Procedural Terrain Merge

I have terrain split into 200x200 squares, however the terrain does not meet up on the edges, how do i fix this?

Either you import a tool from the asset store called terrain stitch or smt. It’s pretty good and does exactly what you’re asking for and some. Or, if you don’t want to pay, you need to make sure the ends of the terrains match up with its neighbouring terrains, so it looks perfectly stitched.

You can do this by modifying the heightmap data. It’s a struggle, but I’ve done it before. Let me know if you want the script @TempleStudios