To make it simple: I would like to have a real world map with a proper scale in Unity.
Goal:
My goal is to have a map like in Heart of Iron IV. But I want to make it really precise with a scale for calculating travel time for units. I also want to apply a zoom (and if it's possible, when I zoom to a certain value change the map to a detailed map with roads, etc...).
Heart of Iron IV map:
What i planned to do:
I planned to take a map on internet, put it in Photoshop and make some separate parts of every country. But I don't know if it's the best way around. Because i also planned to make some smaller maps, like a single country.
What I tried so far:
I tried Using google map API, but I don't think it's the right tool for a unity game. I searched for softwares that can create precise maps. I went trough forums to check how smart people would go about this.
But I still don't know what to choose...
Conclusion:
I want a precise world map. I want to be able to make a zoom system able to change the details on the map. I want a scale on it, like 1km = 1 Unity unit (i don't remember what unity metrics are for 2D).
So what would be the best way around this ?
Thanks for your time (and sorry for my english).