UPlan is a simple rule based urban growth model intended for regional or county level modeling. Originally conceived by Prof. Bob Johnston, it has now been programmed by a long list of folks. Currently UPlan is being maintained by Nathaniel Roth and under the direction of Michael McCoy at the Information Center for the Environment, UC Davis.
Simple Version of how UPlan Works.... The needed space for each land use type is calculated from simple demographics and assigned based on the net attractiveness of locations to that land use (based on user input), locations unsuitable for any development and a general plan that determines where specific types of development are permitted.
The most recent version is: 2.64g Released 08/11/2008
Bug Reporting or Feedback: firstname.lastname@example.org