Figure 5

Scatter diagram of positional error by geocoding method and population density. Each point represents one residential address and there are 1000 addresses for each plot. The true location of each house is set to the center of the circles. The positional errors by density class of TIGER based geocoded addresses as measured from true location are shown in a,b,c; The positional error by density class of parcel-based points as measured from true location are shown in d,e,f.