@article {johnson2011neogeographic,
	title = {Neogeographic tools to create open-access data: Mapping vacant land parcels in Detroit},
	journal = {URISA Journal},
	volume = {23},
	year = {2011},
	pages = {33{\textendash}38},
	publisher = {Urban and Regional Information Systems Association (URISA)},
	author = {Johnson, Peter A and Belblidia, Nora and Campbell, Stefan}
}
