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pgRouting

This guide provides step-by-step instructions to produce drive-time isochrones using a single vector shapefile. The method described here involves building a routing network using a single vector shapefile of your roads data within a Virtual Box. Furthermore, the network is built by creating start and end nodes (source and target nodes) on each road segment. We will use Postgresql, with PostGIS and Pgrouting extensions, as our database. Please consider this type of routing to be fair, regarding accuracy, as the routing algorithms are based off the nodes locations and not specific addresses. I am currently working on an improved workflow to have site address points serve as nodes to optimize results. One of the many benefits of this workflow is no financial cost to produce (outside collecting your roads data). I will provide instructions for creating, and using your virtual machine within this guide.

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This is the follow up post to “An osm2po Quickstart” which covers loading the OSM network into PostGIS and using the result with pgRouting. After parsing the OSM file, e.g. C:\Users\Anita\temp\osm2po-4.2.30>java -jar osm2po-core-4.2.30-signed.jar prefix=at “C:\Users\Anita\Geodaten\OpenStreetMap Data\austria.osm.pbf” you should find a folder with the name of the prefix you chose inside the osm2po folder. It contains a …

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PgRouting is great. But (Yes, there is always a “but”.) those queries are not easy to remember. That’s why I started work on a pgRouting GUI today. It’s actually a QGIS plugin which I’ll call “pgRouting Layer” and it is based on Pablo T. Carreira’s “Fast SQL Layer” plugin which can execute arbitrary SQL statements …

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Please read the new instructions for pgRouting 2.0. The aim of this post is to describe the steps necessary to calculate routes with pgRouting. In the end, we’ll visualize the results in QGIS. This guide assumes that you have the following installed and running: Postgres with PostGIS and pgAdmin QGIS with PostGIS Manager and RT …

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