Food Access in San Bernardino County, California
Debapriya Paul | Douglas Flewelling Ph.D.| Department of GIS| University of Redlands
Who has access to grocery and convenience stores within a 10-minute drive and walk time in San Bernardino County, California?
Objective
The goal was to identify Census Blocks in San Bernardino County that have access to food within a 10minute drive or walk time. The Origin-Destination analysis workflow designed to analyze food access was implemented in the study area with ground-validated data inputs.
https://arcg.is/n0PT10
Open the URL to explore the web map and find out whether we are in a food paradise or a food desert.
https://arcg.is/1KOOeu1
Open the URL to explore the Story Map that walks through the data inputs, the steps, and the results of the analysis.
Acknowledgments
Methodology
Compare data sources by ground validation of samples
Filter dataset based on NAICS codes for Grocery stores or Supermarkets, Convenience stores (i.e., the Destinations)
Generate centroids of Census Blocks to represent an aggregation of where people are traveling from (i.e., the Origins)
Using the Origins and Destinations, execute Origin-Destination network analysis
Generate food access surface to visualize walking and driving food patterns
The map represents Census Blocks that display low access to food stores (drive and walk) in San Bernardino County. A few examples would be areas around Barstow, Twentynine Palms, Yucca Valley, and Joshua Tree. The areas record over 400 people affected by low accessibility by walking or driving.
In San Bernardino County, 64% of the population (1.4 million people) live in areas that do not have access to stores within a 10-minute walk. Only 1.4% of the total population lives outside drivable areas to stores.
I would like to acknowledge and thank Jennifer Bell and Jim Herries for their guidance throughout the research.
