A series of maps easily shows the sequence of the process of a city forming,
How can a single map tell the story of how the city formed? older areas with expansion and infill in newer architectural forms etc... as well as a sequence of younger and younger "outer walls of the expanding city.
what sort of people would be the early adopters of urbanization? does this help you build a tension between utopian dreams and human weakness in your city's story? build the peaceable kingdom with lumber from the eye of the viewer of motes (not moats)