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

[Sandor Csaba]

Thank you!

That clears this for me.

I can still join the network table back to the resulting node list and
figure out all edges that are concerned.

Csaba

2011/3/23 Daniel Kastl <daniel at georepublic.de>:
> Driving distance only returns valid nodes.
> The edge column is there to make the output look the same as the other
> functions ... we can discuss this is a good idea or not.
> Sorry for the confusion. Maybe this should be written somewhere more
> clearly.
> Daniel
>
> 2011/3/23 Sandor Csaba <sandor.csaba at viamap.hu>
>>
>> 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
>>
>> _______________________________________________
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>> 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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>



-- 
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