Table 2.

Summary of grocery stores in Michigan Seven-County Area by data source.

	Detroit Food Map	Reference USA	Yelp
Number of grocery stores	426	1631	813
Total number of census tracts with at least one Grocery store	340	847	524
Total number of block groups with at least one Grocery store	370	1121	628
Prevalence of grocery stores in census tracts	24%	60%	37%
Prevalence of grocery stores in block groups	9%	28%	16%

There are a total of 1414 census tracts and 4008 census block groups in the 7-county area