Indoor Mapping Data Format

OGC Community Standard

    Last update: 2020-09-09

    Submission Date: 2020-07-23

    Approval Date: 2021-02-02

    Publication Date: 2021-02-18

    Internal reference number of this OGC® document: 20-094

    Version 1.0.0

    Category: OGC® Community Standard

    Copyright Notice

    Copyright© 2021 Apple and Open Geospatial Consortium

    This document is an OGC Member endorsed international Community standard. This Community standard was developed outside of the OGC and the originating party may continue to update their work; however, this document is fixed in content. This document is available on a royalty free, non-discriminatory basis. 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.


Indoor Mapping Data Format (referenced throughout this document as "IMDF") provides a generalized, yet comprehensive model for any indoor location, providing a basis for orientation, navigation and discovery. In this release there are also detailed instructions for modeling the spaces of an airport, a shopping mall, and a train station.

This release also has an extension model which enables a venue, organization, or even an industry to create valid features and validations not available in the current specification for private or public use

Developers can access both text and visual examples of all features, along with clear explanations of all terms. IMDF conforms to RFC 7946, ensuring compatibility and transferability of the data. IMDF is lightweight, mobile friendly, and can be rendered on any device, OS, or browser.

For GIS and BIM specialists, there is support for IMDF in many of your favorite tools.

IMDF maps integrated with indoor positioning can establish the foundation for a wide range of consumer and enterprise location-based apps and websites.

Learn more about integrating IMDF, MapKit and CoreLocation.

Learn more about the Indoor Maps Program.

IMDF Terms of Use

Questions about the spec?

For the latest version of the IMDF spec from Apple, please go to:


The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", “SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119.

IMDF describes the content and characteristics of an archive. This includes the data, non-functional requirements, and other factors necessary to provide Organizations and other interested parties with a complete and comprehensive description of the expected condition of an archive at the time of ingestion. IMDF does not detail the guidelines for the production of the data itself.

Feature Types