[analysis] fix derivative filter z factor handling (#5073)

qgis · Aug 25, 2017 · 74306c7d50b1ac032b7c4f2fcbbdfe7d4c310b38 · 74306c7
1 parent 3ef008c
commit 74306c7d50b1ac032b7c4f2fcbbdfe7d4c310b38
Unified Split

Showing with 2 additions and 2 deletions.

+2 −2 src/analysis/raster/qgsderivativefilter.cpp
diff --git a/src/analysis/raster/qgsderivativefilter.cpp b/src/analysis/raster/qgsderivativefilter.cpp
@@ -92,7 +92,7 @@ float QgsDerivativeFilter::calcFirstDerX( float* x11, float* x21, float* x31, fl
     return mOutputNodataValue;
   }
 
-  return sum / ( weight * mCellSizeX * mZFactor );
+  return sum / ( weight * mCellSizeX ) * mZFactor;
 }
 
 float QgsDerivativeFilter::calcFirstDerY( float* x11, float* x21, float* x31, float* x12, float* x22, float* x32, float* x13, float* x23, float* x33 )
@@ -159,7 +159,7 @@ float QgsDerivativeFilter::calcFirstDerY( float* x11, float* x21, float* x31, fl
     return mOutputNodataValue;
   }
 
-  return sum / ( weight * mCellSizeY * mZFactor );
+  return sum / ( weight * mCellSizeY ) * mZFactor;
 }