Exporting Tree collision with heightmap

Hello,

I am looking at using terrain data from a unity scene, exporting it and reading it in with another system.

The catch is, I need to also export the tree collision height/width with the terrain heightmap as well.

Could this be done? it doesn't have to be mega accurate, but if I could 'lift' the heightmaps to the near tops of trees in those areas it would help a lot with my issue.

Anyone ever tried this? Or think its even possible?

Thanks