Hi James I guess you get a better performance with PostGIS. If you move your data to PostGIS, you can even use pgRouting: http://www.pgrouting.org/
Cheers Saber > Dear Alex and Alexander, > > Thank you for your assistance regarding my problem. I do still have > access to ArcGIS, so I will dump the entire network to a shapefile. > Given that it is the entire London road network, I am a bit concerned > that it will perhaps be too large (?) but I will try. > > Once I have it as a Shape, could I then use 'Spit' to move it into > PostGIS do you think? I am doing some analysis in PostGIS at the > moment, so if I could do most of my network analysis in PostGIS that > would be great (though would also like to use QGIS for visualisation). > I will also try using the RoadGraph plugin which I looked at earlier > and it looked simple to use. > > Regards > > James > > >> 3. Re: Integrated Transport Network (Alex Mandel) >> >> Message: 3 >> Date: Tue, 21 Jun 2011 01:46:51 -0700 >> From: Alex Mandel <[email protected]> >> Subject: Re: [Qgis-user] Integrated Transport Network >> To: [email protected] >> Message-ID: <[email protected]> >> Content-Type: text/plain; charset=UTF-8 >> >> I agree, dump to shp file as soon as you can, or another more >> interchangeable format. If you still have access to Arc that will make >> life easier, the OGR driver can't do everything (well not 100% sure). >> >> Once in QGIS you have the plugin already mentioned, the v.net tools in >> GRASS, pgrouting in Postgis and routing in Spatialite as potential ways >> of doing similar analysis. >> >> Enjoy, >> Alex >> >> On 06/20/2011 10:52 PM, Alexander Bruy wrote: >>> Hi, >>> >>> you can use RoadGraph plugin (Plugins-Manage plugins) to find >>> shortest paths between two points. I don't know how Integrated >>> Transport Network stored in Personal GeoDatabase, but you can >>> try to access your data with GDAL (there is a driver for this) or >>> export them to shapefile. >>> >>> Hope this helps >>> >>> 2011/6/20 James David Smith <[email protected]>: >>>> Dear all, >>>> >>>> I have used ArcGIS over the last 6 months and would class myself as a >>>> beginner/intermediate, but would now like to try using QGIS instead. I >>>> have been getting on ok with it over the last few weeks, but have come >>>> to a point where I would like to load a transport network, in the way >>>> that I would have done in ArcGIS. I have the Integrated Transport >>>> Network as a Microsoft Access Database / Personal Database at the >>>> moment. Is there some way that I can load this into QGIS? And then >>>> start to do some basic network analysis such as time and distance from >>>> point 1 to point 2? >>>> >>>> Thanks for your help, >>>> >>>> James >>> > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user > _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
