Spatial Geometry

The geographic database used in this publication came from the Environmental Systems Research Institute's (ESRI's) ArcUSA database, which includes spatial geometry and characteristics of all U.S. counties. ESRI modified the 1973 Digital Line Graph source data produced by the U.S. Geological Survey to update county boundaries through 1988. The geographic scale of the spatial geometry (i.e., linework) used is 1:2 million, which is sufficient to identify major county features. Mortality and population data were linked to county geography using FIPS codes.

Date last reviewed: 09/13/2006
Content source: Division for Heart Disease and Stroke Prevention, National Center for Chronic Disease Prevention and Health Promotion