Using a GIS for Real Estate Market Analysis: The Problem of Spatially Aggregated Data

John Clapp and Mauricio Rodriguez

Journal of Real Estate Research, 1998, vol. 16, issue 1, 35-56

Abstract: Many databases used for real estate market analysis are not available at the address level. For example, information on employment and unemployment may be available only for labor market areas; and Census data is typically tabulated for blocks or higher levels of spatial aggregation. A Geographic Information System (GIS) associates these spatially aggregated data with the geographical center of the area. This poses special problems when we use a GIS to evaluate linkages between supply and demand. This article presents some solutions to this problem; methods that are relatively easy to implement on a GIS are emphasized. A GIS can be used to calculate a theoretical average travel distance to the population in the geographical area. We propose ways to determine when these theoretical distances are inadequate approximations; and we provide alternatives for these situations.

Date: 1998
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DOI: 10.1080/10835547.1998.12090939

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