I have a issue on getting the height data offline mode.
I am able to get the height from terrain provider with online but.
I need to get it offline mode. So, how can I solve this?
You’ll need access to an offline terrain provider.
Cesium has a few paid options for this. If you are interested, contact firstname.lastname@example.org.
Otherwise, you will need to find another service which locally serves terrain data in the quantized mesh or heightmap format.
You can check out here