Hi Ruth,
I've imported your data from shp to postgis, with ogr2ogr, like this:
ogr2ogr -overwrite -f "PostgreSQL" PG:"host=localhost user=geobox
dbname=geotuga password=geobox" -a_srs EPSG:4326 -nlt MULTIPOLYGON -nln
usa as_clean_test_ogr_export_utf8.shp
Then, I run the following query:
select count(*), st_isvalid(wkb_geometry) from usa
group by st_isvalid(wkb_geometry);
The results is:
count | st_isvalid
-------+------------
13 |
3218 | t
3 | f
So, I would say that you have invalid geometries that are causing this
problem.
I hope it helps.
Regards,
Jorge
Às 18:44 de 03-12-2016, Ruth Simm escreveu:
Hi,
I'm having a serious data export problem with the PGAdmin widget and
pgsql2shp (QGIS too). The problem lies within converting a PostGIS table
to shapefile. *I put in 3234 feature counts...and I get back 3221.*
I get limited information from the error reports (see below...QGIS gives
me the most information...but it is minimal). The errors (when
available) reference ogr....but not much else. Ironically, the only way
I've found to actually export the *full* record set is by using ogr2ogr.
I'm not sure why round-tripping with the PGAdmin tool is failing so bad.
It seems to be able to import the initial 3234 - but cannot export the
full set.
I do notice the Polygon/Multipolygon converting happening...but seeing
that many of the tables "Multipolygons" are just single Polygons added
into the Multipolygon bucket...I'm not sure if that has anything to do
with it.
Very perplexed. If anybody can pull my dataset and repo this (or tell me
how they got around it - using anything BUT ogr2ogr) I'd appreciate it!!!!
Here are my specs:
PostgreSQL 9.2.4 (on a Linux server)
pgsql2shp 2.1.1
PostGIS 2.0 Shapefile and DBF Loader Exporter (PGAdmin tool)
QGIS 2.6.0 - Brighton (on windows...we've tested using more up-to-date
versions too)
Here is the data <https://spaces.hightail.com/space/ihoE7> (2 MB
unzipped on a cloud drive).
Here is what I do...
1) Load the shapefile into Postgres using the PGAdmin tool (works
fine...notably it is loaded as a MULTIPOLYGON[2] EVEN THOUGH the
Shapefile type is Polygon)
*3234 record counts*
Importing with configuration: as_clean_test_ogr_export_utf8, public,
geom, H:\as_clean_test_ogr_export_utf8.shp, mode=c, dump=1, simple=0,
geography=0, index=1, shape=1, srid=4326
Shapefile type: Polygon
PostGIS type: MULTIPOLYGON[2]
Shapefile import completed.
Connecting: host=pgsqlgis-repos port=5432 user=local-dev
password='*********'
2) Try to export the table tp shapefile... (this doesn't work for the
following..and notably they are all trying to export it as a Polygon)
UPON Export (using >pgsql2shp)
H:\>pgsql2shp -f E:/as_clean_test_ogr_export_utf8.shp -h <hostname> -u
<username> -p <port> -P <password> <postgrestable>
"as_clean_test_ogr_export_utf8"
Initializing...
Done (postgis major version: 2).
Output shape: Polygon
Dumping: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX*[3221 rows]*.
QGIS (Save As in QGIS 2.6.0)
Export to vector file failed.
Error: Feature write errors:
Feature geometry not imported (OGR error: )
Feature geometry not imported (OGR error: )
Feature geometry not imported (OGR error: )
Feature geometry not imported (OGR error: )
Feature geometry not imported (OGR error: )
Feature geometry not imported (OGR error: )
Feature geometry not imported (OGR error: )
Feature geometry not imported (OGR error: )
Feature geometry not imported (OGR error: )
Feature geometry not imported (OGR error: )
Feature geometry not imported (OGR error: )
Feature geometry not imported (OGR error: )
Feature geometry not imported (OGR error: )
*Only 3221 of 3234 features written.*
Export Using PostGIS 2.0 Shapefile and DBF Loader Exporter
*3221 record counts*
Exporting with configuration: as_clean_test_ogr_export_utf8, public,
as_clean_test_ogr_export_utf8
Done (postgis major version: 2)
Output shape: Polygon
Table export completed.
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J. Gustavo
--
Jorge Gustavo Rocha
Departamento de Informática
Universidade do Minho
4710-057 Braga
Tel: +351 253604480
Fax: +351 253604471
Móvel: +351 910333888
skype: nabocudnosor
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