Figure 4
From: Modeling the probability distribution of positional errors incurred by residential address geocoding
Scatterplot of the positional errors (in meters) for the E911 geocodes. The upper left panel displays the complete data; The upper right panel displays errors for addresses on streets aligned E-W; The lower left panel displays errors for addresses on streets aligned N-S; and the lower right panel is a superposition of the upper right panel and a 90-degree counterclockwise rotation of the lower left panel.