Bug report #6437
dissolve converting 2d -> 3d
|Affected QGIS version:||1.8.0||Regression?:|
|Operating System:||OSX, Linux||Easy fix?:|
|Pull Request or Patch supplied:||No||Resolution:||worksforme|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||15678|
It seems that when I dissolve a shapefile with 2d polygons, the output is a 3d PolygonZ shapefile (with Z=0 for all vertices).
A work around is to convert it back into 2d with ogr2ogr, but it took me a while to figure out what was going on.