[GRASS-user] Attribute table from v.net.allpairs; v.out.ogr - dsn option in GUI

Markus Metz markus.metz.giswork at gmail.com
Wed Apr 24 10:30:47 PDT 2013

On Wed, Apr 24, 2013 at 3:01 PM, Johannes Radinger
<johannesradinger at gmail.com> wrote:
> Hi,
> There are two little issues that recently popped up in GRASS 7
> 1) I performed a pairwise network analysis with v.net.allpairs.
> The attribute table to the output map "map" that is produced is called
> "map_1" (note: _1 !!).

This is because if a table with node attributes exists in the input
vector, this table is also copied to the output vector and should have
the name map_2.

Thus when I then try to export the attribute table to
> a csv using v.out.ogr I get following warning (which is of course net a
> problem):
> db.out.ogr input=map_1 dsn=path/to/csv/file.csv format=CSV
> WARNING: Vector map <map_1> not found -->right, because there is no map_1,
> the map is called "map"
> Is that an intended behaviour that the corresponding attribute table for
> v.net.allpairs gets a ending of "_1"?
> 2) It seems that the option for the output in db.out.ogr is maybe set wrong
> (http://svn.osgeo.org/grass/grass/trunk/scripts/db.out.ogr/). Is it really
> necessary that the outputfile already exists because the GUI asks to select
> a file rather than allow specifying the path to the file? I want to create a
> new csv with that module, so maybe the following needs to be changed from
> "old" to "new":
> #%option G_OPT_F_INPUT
> #% key: dsn
> #% gisprompt: old,bin,file
> #% description: Table file to be exported or DB connection string
> #% required : yes
> #%end

or simpler

#%option G_OPT_F_OUTPUT
#% key: dsn
#% description: Table file to be exported or DB connection string

Fixed in r55983.

Markus M

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