[pgrouting-users] pgrouting installation

[Daniel Kastl]

A-Star and Dijkstra start from a source or target point of an edge, Shooting
Star starts from an edge.
If you want to make the route start in the middle of an edge you need to
split this edge. PostGIS has a substring function for that, which may be
useful.

Daniel



On Sun, Sep 18, 2011 at 1:49 AM, Ali Taha <ali.taha at ritaj.ps> wrote:

> Dear All,****
>
> ** **
>
> I used grass GIS to fix the data, the routing engine worked, in the
> attached a screenshot of the result, it started from the next point near the
> start point until the first point next to the stop point. Is this the way
> pgrouting works or I have something wrong?****
>
> ** **
>
> Thanks****
>
> ** **
>
> ** **
>
> *From:* pgrouting-users-bounces at lists.osgeo.org [mailto:
> pgrouting-users-bounces at lists.osgeo.org] *On Behalf Of *Daniel Kastl
> *Sent:* Wednesday, September 14, 2011 4:29 PM
>
> *To:* pgRouting users mailing list
> *Subject:* Re: [pgrouting-users] pgrouting installation****
>
> ** **
>
> ** **
>
> On Tue, Sep 13, 2011 at 8:41 AM, Ali Taha <ali.taha at ritaj.ps> wrote:****
>
> Hi Carles ****
>
>  ****
>
> Well I guess I am in trouble now J, It seems the data is not ready for
> routing. ****
>
> The paths are not continues because the lines are not breaked at each
> intersection.****
>
> ** **
>
> ** **
>
> Hi Ali,****
>
> ** **
>
> Look at this question GIS Stackexchange. Maybe it helps you to solve your
> problem:****
>
>
> http://gis.stackexchange.com/questions/13544/split-edges-at-intersections-in-postgis
> ****
>
> ** **
>
> Daniel****
>
> ** **
>
> ** **
>
> ** **
>
>  ****
>
>  ****
>
> Is there a tool (or plugin for QGIS) to clean the data by splitting lines
> at each intersection?****
>
>  ****
>
>  ****
>
> Thanks****
>
>  ****
>
>  ****
>
>  ****
>
>  ****
>
> *From:* pgrouting-users-bounces at lists.osgeo.org [mailto:
> pgrouting-users-bounces at lists.osgeo.org] *On Behalf Of *Charles Galpin
> *Sent:* Tuesday, September 13, 2011 5:15 PM****
>
>
> *To:* pgRouting users mailing list
> *Subject:* Re: [pgrouting-users] pgrouting installation****
>
>  ****
>
> Without seeing the headers it's hard to tell is this is ok. I guess it
> confirms the start/end points are there anyway.****
>
>  ****
>
> I can only suggest you manually find a few links that you know are
> connected and try route that and see what happens. So start with your link
> with source 24154 and get the next link with a source that matches the first
> link target and so on for a few links and then choose the last target as the
> end point. Does that work?****
>
>  ****
>
> charles****
>
>  ****
>
> On Sep 13, 2011, at 9:10 AM, Ali Taha wrote:****
>
> ** **
>
> Hi Charles,****
>
> I got the following result (note that I am using my own ways data):****
>
>  ****
>
>
> _______________________________________________
> Pgrouting-users mailing list
> Pgrouting-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/pgrouting-users****
>
>
>
> ****
>
> ** **
>
> --
> Georepublic UG & Georepublic Japan
> eMail: daniel.kastl at georepublic.de
> Web: http://georepublic.de****
>
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>


-- 
Georepublic UG & Georepublic Japan
eMail: daniel.kastl at georepublic.de
Web: http://georepublic.de
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