Hello all! I'm working on global map for my Crimean war mod. I want to make the map accurate, so I downloaded 3d mesh of Sevastopol area from Google maps to use it as global map. But the Google's mesh consists of many separate rectangles (each of which also consists of 4 separate rectangles), which can't be combined in one mesh perfectly, most of vertices of adjacent rectangles don't match. Here is an example:
So my question is, is there a way or to combine all those meshes into one without losing much of shape (and which can be seen by the game's engine as global map), or to make another mesh on top of these rectangles, which will in general replicate the form of all those meshes?