[gdal-dev] reading postgis xyzm with ogr2ogr

[Paul Ramsey]

You could use the OGR sql query option to wrap your geometry call in a force2d or force3d function call in PostGIS?

-- 
Paul Ramsey
http://cleverelephant.ca
http://postgis.net

On February 11, 2015 at 9:54:07 AM, Duarte Carreira (dncarreira at gmail.com) wrote:

Hi there.

 

I’m trying to figure out how to read xyzm geometries from postgis with ogr2ogr, if at all possible.

 

I get the usual "is not supported" error:

ERROR 1: Reading EWKB with 4-dimensional coordinates (XYZM) is not supported

 

But reading old tickets I get the idea there is a way to read and just ignore the 4th dimension, instead of getting null geometries.

 

For instance:

http://trac.osgeo.org/gdal/ticket/1323

 

From 8 years ago(!), says:

The problem does not occur if a layer is accessed using
OGRPGDataSource::GetLayerByname()
Then, geometry is read in EWKT form and parsed correctly without any errors but M coordinate is omitted.

Can this be done using og2ogr?

 

Thanks,

Duarte
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