[Qgis-user] representation of angles in QGIS - recalculation to arithmetic values

[Andreas Neumann]

Hi Andrea,

Nice shortcut - and use of the modulus operator! Now the calculation is 
really short!

Nevertheless it would be kind of nice to have a QGIS expression function 
to convert azimuth into math angles. I assume that Christine wouldn't be 
the only one looking for this calculation.

Christine - do you want to create a feature request for such an 
expression function at https://github.com/qgis/QGIS/issues ?

Andreas

On 2021-12-07 08:49, Andrea Giudiceandrea wrote:

>> Richard Greenwood [1] Mon, 06 Dec 2021 10:57:06 -0800 [2]
>> 
>> g = (450-m) - int((450-m) / 360) * 360
>> where m = mathematical angle (0 east, anti-clockwise)
>> and g = geographic angle (0 north, clockwise)
> 
> Which is equivalent to:
> 
> g = (450-m) % 360
> 
> Best regards.
> 
> Andrea Giudiceandrea
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[1] 
https://www.mail-archive.com/search?l=qgis-user@lists.osgeo.org&q=from:%22Richard+Greenwood%22
[2] 
https://www.mail-archive.com/search?l=qgis-user@lists.osgeo.org&q=date:20211206
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