My Entity height data is sea-level, but Cesium thinks in height above ellipsoid.

CesiumJS
1

Hello,

I've noticed a disagreement between my height data in my CZML (sea level values) and the calculated (interpolated) height reported at runtime ( I see the runtime values by attaching a listener and watching the Entity position change as the Entity travels).

So, we know that height is taken as height above ellipsoid ( see http://cesiumjs.org/Cesium/Build/Documentation/Cartographic.html ), and that the ellipoid does not necessarily follow sea level.

Question: Do I need to attach a terrain provider to correct this problem?

Thanks !

2

I posted a similar question a while back. This may help

http://cesiumjs.org/forum.html?place=topic%2Fcesium-dev%2FXz6_FnCuGNA%2Fdiscussion

3

I found that discussion, which is very good. Thanks. The title is "CesiumTerrainProvider V VRTheWorldTerrainProvider Heights"

Thanks Aaron!

4

Links to posts don’t work if you use the cesiumjs.org domain, though I see that tho managed to find it anyways. That’s why instead of going to http://cesiumjs.org/forum.html I goto https://groups.google.com/forum/#!forum/cesium-dev instead as making links from there actually work.

This just leads to main forum page

http://cesiumjs.org/forum.html?place=topic%2Fcesium-dev%2FXz6_FnCuGNA%2Fdiscussion

This is what google groups gives as a link

https://groups.google.com/d/msg/cesium-dev/Xz6_FnCuGNA/g

Then it changes to this form once entered

https://groups.google.com/forum/#!msg/cesium-dev/Xz6_FnCuGNA/g

I tried removing the last character on the link but it wouldn’t work anymore.

5

I tried changing all the %2F to forward slashes
http://cesiumjs.org/forum.html?place=topic/cesium-dev/Xz6_FnCuGNA/discussion

But it still didn’t work.