Cesium World Terrain Height issue

CesiumJS
1

Hi There,

I am trying to get height of buildings from “Cesium World Terrain” asset and I compared data
with Google earth for “Florida Center North, Orlando, FL, USA” area and there is difference in height from Cesium app and Google earth.

Height From Google Earth : 41 Meter
Height from Cesium app : 0.9766822972322785 Meter

I have create demo on Cesium sandcastle here

Note : You can see output in console.

Can you please check this issue?

Thanks

2

The height in CesiumJS is returned relative to the ellipsoid. The height in Google Earth is relative to mean sea level.

3

Hi Omar,

I work with Rakhi, who asked me to follow up on this. What we really need, I guess, is a way to convert the height relative to the ellipsoid to a height relative to sea level. Are you saying Cesium doesn’t provide that facility at all? (Seems like it should; there are probably a lot of applications that could benefit from it.)

If Cesium doesn’t support it, do you know of any third party software that works with Cesium to provide it? I found a package from the NGA that uses point data at 15 minute increments and a Fortran program to provide interpolations for arbitrary lat/lon points, but that may not be the optimal way to integrate sea level calculations into Cesium.

Thank you.