Extracting WGS84 coordinates from tileset.json file

[beno...@gmail.com]

1. A concise explanation of the problem you're experiencing.

Hello everyone,

I'm using tilers from the enterprise package that Cesium offers. Tiling an asset (file) gives me a cesium 3dtiles dataset, as expected.

What I'de like to do is extracting bounding volume and center in WGS84 coordinates from the generated tileset.

When browsing 3dtiles specification I find that every node has a bouding volume (box in my case) matrix and a transform matrix. https://docs.opengeospatial.org/cs/18-053r2/18-053r2.html

My guess is that it should be possible with some calculations between those 2 matrices to obtain WGS84 coordinates about the center and region of the tileset.

The goal is to access location information about a tileset without loading the cesium viewer (wich occurs later in the app).

I think CesiumJS wrap the math somewhere, but I don't know exactly where to look.

Has anyone tried to do this ?

Any advice or idea ?

Thank you for the help !

P.S. :here is the location of these matrices in tileset.json files :

[Omar Shehata]

You can see the logic for how to compute the world location from the bounding volume here:

https://github.com/CesiumGS/cesium/blob/d48ac3ee47fd77c9f27297b833cbe88dd5aebfcc/Source/Scene/Cesium3DTile.js#L1158

Let me know if this helps.

[beno...@gmail.com]

Yes it helps, thanks !