Community Standards

A Community standard is an official position of the OGC endorsing a specification or standard developed external to the OGC. A Community standard is considered to be a normative standard by OGC membership and part of the OGC Standards Baseline. The key consideration for a Community standard is that there must be strong evidence of implementation. OGC does not take over the maintenance of the work, rather a Community standard is a “snapshot” of a mature standard for which the originator has either shared the Intellectual Property Rights with the OGC or granted unlimited free use of the Intellectual Property to all implementers.

Community standards can serve two purposes:

  1. to bring de facto standards from the larger geospatial community to be a stable reference point that can normatively referenced by governments and other organizations; and

  2. to bring new, but implemented, standards to the OGC to form the basis for further refinement and development of interoperability between other OGC standards.



Document Title (click to view/download) Version Doc.# Editor Date
Zarr Storage Specification 2.0 Community Standard  2.0  21-050r1  Zarr Developers 2022-06-30

This Community Standard refers to the Zarr V2 Specification. The Zarr V2 Specification is hosted on the Zarr website at The Zarr V2 Specification is the OGC Community Standard. Everything that follows is a non-normative, informal description of Zarr usage written for the benefit of the geospatial community.

Work is underway on a Zarr V3 specification, which will include a mechanism for optional spec extensions. A new OGC Standard is planned to be filed for Zarr V3 in the future.

CityJSON Community Standard 1.0  1.0  20-072r2  Hugo Ledoux 2021-08-13

CityJSON is a JSON-based encoding for a well-documented subset of the OGC CityGML data model (version 2.0.0). CityJSON defines how to store digital 3D models of cities and landscapes. The aim of CityJSON is to offer an alternative to the GML encoding of CityGML, which can be verbose and complex to read and manipulate. CityJSON aims at being easy-to-use, both for reading datasets and for creating them. It was designed with programmers in mind, so that tools and APIs supporting it can be quickly built.

Indoor Mapping Data Format  1.0.0  20-094  Apple Inc. 2021-02-18

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

OGC OpenFlight Scene Description Database Specification 16.0 Community Standard  16.0  19-065  Steve Thompson 2020-07-09

This document describes the OpenFlight Scene Description Database Specification, commonly referred to as simply “OpenFlight”. OpenFlight is a 3D scene description file format that was created and is maintained by Presagis. While OpenFlight databases are typically created and edited using Presagis software tools, the format is widely adopted and as a result, many tools exist to read and write OpenFlight database files.

OGC® 3D Tiles Specification  1.0  18-053r2  Patrick Cozzi, Sean Lilley, Gabby Getz 2017-08-18
3D Tiles is designed for streaming and rendering massive 3D geospatial content such as Photogrammetry, 3D Buildings, BIM/CAD, Instanced Features, and Point Clouds. It defines a hierarchical data structure and a set of tile formats which deliver renderable content. 3D Tiles does not define explicit rules for visualization of the content; a client may visualize 3D Tiles data however it sees fit.
LAS Specification 1.4 OGC Community Standard  1.4  17-030r1  ASPRS 2018-03-01

The LAS file is intended to contain LIDAR (or other) point cloud data records. The data will generally be put into this format from software (e.g. provided by LIDAR hardware vendors) which combines GPS, IMU, and laser pulse range data to produce X, Y, and Z point data. The intention of the data format is to provide an open format that allows different LIDAR hardware and software tools to output data in a common format.

OGC® GeoRSS Encoding Standard  1.0  17-002r1  Carl Reed 2017-08-18
GeoRSS is designed as a lightweight, community driven way to extend existing RSS feeds with simple geographic information. The GeoRSS standard provides for encoding location in an interoperable manner so that applications can request, aggregate, share and map geographically tag feeds.
OGC Indexed 3d Scene Layer (I3S) and Scene Layer Package Format Specification  1.2  17-014r8  Carl Reed, Tamrat Belayneh 2021-12-15

The Indexed 3D Scene Layer (I3S) format is an open 3D content delivery format used to rapidly stream and distribute large volumes of 3D GIS data to mobile, web and desktop clients. I3S content can be shared across enterprise systems using both physical and cloud servers.

A single I3S data set, referred to as a Scene Layer, is a container for arbitrarily large amounts of heterogeneously distributed 3D geographic data. Scene Layers are designed to be used in mobile, desktop, and server-based workflows and can be accessed over the web or as local files.

The delivery format and persistence model for Scene Layers, referred to as Indexed 3d Scene Layer (I3S) and Scene Layer Package (SLPK) respectively, are specified in detail in this OGC Community Standard. Both formats are encoded using JSON and binary ArrayBuffers (ECMAScript 2015). I3S is designed to be cloud, web and mobile friendly. I3S is based on JSON, REST and modern web standards and is easy to handle, efficiently parse and render by Web and Mobile Clients. I3S is designed to stream large 3D datasets and is designed for performance and scalability. I3S is designed to support 3D geospatial content and supports the requisite coordinate reference systems and height models in conjunction with a rich set of layer types.