Hand drawn and illustrated maps are so fun to create! The bride who commissioned this map of Pittsburgh planned to include printed copies in her wedding invitation suite as a way to show her guests some of the area attractions, and also as a whimsical keepsake of the area. For reproduction purposes, this line drawing would work perfectly for letterpress printing, but washes of watercolor can be added to maps that are being digitally printed.
Fortunately for all us old married couples, you don't have to be planning a wedding to have a map like this made - I plan to make my own for all the areas I've lived in (quite a few!) and hang them as artwork in my home.... highlighting our favorite hang-outs, restaurants, etc.