Heightmap quality

[Clivey]

I am getting a heightmap, but it appears to lacking a lot of detail in smaller areas where there is a height difference. I know its not City Skylines as when i was using Terrain.party, the height map was just fine, but this one appears to be lacking a massive amount of detail.

Is there a way we can get the co-ordinates of our selection (the boundary box), so we can get a better heightmap from elsewhere?

This is what I get for Sittingbourne UK, everything is pretty much flat. I got the coastline ok, but anything inland is flat. Terrain Party never had the issue, so am wondering if your using a difference service for the heightmap?
after import
https://www.linkpicture.com/q/Sittingbourne-UK.png

This region in the UK
https://www.linkpicture.com/q/Sittingbourne-UKgrab.png

[Patryk]

I'm not developing this software anymore, just hosting it. I will however merge any pull requests, so please create one if you can.
Thanks