Illustrator, Photoshop or GIMP? Which is best for mapping?

[Voolf]

What are you using Voolf?

Most of the time Krita for drawing map and Inkscape to add labels in the end. The biggest flaw of Krita is very poor text editor.
I also have Affinity Photo which is great, but i have grown so fond of Krita, that it's hard for me to switch. I don't really need to at the moment.

[PSNick]

I personally prefer Photoshop simply because I'm more accustomed to it, but I have used GIMP for some specific things as well. Each of them has a few things they're exceptionally good at but you can easily pick one and stick with it as you should be able to do everything you need to create a map with either.

Features aside, adobe products can be expensive with their subscription (though it seems you already have one), whereas GIMP is free software.

I Illustrator can be used for things such as the Metro maps you have created, but you'll probably want to use raster graphics for something like city maps. It's not at all impossible to do with vectors, but I'd think it's more work and the result might end up looking a bit plain.