Our point cloud tiler first checks for a WKT VLR (record ID = 2112). If a WKT VLR doesn’t exist, the tiler manually checks for GeoTIFF keys (record IDs = 34735, 34736, 34737) to reconstruct the WKT.
- 2112 = OGC Coordinate System WKT
- 34735 = GeoKeyDirectoryTag
- 34736 = GeoDoubleParamsTag
- 34737 = GeoAsciiParamsTag
See this documentation for more on these VLRs: http://www.asprs.org/a/society/committees/standards/LAS_1_4_r12.pdf
Here is some more information on WKT vs. GeoTIFF keys for point clouds: LAS Reading and Writing with PDAL — pdal.io
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