Hi Devs,
I noticed that the expression functions length(), perimeter() and area()
use the QgsGeometry length() and area() functions to calculate the
Cartesian length of lines and perimeter and area of polygons.
The Identify Features map tool uses instead the QgsAbstractGeometry
class length() and perimeter() functions for the Cartesian length of
lines and the perimeter of polygons and the QgsGeometry area() function
for the Cartesian area.
This leads to inconsistent results when the geometries contain
CircularStrings or CurvePolygons.
In this case the QgsAbstractGeometry class functions are more accurate
then the QgsGeometry ones.
Is there any reason or contraindication why not to use the
QgsAbstractGeometry class functions also for the expression functions
length(), perimeter() and area() and for the Identify Features map tool
measurement of polygons area?
Best regards.
Andrea Giudiceandrea
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