I used the 2010 US Census data. The first red circle represents the Census Tract information; the second circle is POP2010. I used the tract information to compute the centroids of the population so that I could measure a Euclidian distance of one mile from the grocery store layer. The last column is the Near_Dist data derived from ArcMap – Like I said, I could not use QGIS to do everything I wanted – This Near column is the result of executing the Near Tool with a one mile search. Any item that returned a -1 is farther than one mile from the grocery store and hence in a Food Desert by my definition.
My Mapbox Link: Mapbox Brevard Food Desert
The data I created is very good and highly useful for the purpose of determining Food Deserts. I believe that my data fairly represents the Food Desert situation in my study area.
Here is my final presentation for GIS 4930:
Link to My Presentation: My Brevard County Food Deserts Presentation