2004 UC Proceedings Abstract
Assessing Housing Growth When Census Unit Boundaries Change Track: Census and Geodemographics Author(s): Jason McKeefry, Sherry Holcomb, Volker Radeloff, Roger Hammer, Jeremy Fried, Susan Stewart Urban sprawl is a major problem in conservation and land use planning making detailed spatial data important for both science and management. The U.S. Census Bureau data and TIGER/Line files provide detailed information about housing units. However, up to 60 percent of census blocks changed boundaries between 1990 and 2000 making it difficult to assess change from one decade to another. We compared three techniques to derive a common geography between 1990 and 2000 census blocks and used these to map housing growth in Oregon as an example. Without pre-processing, areas showing increases in housing units had a total increase of 411,000 houses accompanied by a total decline of 152,000 houses. Most of this decline is likely caused by incompatible geography. More sophisticated pre-processing methods reduced declines to about 54,000. This highlights the need for advanced GIS algorithms when analyzing sprawl based on census data. Jason McKeefry University of Wisconsin, Madison Forest Ecology and Management 120 Russell Labs, 1630 Linden Dr. Madison , WI 53706 US Phone: 608-261-1050 Fax: 608-262-9922 E-mail: jfmckeefry@wisc.edu Sherry Holcomb University of Wisconsin, Madison Forest Ecology and Management 120 Russell Labs 1630 Linden Dr. Madison , WI 53706 US Phone: 608-261-1050 Fax: 608-262-9922 E-mail: ssholcomb@wisc.edu Volker Radeloff University of Wisconsin, Madison Forest Ecology and Management 120 Russell Labs 1630 Linden Dr. Madison , WI 53706 US Phone: 608-263-4349 Fax: 608-262-9922 E-mail: radeloff@wisc.edu Roger Hammer University of Wisconsin, Madison Rural Sociology 350 Agricultural Hall 1450 Linden Dr. Madison , WI 53706 US Phone: 608-263-2898 E-mail: rhammer@facstaff.wisc.edu Jeremy Fried USDA Forest Service PNW Research Station Environmental Analysis and Research Team P.O. Box 3890 Portland , OR 97208 US Phone: 503-808-2058 Fax: 320-215-2731 E-mail: jeremy.fried@fs.fed.us Susan Stewart USDA Forest Service R&D North Central Research Station 1033 University Place, Suite 360 Evanston , IL 60201 US Phone: 847-866-9506 Fax: 847-866-9506 E-mail: sistewart@fs.fed.us |
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