Hi, Sounds doable but a bit complicated. It woud be easier for me to use PostGIS and pgrouting, but I updated my database and there in not yet Windows extension for PostgreSQL 9.2 and PostGIS 2.1. It seems to be coming, though http://www.pledgebank.com/pgRoutingWindows
Routing with Spatialite is very fast and I have been able to visualize the route with OpenJUMP by copy-pasting the route from Spatialite-gui as WKT. Integration would be rather good if the OpenJUMP Spatialite Reader plugin would work. Unfortunately there is something broken nowadays. http://sourceforge.net/apps/mediawiki/jump-pilot/index.php?title=OpenJUMP_with_SpatialLite#Using_SpatiaLite_with_Spatialite_Reader_Plugin If the plugin worked we could send route requests directly with SQL SELECT * from way_net where FromNode=x and ToNode=y and see the result in OpenJUMP as a new layer. -Jukka- ________________________________________ Michaël Michaud wrote: > Interesting, > Now I see the point : > Planar graph and Noder are both missing something > It would not be too hard to compute links between roads > and the graph nodes by program but it is not so easy > with OJ tools only. > I think it is possible though : > - Create road network with unique ids > - Create unique nodes with planar graph > - Create initial nodes with extract point and select sequence-id=0 > - Create final nodes the way but after a reverse lines operation > - Do the joins between nodes and initial/final nodes to transfer node ids > - Do the joins between initial/final nodes and roads to transfer node ids > For each step, I think there are several ways to go except the last > one where you may have to use matching plugin which can match > features using only an attribute (road id, which must be a string > to be a valid candidate for the matching tool) > There maybe some pitfalls I did not see though, > Michaël >> Hi, >> >> I want todo this with OpenJUMP and Spatialite >> http://www.gaia-gis.it/spatialite-2.4.0/Using-Routing.pdf >> http://www.gaia-gis.it/spatialite-2.4.0-4/spatialite-cookbook/html/dijkstra.html >> >> Spatialite has a tool called spatialite_osm_net which makes a graph from >> OpenStreetMap data but I want to use a road data as input. Therefore I am >> creating edges with OpenJUMP. However, for routing it would be nice to >> transfer road names from the shapefile roads to graph edges like >> spatialite_osm_net does. >> >> -Jukka- > >> Michaël Michaud wrote: >> >>> Hi >>> Let me know what is the use case. >>> Currently, attribute transfert to faces is a costly post-process >>> (included in PlanarGraph plugin but not in Planar Graph calculation) and >>> it works only if there is a 1 to 1 relation between polygons and faces. >>> Is your use-case a network ? A map with surfaces + linestrings ? >>> Other way to get a clean graph with attributes maybe >>> - to use noder >>> - to post-process planargraph result with matching extension (just >>> uploaded the last version) >>> Michaël >>> Hi, >> >>>> The planar graph does not create new layer for transferred attributes if >>>> the Create faces option is not set. >>>> It might also be better to add the attributes into the Egde layer instead >>>> of creating a separate Transfer layer. >> >>>> -Jukka Rahkonen- ------------------------------------------------------------------------------ Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
