Is there a guide or overview on how to make a map?

[Jazzepi]

Does anyone have a good idea on how to remove provinces? I went to remove some provinces from a map, so I erased the white dot at the center of two of the provinces, and just joined them up together by creating a new white dot in the center of the two.

I did not edit the map file, however, and then I opened up the map in the map editor. All the province connections are crazy now. I was hoping there would only be a few problems restricted to a select number of provinces, but the entire map is basically borked.

So is there a better way to go about removing a province from a map that has already been created?

Jazzepi