Justin Cozart's been busy updating the Dallas Urban History page on Flickr, and among his recent finds is this 1945 map created for the Dallas City Plan Commission (speaking, as we were earlier, of city planning). Writes Justin, it shows "areas of urbanization in the city and certain obstacles to development. The main thrust of the sprawl began to move north, rather than south, in this year and has not abated since." Justin's clearly been going through his grandfather's stash again. All my grandfather left me was his straw cowboy hat and a box of Republic National Bank receipts from 1948 through 1951.