I want to draw a map of some districts of town. So I drew different polygons, one for each district. I saved each polygon in its own kml. The districts obviously share a lot of boarders.
Let me illustrate my question with this example, I make it up, it's just to understand:
I am finished with drawing the neibhouring states of the red state. Each neibhouring state has its own polygon as kml. Now, it takes a lot of time to draw the red state in between (in this case especially the northwestern boarder).