Hello, I’m developer of JapanGSITerrainProvider.
Japan GSI (Geospatial Information Authority of Japan) provide height as “above sea level” in their ground height tile service,
so in my library, I pass it’s value directly to TerrainProvider, so my library is worked on “above sea level”.
But I found this description in Cesium’s reference:
“The height, in meters, above the ellipsoid.”
According to this, all height values must be given by above the ellipsoid…
I should get geoid data from somewhere and convert “above sea level” to “above the ellipsoid”?
Or, any switch to do it automatically in parent TerrainProvider class side?