Hi Carlos;
It seems you have the calculation of azimuth figured out. I would
generate a new filed in the attribute table and use the field calculator
to calculate your bearings. If you are comfortable with python, you can
create a script as well.
If you are using a projected coordinate system, take note that North
would be actually be grid north and your calculate azimuth would be in
relation to it. If you want to reference actual true north, you would
have to calculate the convergence between true and grid north for your
project area. If you want the coordinates referencing magnetic north
(perhaps for field work), then you would also have to calculate the
magnetic declination for your project.
Kirk Schmidt
On 4/8/2021 6:30 PM, Sebastian Gutwein wrote:
Carlos-
Interesting problem-
You might get better responses on stack exchange.
I have the same confusion as Ujaval. Each side of your polygon will
have a different bearing.
If all you care about is the average angle then you can use this
expression main_angle( $geometry)
This will return azimuth of the polygon in degrees from north.
I don't know how to convert this to bearing in QGIS.
On Thu, Apr 8, 2021 at 3:28 PM carlos h <[email protected]
<mailto:[email protected]>> wrote:
Hello, for example have this in the attribute table:
https://ibb.co/wWn4PfM <https://ibb.co/wWn4PfM>
What I need is to have the bearing in the polygon's attribute table.
Thanks
CA
image.gif
El jue, 8 abr 2021 a las 10:49, Ujaval Gandhi
(<[email protected]
<mailto:[email protected]>>) escribió:
Can you elaborate with an example? It's not clear what the
bearing would be for a polygon.
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Ujaval Gandhi
Spatial Thoughts
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On Thu, Apr 8, 2021 at 8:50 PM carlos h
<[email protected] <mailto:[email protected]>>
wrote:
Hello, nice to write here.
How can I generate the bearing in the attribute table
of a polygon? the bearing not in azimuth, but for
example N30E etc
Thanks
CA
image.gif
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