old B3dm format ?

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

How is the B3DMs in valid according to specs ?

**File \NewYork\1\0\1.b3dm **

Highlighted BYTE 0x14 - 0x18 should be batchTableJSONByteLength ?

Is this old format ?

2. A minimal code example. If you’ve found a bug, this helps us reproduce and repair it.

3. Context. Why do you need to do this? We might know a better way to accomplish your goal.

4. The Cesium version you’re using, your operating system and browser.

1.b3dm (153 KB)

I haven’t looked too deeply at this tileset, but it is possible that the spec has been modified since I think it was created before 3D Tiles was an OGC community standard.

You could try uploading the source CityGML ( to your ion account and get a new tileset from Cesium ion.