You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
Section 18.104.22.168.1 Table Definition
The gpkg_tile_matrix_set table defines the spatial reference system (srs_id) and the maximum bounding box (min_x, min_y, max_x, max_y) for all possible tiles in a tile pyramid user data table. All tiles present in the tile pyramid SHALL fall within this bounding box. However, the bounding box MAY be larger than the minimum bounding rectangle around the actual tiles in that pyramid.
Section 22.214.171.124.2 Table Data Values
The minimum bounding box defined in the gpkg_tile_matrix_set table for a tile pyramid user data table SHALL be exact so that the bounding box coordinates for individual tiles in a tile pyramid MAY be calculated based on the column values for the user data table in the gpkg_tile_matrix table. For example, because GeoPackages use the upper left tile origin convention defined in clause Table Data Values below, the gpkg_tile_matrix_set (min_x, max_y) ordinate is the upper-left corner of tile (0,0) for all zoom levels in a table_name tile pyramid user data table.
The SWG determined today that we need to clarify the definitions. The extents in gpkg_contents should indicate the extents of the actual data in the layer and applications may use these extents as a default view. The extents in gpkg_tile_matrix_set shall indicate the extents of the tile matrix set itself.
The text was updated successfully, but these errors were encountered: