Open Geospatial Consortium

Submission Date: 2022-07-20

Approval Date:   2022-12-12

Publication Date:   2023-01-11

External identifier of this OGC® document: http://www.opengis.net/doc/NOTE/I3S-notes/1.3

Internal reference number of this OGC® document:    22-032r1

Version: 1.3

Category: OGC® Release Notes

Editor:  Carl Reed, PhD

OGC Indexed 3d Scene Layer (I3S) and Scene Layer Package Format Version 1.3 Release Notes

Copyright notice

Copyright © 2023 Open Geospatial Consortium

To obtain additional rights of use, visit http://www.ogc.org/legal/

Warning

This document is not an OGC standard. This document provides release notes for an OGC standard. This document is subject to change without notice and may not be referred to as an OGC Standard.

Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation.

Document type:    OGC® Release notes

Document subtype:   

Document stage:    Approved

Document language:  English

License Agreement

Permission is hereby granted by the Open Geospatial Consortium, ("Licensor"), free of charge and subject to the terms set forth below, to any person obtaining a copy of this Intellectual Property and any associated documentation, to deal in the Intellectual Property without restriction (except as set forth below), including without limitation the rights to implement, use, copy, modify, merge, publish, distribute, and/or sublicense copies of the Intellectual Property, and to permit persons to whom the Intellectual Property is furnished to do so, provided that all copyright notices on the intellectual property are retained intact and that each person to whom the Intellectual Property is furnished agrees to the terms of this Agreement.

If you modify the Intellectual Property, all copies of the modified Intellectual Property must include, in addition to the above copyright notice, a notice that the Intellectual Property includes modifications that have not been approved or adopted by LICENSOR.

THIS LICENSE IS A COPYRIGHT LICENSE ONLY, AND DOES NOT CONVEY ANY RIGHTS UNDER ANY PATENTS THAT MAY BE IN FORCE ANYWHERE IN THE WORLD.

THE INTELLECTUAL PROPERTY IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE DO NOT WARRANT THAT THE FUNCTIONS CONTAINED IN THE INTELLECTUAL PROPERTY WILL MEET YOUR REQUIREMENTS OR THAT THE OPERATION OF THE INTELLECTUAL PROPERTY WILL BE UNINTERRUPTED OR ERROR FREE. ANY USE OF THE INTELLECTUAL PROPERTY SHALL BE MADE ENTIRELY AT THE USER’S OWN RISK. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR ANY CONTRIBUTOR OF INTELLECTUAL PROPERTY RIGHTS TO THE INTELLECTUAL PROPERTY BE LIABLE FOR ANY CLAIM, OR ANY DIRECT, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM ANY ALLEGED INFRINGEMENT OR ANY LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR UNDER ANY OTHER LEGAL THEORY, ARISING OUT OF OR IN CONNECTION WITH THE IMPLEMENTATION, USE, COMMERCIALIZATION OR PERFORMANCE OF THIS INTELLECTUAL PROPERTY.

This license is effective until terminated. You may terminate it at any time by destroying the Intellectual Property together with all copies in any form. The license will also terminate if you fail to comply with any term or condition of this Agreement. Except as provided in the following sentence, no such termination of this license shall require the termination of any third party end-user sublicense to the Intellectual Property which is in force as of the date of notice of such termination. In addition, should the Intellectual Property, or the operation of the Intellectual Property, infringe, or in LICENSOR’s sole opinion be likely to infringe, any patent, copyright, trademark or other right of a third party, you agree that LICENSOR, in its sole discretion, may terminate this license without any compensation or liability to you, your licensees or any other party. You agree upon termination of any kind to destroy or cause to be destroyed the Intellectual Property together with all copies in any form, whether held by you or by any third party.

Except as contained in this notice, the name of LICENSOR or of any other holder of a copyright in all or part of the Intellectual Property shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Intellectual Property without prior written authorization of LICENSOR or such copyright holder. LICENSOR is and shall at all times be the sole entity that may authorize you or any third party to use certification marks, trademarks or other special designations to indicate compliance with any LICENSOR standards or specifications. This Agreement is governed by the laws of the Commonwealth of Massachusetts. The application to this Agreement of the United Nations Convention on Contracts for the International Sale of Goods is hereby expressly excluded. In the event any provision of this Agreement shall be deemed unenforceable, void or invalid, such provision shall be modified so as to make it valid and enforceable, and as so modified the entire Agreement shall remain in full force and effect. No decision, action or inaction by LICENSOR shall be construed to be a waiver of any rights or remedies available to it.

Preface

This document provides the set of revision notes for version 1.3 of the OGC I3S Community Standard [OGC <document number>]> and does not modify that standard.

This document provides the details of edits, deficiency corrections, and enhancements of the above-referenced standard. These notes also documents those items that have been deprecated. Finally, this document provides implementations details related to issues of backwards compatibility.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The Open Geospatial Consortium shall not be held responsible for identifying any or all such patent rights.

Recipients of this document are requested to submit, with their comments, notification of any relevant patent claims or other intellectual property rights of which they may be aware that might be infringed by any implementation of the standard set forth in this document, and to provide supporting documentation.

Keywords ogcdoc, I3S, 3D, streaming, scene layers, release notes

1. Abstract

These I3S Release notes document changes incorporated into the OGC I3S Community Standard version 1.3.

2. Introduction

2.1. Scope

This Release Notes document provides information on changes to Version 1.3 of the OGC I3S Community Standard. The addition of the ability to support Building Scene Layers is the key enhancement. Numerous other edits and additions to informative content are also provided in version 1.3.

2.2. Document contributor contact points

All questions regarding this document should be directed to the contacts provided below or the referenced standard editor(s).

Table 1. Contacts
Name Organization

Carl Reed

Carl Reed & Associates

Tamrat Belayneh

Esri

3. References

The following normative documents are new or updated references in the standard to which these Release Notes apply.

OGC: URL TO be added when I3S version 1.3 is published. OGC Indexed 3d Scene Layer (I3S) and Scene Layer Package Format Specification Version 1.3

4. Terms and definitions

This document uses the terms defined in Sub-clause 5.3 of [OGC06-121r9], which is based on the ISO/IEC Directives, Part 2, Rules for the structure and drafting of International Standards. In particular, the word “shall” (not “must”) is the verb form used to indicate a requirement to be strictly followed to conform to this standard.

For the purposes of this document, the following additional terms and definitions apply.

4.1. administrative change

change that does not alter the conformance abstract tests for any requirements

Note
An administrative change includes typographical errors, changes in wording to improve clarity or consistency, and perfunctory changes such as changes in version numbers.

4.2. critical Change

change that alters requirements in a way that is known to cause reverse compatibility issues

Note
There are no critical changes in OGC I3S Version 1.3

4.3. substantive change

change that alters requirements in a way that is not deemed to have a high risk for causing reverse compatibility issues

Note
The addition of Building Scene Layers is the major substantive change to I3S Version 1.3. The BLS addition does not chnage any of the existing requirements or class descriptions.

5. Change Log

5.1. KEY

  • Source:

    • CR - Formal Change Request

    • (Ed)itor - The Editor for the standard

    • (Is)sue - GitHub Issue

    • OGC-NA - OGC Naming Authority review

    • (Pu)blic - Public Comment period

    • (Su)bmission team - From the source specification as submitted by the Submission Team, usually for a Community Standard.

    • SWG - Approved decision by the Standards Working group (SWG)

    • User - The standard’s User Community

    • Other

  • Identifier: Change Request number or issue number and pull request/commit in GitHub

  • Type:

    • A=Administrative

    • S=Substantive

    • C=Critical

See Description of Critical Changes for more information on critical changes and Description of Substantive Changes for more information on substantive changes.

  • Section: Section number in the updated document

  • Description: Brief text describing the change

  • Purpose: the reason for the change:

    • Clarity

    • Consistency

    • Enhancement

    • Interoperability

    • Perfunctory

    • Readability

    • Usability

    • Change Request

Note
All of the new classes identified below are optional! Further, new properties added to existing classes are also optional. All of the 1.1 classes, properties, and capabilities are included in version 1.3. This is for backwards compatibility. The majority of the new (optional) classes must be implemented to support the new major enhancements as identified in the Substantive Changes section of this document.

5.2. Change Table

Table 2. Change Log
Source Identifier Type Section Description Purpose

Editor

NA

A

New Cover Page

Change cover page to reflect Version 1.3

Consistency

Editor

NA

A

All sections

Change 1.2 references as needed to version 1.3

Consistency

Editor

NA

A

Clause 1 - Scope

Added Building Scene Layer content and updated tables.

Enhancement

Editor

NA

A

Clause 4

Added definitions for bin size and vertex attribute

Enhancement

Editor

NA

A

Clause 6 - informative

Added Building Scene Layer content and updated tables.

Enhancement

Editor

NA

A

Clause 7 - normative

Added Building Scene Layer content to tables.

Enhancement

Editor

NA

A

Clause 7 - normative

Added more informative text on textures and texture compression.

Clarity

Editor

NA

A

3Dobject_ReadMe.adoc

Fix typos and some URLs.

Readability and fix link error

Editor

NA

A

3DNodeIndexDocument.cmn.adoc

lodSelection property is now mandatory. This property was previously optional in earlier versions. This was a documentation error.

Correct error.

Editor

NA

A

3DSceneLayer.cmn.adoc

geometryDefinitions: This property was optional due to typo. Should be mandatory (which it now is).

Correct error.

Editor

NA

A

3DSceneLayer.psl.adoc

geometryDefinitions: This property was optional due to typo. Should be mandatory (which it now is).

Correct error.

Editor

NA

A

drawingInfo.cmn.adoc

Add more informative content to the description. Removed link to Esri renderers and added inline examples of renderers.

Readability and clarity

Editor

NA

A

drawingInfo.pcsl.adoc

Add more informative content to the description.

Readability and clarity

Editor

NA

A

elevationInfo.adoc

Add more informative content to the description.

Readability and clarity

Editor

NA

A

featureAttribute.cmn.adoc

Added link to geometryFaceRange for more information on faceRange property

Readability and clarity

Editor

NA

A

geometryColor.adoc

Added link to sRGB page on Wikipedia.

Readability and clarity

Editor

NA

A

geometryNormal.adoc

Added mathematical definition for `normal".

Readability and clarity

Editor

NA

A

featureData.adoc

Rewrote the description.

Readability and clarity

Editor

NA

A

lodSelection.cmn.adoc

Add more informative content to the description and fixed ambiguous wording.

Readability and clarity

Editor

NA

A

slpk_hashtable.cmn.adoc

Added definition for associative array.

Readability and clarity

Editor

NA

A

texture.cmn.adoc

Added more descriptive content. Also added content about use of KTX (Basis Universal).

Readability and clarity

Editor

NA

A

textureSetDefinitionFormat.cmn.adoc

Added some descriptive text. Added text on support for Khronos KTX texture compression.

Readability and clarity

Editor

NA

A

value.adoc

Added more informative text in the description.

Readability and clarity

6. Description of Critical Changes

There are no critical changes in this release.

7. Description of Substantive Changes

7.1. Addition of Building Scene Layers

A Building Scene Layer is a 3D representation of a building model. A building model may be derived from 3D construction content, such as BIM data, or from a relational database model that contains 3D spatial information. The I3S BSL capability is designed to model the organization of construction data and groups content into standard engineering disciplines. Content in a BSL may represent a partial building, an individual building, or multiple buildings on a campus.

BIM encapsulates best-practice processes in the Architectural Engineering and Construction (AEC) industry to capture virtual (typically in 3D) representations of real-world assets that are commonly used for construction, documentation, and evaluation. BIM processes are applied in multiple domains including architecture and buildings, energy and utilities, or transportation and are typically captured across the lifecycle of an asset.

A BSL layer captures and optimizes BIM data and is typically sourced from formats/standards such as Autodesk Revit, Industry Foundation Classes (IFCs) or Geodatabase Feature data. The I3S BSL enables a user to efficiently share building 3D data for usage on the web, mobile devices as well as desktop platforms. The I3S BSL capability supports visualization and interactive analysis such as view shade analysis or efficient exploration of the many layers of content associated with a BIM model.

An I3S Building Scene Layer also encapsulates the semantic structure of the information in the building model while capturing geometry and attributes that can be used in an application. The BSL captures standard AEC disciplines such as Mechanical, Architectural, Piping, Electrical, and Structural. Within each discipline, a BSL groups category layers containing 3D objects representing assets of the building such as doors, windows, pipes and walls. The assets can contain attributes that directly reflect standard and user defined metadata that are stored in the source BIM content or other 3D data source.

Note
The BSL capability to the I3S 1.3 standard is contained in the addition of a number of new classes (normative) including the BSL Scene Layer Profile and informative content to the OGC 1.2 I3S Standard. The BSL extension did not result in changes to any of the existing 1.2 classes.

The following classes are added to the OGC I3S version 1.3 in support of Building Scene Layers:

  • BSL_ReadMe.adoc - Entry point and introduction for I3S Building Scene Layers

  • layer.bld.adoc - 3DSceneLayer profile for Vuilding Scene Layers

  • sublayer.bld.adoc - This class defines the sublayers of a Building Scene Layer.

  • subLayerModelName.adoc - Model names allow clients to identify entities of a building without having to rely on a specific name of a category layer, for example.

  • stats.bld.adoc - Define statistics for all building scene layer sublayers.

  • attributestats.bld.adoc - Concatenated attribute statistics.

  • filter.bld.adoc - Specify rules for display of content in a Building Scene Layer

  • filterBlock.bld.adoc - A filter block defines what elements will be filtered with a specific filter mode.

  • filterMode.bld.adoc - Filter mode represents the way elements draw when participating in a filter block.

  • filterModeSolid.bld.adoc - Based on rules in filter, display as "solid" if specified.

  • filterModeWireFrame.bld.adoc - Based on rules in filter, display as "wireframe" if specified.

  • filterAuthoringInfo.bld.adoc - Authoring Info used to generate user interface for authoring clients.

  • filterBlockAuthoringInfo.bld.adoc - The filter authoring info object contains metadata about the authoring process for creating a filter block object.

  • filterTypes - The file authoring information for a filter, including the filter type and its value settings.