[Qgis-user] FW: RE: Labeling Lines with Bearings

[Springfield Harrison]

Aha, thanks Kirk.  That's why my lines are not as I intended. This 
probably affects making the lines with the Shape Tool.

Yes, it seems to draw in grid north, angle_main reports in True DD.  The 
map is 26907, UTM 7N.

I calculated the difference between as drawn and as reported and used 
that to change the input figure.  It works OK, not exact as the 
convergence varies with longitude, I believe.

Thanks Kirk . . . .

--------
Cheers, Spring



On 03/Feb/2022 02:59, kirk wrote:

>
>
>
>
> Sent from my Galaxy
>
>
> -------- Original message --------
> From: kirk <kirk at nortekresources.com>
> Date: 2022-02-03 5:55 a.m. (GMT-04:00)
> To: Springfield Harrison <stellargps at gmail.com>, 
> qgis-user at lists.osgeo.org
> Subject: RE: [Qgis-user] Labeling Lines with Bearings
>
> Hi Spingfield.
>
> I use a little routine and the core if it is:
>
> main_angle($geometry) which you can use in field calculator.
>
> Note this will give you the azimuth in relation to grid north for the 
> coordinate system you are using.  For projections, you will need to 
> lookup or calculate convergence to get the adjustment to true north.
>
> Kirk Schmidt
>
>
>
> Sent from my Galaxy
>
>
> -------- Original message --------
> From: Springfield Harrison <stellargps at gmail.com>
> Date: 2022-02-02 7:30 p.m. (GMT-04:00)
> To: qgis-user at lists.osgeo.org
> Subject: [Qgis-user] Labeling Lines with Bearings
>
> Hello,
>
> I need to put the line direction (azimuth) into a line label. Some
> searching has not come up with anything.
>
> Is there a way?  Thanks very much . . . .
>
> --------
> Cheers, Spring
>
>
>
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