BGDIINF_SB-2980: add GeoJSON and KML layer components for 3d

[vladyslav-tk]

Test link

[vladyslav-tk]

@pakb I added the KML layer component to this PR because it has related changes

[pakb]

I've some comment regarding the code, but my biggest concern is that it is not up to standard on the rendering side.

Here's what it looks in 2D

And here is the same place after a switch in 3D

I don't mind that labels are not rendered (although they should), but I will not accept that the numbers and "pills" are clipped by the terrain, we have to find a solution to this.

[vladyslav-tk]

@pakb

I don't mind that labels are not rendered (although they should)

for cesium, we use predefined style resolution. Currently, it is set to 100 which is why labels are not shown, I will update it

I will not accept that the numbers and "pills" are clipped by the terrain, we have to find a solution to this.

There are a few points about this

1. New terrain has problems with some tiles, and initially, points can be placed wrong
2. Cesium works like this, in some cases points will be cut by terrain anyway. It works the same in the current geo.admin
   
   
3. Only way to always show points is to use disableDepthTestDistance but in this case, it will be visible throw the terrain
   
   

[vladyslav-tk]

@pakb I added disableDepthTestDistance and set it to 75km, please test. Should we keep it like this, adjust the distance, or remove it?

[pakb]

@pakb I added disableDepthTestDistance and set it to 75km, please test. Should we keep it like this, adjust the distance, or remove it?

I think it's a good enough solution, you can go with this idea (just need to move the 75km into the config and explain what it is)
Thanks!

[pakb]

🚀
I found some interesting discussion on the Cesium forum, with some solutions regarding terrain clipping with Billboard and Labels, looking good!