I need a little help/ ideas on how to convert tab files.

The problem: I have many TAB files produced daily by 3 party app, I need to batch import the files into postgres.

Most files import fine, however some files has mixed content like linestrings and multilinestrings in one file.

I can't import that type of files.

I can open the files in qQGIS, and save as a shapefile and then import to the database, but it needs to be done in a batch job.

This is what I'm using and what is working for files that only has linestrings.

C:\Program Files (x86)\FWTools2.4.7\bin>ogr2ogr -skipfailures -overwrite -t_srs "EPSG:4326" -s_srs "EPSG:4326" -a_srs "EPSG:4326" -f "PostgreSQL" PG:"host=localhost user=zzz dbname=geo password=zzz" C:\gisdata\Cables_1.tab -nln tmpimport.Cables_1
This is the error I get when importing a mixed content file
Warning 1: Geometry to be inserted is of type Multi Line String, whereas the layer geometry type is Line String.
Insertion is likely to fail
ERROR 1: INSERT command for new feature failed.
ERROR: Geometry type (MultiLineString) does not match column type (LineString)

Anyone has any advice?

1 Answer 1


So what do you do with the Multi Line Strings that aren't imported? Are you just ignoring these?

You could change the Geometry type of your column to also allow MultiLineString


  • 2
    Hi Peter, setting -nlt GEOMETRY fixed the problem. Thanks. ogr2ogr -skipfailures -overwrite -t_srs "EPSG:4326" -s_srs "EPSG:4326" -a_srs "EPSG:4326" -nlt GEOMETRY -f "PostgreSQL" PG:"host=localhost user=zzz dbname=geo password=zzz" C:\gisdata\Cables_1.tab -nln tmpimport.Cables_1
    – dk_nls
    Commented May 3, 2013 at 11:24

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