This workshop makes use of several FOSS4G tools, a lot more than the workshop title mentions. Also a lot of FOSS4G software is related to other open source projects and it would go too far to list them all. These are the four FOSS4G projects this workshop will focus on:
pgRouting is an extension of PostGIS and adds routing functionality to PostGIS/PostgreSQL. pgRouting is a further development of pgDijkstra (by Camptocamp SA). It was extended by Orkney Inc., and is currently developed and maintained by Georepublic.
pgRouting provides functions for:
Several new algorithms will be added in the near future:
Advantages of the database routing approach are:
pgRouting is available under the GPLv2 license.
pgRouting website: http://www.pgrouting.org
“OpenStreetMap is a project aimed squarely at creating and providing free geographic data such as street maps to anyone who wants them. The project was started because most maps you think of as free actually have legal or technical restrictions on their use, holding back people from using them in creative, productive or unexpected ways.” (Source: http://wiki.openstreetmap.org/index.php/Press)
OpenStreetMap is a perfect data source to use for pgRouting, because it’s freely available and has no technical restrictions in terms of processing the data. Data availability still varies from country to country, but the worldwide coverage is improving day by day.
OpenStreetMap uses a topological data structure:
OpenStreetMap website: http://www.openstreetmap.org
osm2pgrouting is a command line tool that makes it easy to import OpenStreetMap data into a pgRouting database. It builds the routing network topology automatically and creates tables for feature types and road classes. osm2pgrouting was primarily written by Daniel Wendt and is now hosted on the pgRouting project site.
osm2pgrouting is available under the GPLv2 license.
Project website: http://www.pgrouting.org/docs/tools/osm2pgrouting.html
GeoExt is available under the BSD license and is supported by a growing community of individuals, businesses and organizations.
GeoExt website: http://www.geoext.org