Tile matrix set candidate standard

July 4th, 2018, Published in Articles: PositionIT

The OGC seeks public comment on the Tile Matrix Set candidate standard, which decouples the concept of a tile matrix set from the WMTS standards so that any standard or application that requires the use of a tile matrix set can reference the concept directly. A tile matrix set defines a tile indexing pyramidal system to allow easy retrieval of the appropriate tiles by a mapping service. In a tile matrix set, a tile can be uniquely identified by a tile column, a tile row, and a tile matrix identifier. A tile matrix set is useful across many applications for sharing geospatial information.

In 2007, OGC approved and released the Web Map Tile Service (WMTS) standard, with WMTS 1.0 providing a definition of a tile matrix set. Over time, other OGC standards dealing with tiles in other ways needed to use the same definition. Unfortunately, these standards could not use the definition independently because the definition was formally linked to the tile service and was limited to an XML encoding.

This candidate standard also adds an informative list of commonly used tile matrix sets with XML and JSON schemas and examples. A future tile matrix set standard is anticipated to impact revisions of other OGC standards such as GeoPackage and the next version of WMTS. The candidate Tile Matrix Set standard is available for review and comment on the OGC Portal. Comments are due by 26 July.

Contact OGC, info@opengeospatial.org

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