[pgrouting-users] Isochronous

[Stephen Woodbridge]

Hi Ian,

Can you add a reference to your project here:

    https://github.com/pgRouting/pgrouting/wiki/Writing-functions

under the Friends of pgRouting section.

Thanks,
   -Steve

On 3/18/2014 9:05 PM, Ian Tangert wrote:
> Also there is a query at https://github.com/GregersP/networkReach that
> will do that (return edges based on nodes reached) and cover parts of
> segments when the cost distance goes beyond a node without reaching
> another node.  It's based on pgr_drivingDistance() as mentioned.  You
> might not need such a level of detail but it's worth a look and I'm
> always looking for ways to improve on it if you have any suggestions.
>
> -ian
>
>
> On Tue, Mar 18, 2014 at 1:45 PM, Daniel Kastl <daniel at georepublic.de
> <mailto:daniel at georepublic.de>> wrote:
>
>
>
>
>     On Wed, Mar 19, 2014 at 2:32 AM, Valeria Muñoz <valemunoz at gmail.com
>     <mailto:valemunoz at gmail.com>> wrote:
>
>         HI
>
>         I need to develop a system to generate isochrones according to
>         minutes, you can make this with postgis and how?
>
>         Valeria
>
>
>
>     Hi Valeria,
>
>     The function "pgr_drivingDistance" returns all nodes that can be
>     reached from a start point within a certain "cost" (ie. time) and it
>     also returns the time need to get to each of these nodes:
>     http://docs.pgrouting.org/2.0/en/src/driving_distance/doc/dd_driving_distance.html#pgr-driving-distance
>
>     The function "pgr_pointsAsPolygon" then returns a polygon that
>     includes a set of points:
>     http://docs.pgrouting.org/2.0/en/src/driving_distance/doc/dd_points_as_polygon.html#pgr-points-as-polygon
>
>     The argument is a SQL statement, so if you need isochrones you could
>     run it for each isoline.
>
>     Daniel
>
>
>
>
>
>     --
>     Georepublic UG & Georepublic Japan
>     eMail: daniel.kastl at georepublic.de <mailto:daniel.kastl at georepublic.de>
>     Web: http://georepublic.info
>
>     _______________________________________________
>     Pgrouting-users mailing list
>     Pgrouting-users at lists.osgeo.org <mailto:Pgrouting-users at lists.osgeo.org>
>     http://lists.osgeo.org/mailman/listinfo/pgrouting-users
>
>
>
>
> _______________________________________________
> Pgrouting-users mailing list
> Pgrouting-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/pgrouting-users
>