[GRASS-user] v.external ogr error building topology

GRASS GRASS user
, ,
1

I'm trying to use v.external with a Postgis point layer, but I get

"Random read is not supported by OGR for this layer, cannot build support."

I can view the geometries but the topology has not been created (and
no connection to db is present).
I know it's a metioned bug [1], maybe due to the Postgis OGR driver. I
was asking if it's been investigated and/or solved...

I'm using gdal 1.4.2, grass 6.2.3, potgresql 8.2 + postgis 1.2.1.
I'm working on Kubuntu 7.10

Thanks,
Giovanni

[1] http://lists.osgeo.org/pipermail/grass-user/2007-August/040707.html

2

I can see it's something with this lines of code:

/* test layer capabilities */
    if ( !OGR_L_TestCapability ( Map->fInfo.ogr.layer, OLCRandomRead ) ) {
  G_warning ("Random read is not supported by OGR for this layer,
cannot build support." );
  return 0;
    }

inside grass6/lib/Vector/Vlib/build_ogr.c, which seems to be the same
since Wed Jun 14 21:32:05 2006 [1]

Giovanni

[1] http://freegis.org/cgi-bin/viewcvs.cgi/grass6/lib/vector/Vlib/build_ogr.c

2007/12/18, G. Allegri <giohappy@gmail.com>:

I'm trying to use v.external with a Postgis point layer, but I get

"Random read is not supported by OGR for this layer, cannot build support."

I can view the geometries but the topology has not been created (and
no connection to db is present).
I know it's a metioned bug [1], maybe due to the Postgis OGR driver. I
was asking if it's been investigated and/or solved...

I'm using gdal 1.4.2, grass 6.2.3, potgresql 8.2 + postgis 1.2.1.
I'm working on Kubuntu 7.10

Thanks,
Giovanni

[1] http://lists.osgeo.org/pipermail/grass-user/2007-August/040707.html