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geo-data / cesium-terrain-builder

A C++ library and associated command line tools designed to create terrain tiles for use in the Cesium JavaScript library
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Tile coordinates are not consistent with Google or TMS standard #98

Closed predictwise closed 3 years ago

predictwise commented 3 years ago

Hey @homme,

Thanks for your great work!

I am confused that the coordinates of generated tile are quite different from the Google standard or TMS standard. For example:

Tile(x=69555, y=54636, z=16) is what I got from this tool. However, the corresponding tile coordinates in Google standard are Tile(x=69555, y=38016, z=17) + Tile(x=69555, y=38017, z=17).

Or Tile(x=69555, y=93055, z=17) + Tile(x=69555, y=93054, z=17) in TMS standard.

In addition, each tile generated from cesium-terrain-builder looks like a rectangle rather than a square. But tiles using Google standard or TMS standard are all squares.

I would like to know how to convert the tile coordinates to those using Google standard or TMS standard. Thanks a lot.

Oliver