Public comment requested: OGC GeoPackage Extension for Tiled Gridded Coverage Data

Please note:  This Request is scheduled to close on 15 August 2021.
Open Date: 
Friday, 2021-07-16
Closing Date: 
Sunday, 2021-08-15

The Open Geospatial Consortium (OGC) seeks public comment on version 1.1 of the OGC GeoPackage Extension for Tiled Gridded Coverage Data (TGCE). 

TGCE defines how to encode and store tiled regular gridded data, such as a digital elevation model, in a GeoPackage. The tiles contain values, such as elevation, temperature or pressure, and the extension defines two encodings: PNG and TIFF. 

GeoPackage is an open, standards-based, platform-independent, portable, self-describing, compact format for transferring geospatial information. For a primer on the capabilities of GeoPackage, read the blog post: #GeoPackageDay 2020 - what is GeoPackage?

There are two substantive changes incorporated into the GeoPackage Tiled Gridded Coverage Version 1.1 extension. These changes do not impact backwards compatibility.

  • Support for additional data types in GeoPackage coverages, specifically: 8/16/32 bit signed integers; 8 bit unsigned integer (16-bit integer is currently supported, but only for PNG); 32-bit floating point (already supported in GeoPackage coverages); and 1 bit (e.g. as a binary mask).
  • Multiple channels in a GeoPackage Coverage can now be specified.

The release notes containing the full list of changes seen in version 1.1 are available at:


Comments can be submitted to a dedicated email reflector for a thirty day period ending on the "Close request date" listed above, Comments received will be consolidated and reviewed by OGC members for incorporation into the document. Please submit your comments using the following link: requests [at] (Click here to submit comments) The link provided above should include a standard template in the message body. If the preloaded message body does not work properly using your mail client, please refer to the following template for the message body: Comments Template


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