Don't use geos to calculate QgsGeometry::length

Instead use the QgsAbstractGeometry method, so that consistent results are obtained across the API and an exact length is used for curved geometries (instead of the length of the segmentized curves) Refsi https://lists.osgeo.org/pipermail/qgis-developer/2021-October/064159.html.
qgis · Nov 2, 2021 · e10a48b · e10a48b
1 parent 9f19d4f
commit e10a48b
Showing 1 changed file with 1 addition and 9 deletions.
diff --git a/src/core/geometry/qgsgeometry.cpp b/src/core/geometry/qgsgeometry.cpp
@@ -1913,15 +1913,7 @@ double QgsGeometry::length() const
     return -1.0;
   }
 
-  // avoid calling geos for trivial geometry calculations
-  if ( QgsWkbTypes::geometryType( d->geometry->wkbType() ) == QgsWkbTypes::PointGeometry || QgsWkbTypes::geometryType( d->geometry->wkbType() ) == QgsWkbTypes::LineGeometry )
-  {
-    return d->geometry->length();
-  }
-
-  QgsGeos g( d->geometry.get() );
-  mLastError.clear();
-  return g.length( &mLastError );
+  return d->geometry->length();
 }
 
 double QgsGeometry::distance( const QgsGeometry &geom ) const