id summary reporter owner description type status priority milestone component version severity resolution keywords cc 6331 Updating an XYM shapefile looses the measure strk warmerdam I hadn't tried a direct ogr2ogr call but from a QGIS ticket, and discussion with Even, I understood the XYM input is currently mapped to an XYZ and the Z is lost on update (as Z is not a known component of the output). defect closed normal 2.1.0 default unspecified normal fixed