There's an example of navigating it with recursive CTE in the implementation of GetRingEdges:
https://github.com/postgis/postgis/blob/2.1.0/topology/sql/query/GetRingEdges.sql.in#L50 Have fun! --strk; On Mon, Oct 21, 2013 at 11:19:05AM -0200, George Silva wrote: > I kinda need something similar. My objective was to calculate strahler > stream order and horton's stream order. > > I was feeling that the topology graph next_edge could give me the data that > I need, but I haven't really tried. I also would like to hear if someone > else has the same or something that could be done. > > Any thoughts? > > > On Mon, Oct 21, 2013 at 11:10 AM, Rémi Cura <[email protected]> wrote: > > > Hey dear list, > > > > Anybody has some advices about navigating trough topology graph (ie given > > a node, find list of next, etc). > > > > I was thinking of using directly the table "edge_data", but it feels like > > a lots of self join. > > > > > > Cheers, > > Rémi-C _______________________________________________ postgis-users mailing list [email protected] http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users
