[Qgis-user] azimuth offset 0.32 added to all drawn segments in Azimuth and Distance plugin

[Andrea Giudiceandrea]

> Jeremy Jackson jerj at coplanar.net
> Mon Sep 25 06:28:31 PDT 2023

> When working with git master branch, or 3.32.2, QGIS Azimuth and Distance plugin seems to add a constant offset to the azimuths entered.

> If i use the measure bearing tool, i get around 0.32 degrees, and it seems to vary slightly each time i draw from a different starting point, but if I delete the drawn, point and snap to the same starting point, i get the same offset.

Hi Jeremy,
it looks like the issue is due to the fact that, while the "Azimuth and 
Distance" plugin always uses the planimetric azimuth/bearing and the 
planimetric distance (i.e. calculated on the Cartesian plane of the 
Project CRS), the Measure Bearing tool returns the bearing angle 
measured on the ellipsoid set for the current Project (in 
Project->Properties...->Measurements->Ellipsoid), instead.

If you set the Project ellipsoid to "None / Planimetric", than the 
Measure Bearing tool will return the planimetric bearing angle (i.e. 
measured on the Cartesian plane of the Project CRS).

You can also use the "Azimuth Measurement Map Tool" plugin which allow 
to switch between Cartesian and ellipsoidal measurement directly in the 
tool window.

Best regards.

Andrea