I decided to use google to define “post modern” and the result:

Definitions of post modern on the Web:

[1925 – 1980 AD] departure from generalized style into individual expression through innovative use of new building technology and materials to differentiate the structure, space and experience from all previous styles. The Guggenheim Museum by Frank LLoyd Wright exemplifies the flambouyant deviation from all previous architectural movements.
www.seemydesign.com/livingroom/elementsideas/archtrim/architectstyle.htm
Related phrases: post modern design

Replace “architectural” with cartographic, and ya got it. Also, I was born in 1980, the year post modern is said to have ended, but I definitely think that definitiom describes my maps nicely…..a 25 year delay ain’t bad.