Zombie Game Map?

Hello im trying to make a zombie game kinda like DayZ or WarZ but and a want to add a map like in those games where it shows the location of city's and your location but its not a mini-map. Does any one have a script that I could use, or a tutorial, or explain. Also I only have a moderate knowledge of C# so if you have a script having it in C# would help. Please help me.