Comments on: Where to find a road network for San Francisco?

Question: Where to find a road network for San Francisco?

christy — Mon, 22 Jun 2009 20:27:11 -0800

Looking for a publicly available graph (vertices and edges) representation of San Francisco's streets. Also called a road network I believe.

I'm imagining each vertex is an intersection with edges to intersections that are one block away. Not too concerned with format as long as it's parsable.

Other cities are interesting as well, but I really want SF. Thanks in advance!

By: jedicus

jedicus — Mon, 22 Jun 2009 20:41:27 -0800

The datasets for the 9th DIMACS challenge include distance and travel time graphs for various parts of the US including the SF Bay area.

By: christy

christy — Mon, 22 Jun 2009 20:53:58 -0800

that's a great start, thanks! would be nice if it had any street name information though :)

By: christy

christy — Mon, 22 Jun 2009 21:16:52 -0800

ahh, but your link has lead me to the Tiger Line Files which seem to have exactly what I'm looking for.

Thanks much!

By: a womble is an active kind of sloth

a womble is an active kind of sloth — Mon, 22 Jun 2009 23:26:50 -0800

If you want to convert the shape file/tiger file into a node/link network you can use some of the scripts listed here in ArcGIS.

I was doing this for road networks at a national scale - you are welcome to contact me if you have specific questions.

By: Harald74

Harald74 — Tue, 23 Jun 2009 00:40:14 -0800

Could data from the OpenStreetMap project be modified to suit your needs? Bonus: It's Creative Commons-licenced.

By: pwnguin

pwnguin — Tue, 23 Jun 2009 05:04:55 -0800

Most of openstreetmap in the US comes from Tiger anyways. Tiger is the dataset the US Census publishes, built from Census workers (now with hand held tools to mark updates) who are already canvassing the US.