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You are here: Home / * PRESS / Business / OGC GeoTIFF Standard Working Group updates work items; public comment sought on new charter

OGC GeoTIFF Standard Working Group updates work items; public comment sought on new charter

January 21, 2021 By GISuser

GeoTIFF SWG is planning on minor and major revisions to the popular standard used for sharing geographic image data

Banner announcing the public comment period for the GeoTIFF SWG recharter

Contact: info@ogc.org 

21 January 2021: The Open Geospatial Consortium (OGC) seeks public comment on the draft updated charter for the GeoTIFF Standard Working Group (SWG), which introduces several new tasks for the SWG. Comments are due by February 11, 2021.

The Geographic Tagged Image File Format (GeoTIFF) specification, as an extension to the public domain TIFF format, has been used for sharing geographic image data successfully for years across many platforms and software environments. GeoTIFF defines a set of TIFF tags that describe the “cartographic” information associated with TIFF imagery originating from satellite imaging systems, scanned aerial photography, scanned maps, digital elevation models, or as a result of geographic analyses. 

The initial scope of the GeoTIFF SWG was to incorporate the GeoTIFF specification into the OGC standards suite by updating the specification to bring it into conformance with current OGC practices. The resulting Standard, GeoTIFF v1.1 was adopted as an OGC Community Standard in 2019. The original scope of the GeoTIFF also specified that the SWG would: provide a forum for evolving the standard in the future; maintain compatibility with existing geoTIFF community implementations and practices; and that future evolution would be done in close cooperation with the existing geoTIFF community.

As a result of that cooperation, the GeoTIFF SWG has updated its charter to include the following additional tasks to support the evolution of this popular standard:

  • GeoTIFF 1.2 – This task will address open issues which were out of scope for version 1.1 but not significant enough for a major revision. GeoTIFF 1.2 shall maintain backward compatibility with GeoTIFF 1.1.
  • BigTiff support – The TIFF file format uses 32 bit offsets. This limits TIFF files to four gigabytes. The BigTIFF format resembles TIFF but uses 64 bit offsets instead. GeoTIFF 1.1 will be extended to enable bigTIFF (in addition to TIFF).
  • Standardize Cloud-Optimized GeoTIFF (COG) – The COG community is willing to turn-over management of the COG specification to OGC. OGC shall establish a GeoTIFF/TIFF standard or best practice that fully documents the COG format in the manner of an OGC specification.
  • GeoTIFF / LAS harmonization – This task will examine the overlap between GeoTIFF and LAS. The deliverable will be recommendations on how to keep these two standards synchronized.
  • Data Cubes – This task will explore the potential of GeoTIFF to support analytics including coverages and data cubes.
  • GeoTIFF 2.0 – This task will examine issues which cannot be addressed within the scope of a minor update (GeoTIFF 1.2).

The draft GeoTIFF SWG charter is available for review and comment on the OGC Portal. Comments are due by February 11, 2021, and should be submitted via the method outlined on the GeoTIFF SWG re-charter public comment request page.

About OGC
The Open Geospatial Consortium (OGC) is an international consortium of more than 500 businesses, government agencies, research organizations, and universities driven to make geospatial (location) information and services FAIR – Findable, Accessible, Interoperable, and Reusable.
OGC’s member-driven consensus process creates royalty free, publicly available geospatial standards. Existing at the cutting edge, OGC actively analyzes and anticipates emerging tech trends, and runs an agile, collaborative Research and Development (R&D) lab that builds and tests innovative prototype solutions to members’ use cases.
OGC members together form a global forum of experts and communities that use location to connect people with technology and improve decision-making at all levels. OGC is committed to creating a sustainable future for us, our children, and future generations.
Visit ogc.org for more info on our work.

Related Articles on GISuser:

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  • KML Earth browser standardOGC® seeks comment on the OGC OWS Context GeoJSON Encoding Standard
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Filed Under: Business Tagged With: OGC, standards






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