Very, very impressive. This must indeed have taken a lot of hours to finish! Have some reputation. Really like the layout of the cities and the vibrant colors. The smaller houses on the outside, the bigger near the centre. You have some beautiful fields as well.

Will look at it later today to see if I can give any suggestions for future maps.
Only thing sticking out at the moment: there's not enough roads to my liking. There's a lot of green (grass?) showing between the houses and that isn't very realistic. With lots of people traveling grass would become dirt very quickly.
I just noticed Gamerprinter offered the same suggestion.