Category	Variable	Source
Density Factor	Gross Population density	Tiger (United States Census Bureau, 2010) , (ESRI Data & Maps, 2004)
Density Factor	Gross Employment density	LED (Local Employment Dynamics, n.d.)
Mix Use Factor	Job-Population balance	Tiger, LED (Local Employment Dynamics, n.d.) , (ESRI Data & Maps, 2004)
	Degree of Job mixing	LED (Local Employment Dynamics, n.d.)
	Grocery/Amenity reachability index	Tiger (United States Census Bureau, 2010) , Google Earth
Street Factor	Intersection density	Tiger (United States Census Bureau, 2010)
	% 4 or more way intersection	Tiger (United States Census Bureau, 2010)
	Average Block Size	Tiger (United States Census Bureau, 2010) , (ESRI Data & Maps, 2004)
	Percent of Small blocks (<1/100 sq miles)	Tiger (United States Census Bureau, 2010) , (ESRI Data & Maps, 2004)
Centering Factor	Inverse of Distance to Major City Centers	Tiger (United States Census Bureau, 2010)