Check if a point is 3D before returning its z value. Fixes #37772

qgis · Sep 28, 2020 · d1d1569 · d1d1569
1 parent 8d2a0d1
commit d1d1569
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/core/expression/qgsexpressionfunction.cpp b/src/core/expression/qgsexpressionfunction.cpp
@@ -2349,6 +2349,9 @@ static QVariant fcnGeomZ( const QVariantList &values, const QgsExpressionContext
   if ( geom.isNull() )
     return QVariant(); //or 0?
 
+  if ( !geom.constGet()->is3D() )
+    return QVariant();
+
   //if single point, return the point's z coordinate
   if ( geom.type() == QgsWkbTypes::PointGeometry && !geom.isMultipart() )
   {