Terrain demo data

Hi there! Where can I find any free demo terrain links (the urls for TerrainProvider) for testing? Or How can I generate it by myself? For example, I need terrain data with one small area.

Try this.

And read my artcle this

@ZhefengJin Thanks!

I have another question.
I have generated some terrain data and after that I created a terrain provider with my generated data.
How can I get the area coordinates from the terrain provider?
I want to know where my terrain area is located.

The way Cesium ion does it is by capturing the bounding rectangle from the source data, and saving that before tiling it.

What format is the source data for your terrain?