Contour lines are most often used to represent topography on two-dimensional maps and figures. However, they can represent spatially changing values for any variable. Creating,…

Allentown doesn’t have a redlining map, or at least not one that has survived to be examined today. Yet, even without an official red line on a map, investors seem to have drawn that line of their own when it comes to home sales in the city.

food desert, supermarket redlining

food deserts, supermarket redlining

Food Deserts, supermarket redlining

Public Participation GIS, participatory GIS

Purple Air API and developer account site

I did a web search to see what was returned when looking for the September 2020 San Franciso ‘orange sky’ event and purple air and the below link was one of the first returned
The Bay Area Just Turned Orange. All Eyes A…