml:id="JPEG2000_0" xsi:schemaLocation="http://www.opengis.net/gmljp2/2.0 gmlJP2.xsd"
xmlns:gml="http://www.opengis.net/gml/3.2"
xmlns:gmlcov="http://www.opengis.net/gmlcov/1.0"
xmlns:gmljp2="http://www.opengis.net/gmljp2/2.0"
xmlns:gmd="http://www.isotc211.org/2005/gmd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <gml:gridDomain/>
  <gml:rangeSet>
   <gml:File>
       <gml:rangeParameters/>
     <gml:fileName>gmljp2://codestream/</gml:fileName>
     <gml:fileStructure>inapplicable</gml:fileStructure>
   </gml:File>
  </gml:rangeSet>
  <gmlcov:rangeType/>
  <gmljp2:featureMember>
   <gmljp2:GMLJP2RectifiedGridCoverage gml:id="ID_1">
     <gml:boundedBy>
      <gml:Null>withheld</gml:Null>
     </gml:boundedBy>
     <gml:domainSet>
      <gml:RectifiedGrid gml:id="rg0001_C0002" dimension="2"
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
        <gml:limits>
         <gml:GridEnvelope>
           <gml:low>0 0</gml:low>
           <gml:high>6208 3103</gml:high>
         </gml:GridEnvelope>
        </gml:limits>
        <gml:axisName>x</gml:axisName>
        <gml:axisName>y</gml:axisName>
        <gml:origin>
         <gml:Point gml:id="P0001"
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">
           <gml:pos>41.4756576954751 2.04345415526392</gml:pos>
         </gml:Point>
        </gml:origin>
        <gml:offsetVector
srsName="http://www.opengis.net/def/crs/EPSG/0/4326">0     3.7163372079825e-005</gml:offsetVector>
        <gml:offsetVector srsName="urn:ogc:def:crs:EPSG::4326">-3.71633720798261e-005 0</gml:offsetVector>
      </gml:RectifiedGrid>
     </gml:domainSet>
     <gml:rangeSet>
      <gml:File>
        <gml:rangeParameters/>
        <gml:fileName>gmljp2://codestream/0</gml:fileName>
        <gml:fileStructure>inapplicable</gml:fileStructure>
      </gml:File>
     </gml:rangeSet>
     <gml:coverageFunction>
      <gml:MappingRule/>
     </gml:coverageFunction>
     <gmlcov:rangeType/>
     <gmlcov:metadata>
      <gmljp2:Metadata>
        <gmljp2:metadata>Some simple textual metadata</gmljp2:metadata>
      </gmljp2:Metadata>
     </gmlcov:metadata>
   </gmljp2:GMLJP2RectifiedGridCoverage>
  </gmljp2:featureMember>
</gmljp2:GMLJP2CoverageCollection>

Annex E Bibliography

[1]

ISO 19139, Geographic Information – Metadata – XML schema implementation.

[2]

OGC 12-083 GMLJP2 Extensions

[3]

OGC 12-108 GML Application Schema - Coverages - JPEG2000 Coverage Encoding Extension

Annex F Revision History