- A concise explanation of the problem you’re experiencing.
We’re seeing gaps / rifts on the map when using our Heightmap terrain data at various places:
This particular gap seems to be on the edge of a basemap tile.
Additionally, we see some undulations on the map as well using the same terrain data:
This is strange to us, because our Heightmap terrain data has a resolution of 7.5 arcseconds, which seems far too coarse to produce such detailed changes in elevation as seen above. Additionally, our terrain only goes to a max zoom level of 10.
Both of the above issues seem to occur all over the map, not necessarily on terrain tile boundaries (the above two images occur right in the middle of a terrain tile).
Does anyone know what could be causing these issues? is it related to the fact that we’re using Heightmap terrain data?
- A minimal code example. If you’ve found a bug, this helps us reproduce and repair it.
I can’t supply a Sandcastle example, but from similar posts I’ve seen this is sometimes a loading-related issue (i.e a gap will appear, but will be covered up once the tiles fully load). In our case, it doesn’t seem to be a loading-related issue, as the rifts / undulations seem to persist even after tiles have loaded.
- The Cesium version you’re using, your operating system and browser.
We see this behavior in the latest Cesium versions (I’ve tried 1.54 up to 1.56.1).