best way To build terrain from Maps?

Hi I recently got into importing heightmaps for unity. The problem with that is that it requires a well defined .RAW files as well as photoshop (for conversion) and also has size constrains 4097 x 4097 px.

I am wondering if there is any other method of importing map data: ie: colour gradeint maps or such that is more suitable for larger scale mapping (to map the terrain on the city for example)

Or do people use another third party software to map it out and then import the terrain into Unity?

Also, how does stitching several small terrains work?

Thanks in advance. With heightmapping I have been running alot into performance issues as well as “pointy jagged” terrain: I need to reduce the height to something like 10 and then smoothen it out.

Let me first say that I am not an expert on this topic but rather, like yourself, someone who is interested in re-creating an existing environment in Unity as realistically and accurately as I can. There are a number of threads you should look through (some by .Tom and this one by Sjm Tech) for some ideas on how others are doing it.

Stitching several small terrains can be done with Stitchscape (available on the Asset Store).

–Eric