Trajectory is under the ground

CesiumJS
1

Hi, I migrated from GE to Cesium and I have few cases where is trajectory under the ground.
I send request to support of AGI, but they said it's not their responsibility.
You can view error here:
https://skyderby.ru/tracks/5489/globe

You can view here:
https://skyderby.ru/tracks/5489/map
with satellite view that trajectory starts from the top of the mountain.

Can you please help me with this issue? Especially this location is very important.

2

In some locations it works pretty good, i.e.:
https://skyderby.ru/tracks/7237/globe

3

Hello,

Unfortunately, we don’t currently have support for rendering polylines on terrain. It’s something we’re working towards, but it’s a pretty difficult problem to solve and we need to do some research to figure out the best way to accomplish this without affecting performance.

It looks like your data has heights baked into it though, which is a good thing. As a workaround for now, you can try setting viewer.scene.globe.depthTestAgainstTerrain = false

This should make the polyline always draw on top of the terrain.

Best,

Hannah

4

Hello, Hannah,

Thank you for your reply! It was helpful to me.
In that app logged gps tracks from base jumping, so start of the track is alway close to terrain and can be used to improve terrain data. Also I can ask base jumpers to share laser dimensions of tops of mountains and cliffs (it is less than 1m accuracy).

5

Yeah, that’s a really cool application! Base jumping is incredible, I can’t believe people do that. Thanks for sharing =)

-Hannah