I’m encountering an issue while uploading an ASC file to Cesium Ion. The error message states, “Missing or invalid spatial reference system.” The file contains elevation data but seems to lack the spatial reference information required for georeferencing.
Here is the header of my ASC file:
449.77975 449.75098 449.70349 449.65601…
Can anyone provide guidance on how to correctly specify the spatial reference system and units in the ASC file’s header for compatibility with Cesium Ion?
Any help would be greatly appreciated.