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The Mapbox Vector Tile specification provides these definition for projection and bounds. A Vector Tile represents data based on a square extent within a projection. A Vector Tile SHOULD NOT contain information about its bounds and projection. The file format assumes that the decoder knows the bounds and projection of a Vector Tile before decoding it. Web Mercator is the projection of reference, and the Google tile scheme is the tile extent convention of reference. Together, they provide a 1-to-1 relationship between a specific geographical area, at a specific level of detail, and a path such as https://example.com/17/65535/43602.mvt. Vector Tiles MAY be used to represent data with any projection and tile extent scheme. It is possible to encode and write vector tiles in different CRS than EPSG:3857. The implementation used the CRS bounds to defined the tile 0 top left coordinates and the scale denominator for 0 zoom level.