Questions about maps

[Zal]

Sorry if these questions may have already been all answered. I am new here and don't know where to start. So I am trying to develop an alternative world with an altered take on our world's history and such. Now I want to start first with maps at least. I need a high resolution type of map and also a way to easily re-border. Is there any program that can move around the borders? I understand there is Paint and the like but I am asking for something that is designed to move borders around since I have a hard time getting things exact. Also I want a pretty nice looking map and the ability to paint in the flag colors easily.

Such as this, which is what I want:

 

[Yanranay]

Are you looking for something like this? You can easily do flags by cutting out the parts you want and adding the flag as a separate layer behind it.

 

[Zal]

Are you looking for something like this? You can easily do flags by cutting out the parts you want and adding the flag as a separate layer behind it.

That is close. Thank your responding by the way.

It has too many rivers and terrains IMO. I would like something in the vein of my posted image. Something not so rough. I appreciate it though anyways. And by cutting out the parts I guess I understand that quite well now.

 

[Falkanner]

Vector-based programs like Illustrator and Inkscape are what you want if you want to just click and drag borders. I think Paint.net will also give you some degree of control over curves, but not after you've placed them. As for the flags, I can't help you there, since I've never really tried that technique.