Test Py3DTilers behavior with degree projections

[LorenzoMarnat]

Py3DTilers was mostly (only?) tested with metre projections. We should test Py3DTilers behavior with degree projections. We should ensure:

• The coordinates are correctly writen in the tiles
• The transform matrix of the tiles doesn't distort the tiles positions. If it does, see Make transform matrix in tiles optional #133
• The transformation tools (--offset, --scale, --crs_in/out) can be used
• The rotation is correct. If not, see Option to rotate the output 3D Tiles #134

[clementcolin]

In other terms, when input is given in degrees, first transform coordinates to cartesian (use proj4 library), realise all computations in cartesian and eventually and optionnaly (because this depends on the desired coordinate system of the outut) reconvert the coordinates to degrees.

[andreiveselov]

There is also an issue with US State Plane coordinate systems that uses US Survey feet as units. I tried to use ObjTiler to create 3D tiles and height of objects in the mesh is not shown correctly in Cesium (~3 times higher). Any suggestions on how to address it?