[pgrouting-users] alphashape

Suhr, Ralf Ralf.Suhr at itc-halle.de
Mon Feb 8 04:49:50 EST 2010

Hello Bogumił,

the function you searched for is in routing_dd_wrappers.sql. 
points_as_polygon(QUERY varchar) Your QUERY need to return id, x and y.

SELECT the_geom AS alpha_shape FROM points_as_polygon('SELECT id, ST_X(your_geom) AS x, ST_Y(your_geom) AS y FROM your_table');


-----Ursprüngliche Nachricht-----
Von: pgrouting-users-bounces at lists.postlbs.org [mailto:pgrouting-users-bounces at lists.postlbs.org] Im Auftrag von Bogumil Szady
Gesendet: Samstag, 6. Februar 2010 13:15
An: pgrouting-users at lists.postlbs.org
Betreff: [pgrouting-users] alphashape

Hello Friends,
Is anyone who help me about using function alphashape in postgresql? I 
installed all and I found this function in my database. But I couldn't 
find any information or examples how create polygon (shape) from points 
table that I have in my database.

Thanks for help



dr Bogumił Szady
mail: szady at kul.lublin.pl <mailto:szady at kul.lublin.pl>
www: hgis.kul.lublin.pl <htttp://hgis.kul.lublin.pl>

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