Atlanta
Baltimore
Chicago
Denver
Detroit
Florida
Liverpool
Los Angeles
Lyon, France
Miami
Milton Keynes, England
New York City Boroughs
North Rhine Westphalia, Germany
Paris, France
Pittsburgh
Portugal
San Francisco
Santa Monica
Seattle
Seville, Spain
Taiwan
Tallahassee
United Kingdom
Washington D.C.
The use of thick black strokes in the iconography drove the decision to maintain that pattern in the illustration, and I made it a rule to always keep line weights consistent in each piece, even if sometimes the line thickness itself changed. Perspective, generally speaking, was ignored to maintain simplicity.
The only time line thickness in a piece was altered was with the application of pattern, usually thin diagonal lines or dots.