[GRASS-dev] [GRASS GIS] #3248: v.external: mixed up IDs from PostGIS tables

[GRASS GIS]

#3248: v.external: mixed up IDs from PostGIS tables
-------------------------+-------------------------
 Reporter:  sbl          |      Owner:  grass-dev@…
     Type:  defect       |     Status:  new
 Priority:  normal       |  Milestone:  7.2.1
Component:  Vector       |    Version:  7.0.5
 Keywords:  v.external   |        CPU:  Unspecified
 Platform:  Unspecified  |
-------------------------+-------------------------
 I tried to link a PostGIS table to GRASS GIS 7 for point sampling using
 v.external (in GRASS 7.0.6 and GRASS 7.2.1svn).

 With that linked layer (which is not in public schema and has column
 "point_id" as primary key) I get a lot of:


 {{{
 WARNING: No record for category XXXX in table
          <myschema.points>

 }}}

 when I use v.what.rast on that layer.

 The results suggest that not the proper IDs were used when values were
 loaded to attribute table. Because values in the attribute table of the
 points do not match with values in the raster at point locations.
 Furthermore, some points, which are supposed to have values in the
 attribute table, have none...

 With the attaced data, the issue can be reproduced like this:
 {{{
 ogr2ogr -f PostgreSQL "PG:dbname=gisdata schemas=myschema" points.sqlite
 points
 v.external --overwrite input=PG:dbname=gisdata layer=myschema.points
 output=points_pg -o
 g.region -p -a vector=points res=250
 r.random.surface --overwrite --verbose output=rand
 v.what.rast map=points_pg raster=rand column=morphology
 }}}

 Linking the SQLite data source however seems to work fine. No errors for:
 {{{
 v.external --overwrite input=points.sqlite layer=myschema.points
 output=points_sqlite -o
 v.what.rast map=points_sqlite raster=rand column=morphology
 }}}



 This is my PostGIS / GRASS environment:

 {{{
 PostgreSQL 9.5.2 on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu
 4.8.2-19ubuntu1) 4.8.2, 64-bit
 POSTGIS="2.2.2 r14797"
 GEOS="3.5.1-CAPI-1.9.1 r4171"
 SFCGAL="1.3.0"
 PROJ="Rel. 4.9.2, 08 September 2015"
 GDAL="GDAL 2.0.3, released 2016/07/01"
 }}}

 For discussion see: https://lists.osgeo.org/pipermail/grass-
 dev/2017-January/083807.html

--
Ticket URL: <https://trac.osgeo.org/grass/ticket/3248>
GRASS GIS <https://grass.osgeo.org>