Table 1.

Empirical geocoding positional error distributions

	Bonner et al. (2003)	Cayo & Talbot (2003)	Ward et al. (2005)
Urban/Town
Median	32	38	56
75th percentile	-	-	92
90th percentile	37	96	-
Mean	96	58	77
Max	1,551	1,088	687
Rural/Nonurban
Median	52	201	88
75th percentile	-	-	254
90th percentile	61	1,544	-
Mean	129	614	210
Max	2,552	18,742	1,731

Summary of geocoding positional error (meters) from 3 studies. Source: Abe and Stinchcomb (2008).