[postgis-users] Calculating driving distance/times

[Anthony DeBarros]

Hi, everyone. Longtime lurker, first-time poster here ...

Let's say I have a collection of several thousand U.S. locations in the U.S. geocoded by lat/long.

I'd like to perform an analysis that lets me visualize places in the U.S. that have none of these locations within a certain driving distance. For example, if I had a collection of locations of fast-food restaurants, I would like to show all the places in the U.S. that have no fast-food within 100 miles.

Are there tools PostGIS, QGIS, others or methodologies you'd recommend?

Thanks,

Anthony

[James Keener]

I actually just finished talking about this within the context of a
transit stop's walkshed.

http://jimkeener.com/posts/calculating-service-area-part-2-defining-the-walkshed

I used PostgreSQL + postGIS + pg-routing to do analysis and QGIS to do
the visualization.

Hop that helps some!

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[Anthony DeBarros]

Looks very interesting -- thank you!