[pgrouting-users] driving_distance function nodes returned ok edges incomplete

[Sandor Csaba]

Hi List,

I'm trying to figure out how the driving_distance function works.

Here's my sql:

SELECT * FROM driving_distance('SELECT id::int4,f_junc::int4 AS
source,t_junc::int4 AS
target,ST_Length(ST_Transform(the_geom,23700))::float8 AS cost FROM
omsz_network',3094421,22500,false,false);

The nodes in the given distance are returned correctly, but in case of
edges some of them are returned, some other not.

See attached image:
Red dot is the starting point,
black dots are nodes returned by the function.
Red lines are the edges returned.
Blue lines are all the street network.

What am I doing wrong that not all the edges are returned in the
driving distance?

Thank you,
Csaba

-- 
Sándor Csaba
szolgáltatási vezető
ViaMap Kft.
Székhely/postacím: 1132 Budapest, Váci út 60-62.

Iroda:
1076 Budapest, Garay u. 29-31. I. 1.
(EMLA Környezeti Management és Jog Egyesület)


Tel: +3630/9605853
Fax: +3617002542
-------------- next part --------------
A non-text attachment was scrubbed...
Name: pgrouting_dd_calc.jpg
Type: image/jpeg
Size: 93154 bytes
Desc: not available
Url : http://lists.osgeo.org/pipermail/pgrouting-users/attachments/20110323/1012cd2a/pgrouting_dd_calc-0001.jpg