We’ve been using cesiumjs for several years (since the beginning of the Cesium 1.x versions), and we’re very excited about all that is happening with the product! However, one of the big attractions to Cesium was that it was open source and free. I work for a very small company that pushes hard for us to find very inexpensive solutions.
**I recognize that there is definitely value in what Cesium offers, and I’m sure the new Cesium World Terrain will be extremely quality data. But I’ve been tasked to investigate options for alternate terrain sources that are free or to define what it will take to “create” and host our own terrain data. **
One of my biggest challenges is that I don’t really understand what the specs/requirements are for terrain data to be used by Cesium. I’m also extremely interested in all of the “clamp to ground” capabilities that are being discussed and worked on, and I’m unclear if the only way these features will be supported is by using the new Cesium World Terrain data.
I have experimented with the “VRTheWorldTerrainProvider” and the various terrain data sets available from VT MAK / VR-TheWorld. However, everything I’ve tried with this terrain data results in objects the should be “clamped to ground” moving significantly when the globe is tilted. I’ve read several posts in the forums about this, but there does not seem to be a good solution (at least none I could find).
So I would very much appreciate if someone would be willing to define/discuss:
- What options exist after September 1, 2018 for us to host our own terrain data and not lose the benefits of upcoming “clamp to ground” capabilities?
- Where I can find specific “how to” information for creating terrain tile sets that can be used in/by Cesium?
- What are the specs/requirements for the terrain tiles?
- I’ve read a little about the STK Terrain Server. Will it still be a valid option? Will upcoming “clamp to ground” capabilities be supported if we go this route?
Any other suggestions related to these goals.
Thank you in advance for any help with this!