[GRASS-dev] Re: [GRASS GIS] #322: Exporting centroids

[GRASS GIS]

#322: Exporting centroids
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  Reporter:  gridcell  |       Owner:  grass-dev at lists.osgeo.org
      Type:  defect    |      Status:  new                      
  Priority:  minor     |   Milestone:  6.4.0                    
 Component:  default   |     Version:  6.3.0                    
Resolution:            |    Keywords:  v.out.ogr export         
  Platform:  Linux     |         Cpu:  x86-32                   
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Comment (by hamish):

 Replying to [ticket:322 gridcell]:
 > Unable to export centroids to PostGIS (or Shapefile) using v.out.ogr...
 >
 > v.out.ogr input=blk at PERMANENT type=point,centroid 'dsn=PG:
 host=localhost user=postgres dbname=test' olayer=blk layer=1
 format=PostgreSQL
 >
 > I get the following in my output...
 {{{
 > 6 Boundary(ies) found, but not requested to be exported. Verify 'type'
 parameter.
 >
 > Exporting 9 points/lines...
 >
 > ERROR 1: INSERT command for new feature failed.
 > ERROR:  geometry requires more points
 >
 > Command: INSERT INTO "blk" (wkb_geometry , "cat", "comments") VALUES
 (GeomFromEWKT('SRID=32768;LINESTRING (1361422.480504325358197
 586604.790284495218657)'::TEXT) , 1, 'Polygon 1')
 > ERROR 1: INSERT command for new feature failed.
 > ERROR:  geometry requires more points
 }}}


 centroids being send at type LINESTRING()? (which then wants at least 2
 points to make a line)

 what if you extract the centoids to their own map first?


 do PostGIS/Shapefile/Simple Features have any concept of centroids?


 Hamish

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Ticket URL: <https://trac.osgeo.org/grass/ticket/322#comment:1>
GRASS GIS <http://grass.osgeo.org>