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
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