[Qgis-user] Labeling Lines with Bearings

[Kirk Schmidt]

Hi Springfield:

You can place the python code in the 
C:\Users\User\AppData\Roaming\QGIS\QGIS3\profiles\default\processing\scripts 
folder on your local machine and then it will show up under scripts in 
the processing toolbox.

Kirk Schmidt

On 2/10/2022 4:03 AM, Springfield Harrison wrote:
>
> Hello Everyone,
>
> Thanks very much for the suggestions.  The main_angle option seem to 
> do the trick.
>
> I didn't try the Python code.  Not familiar with that side of things 
> although it is probably simple enough.  Could not find the recipe for 
> adding it to the plug-in list, which I presume is where it is supposed 
> to go.
>
> Thanks again, very helpful…
>
> --------
> Cheers, Spring
>
>
> On 04/Feb/2022 07:10, Kirk Schmidt wrote:
>>
>> Hi Springfield:
>>
>>
>> Sure it would , I have attached my little convergence tool. Just 
>> create a point in the area where you want to know the convergence at 
>> let her rip.  The vary last column is the convergence in minutes.  
>> So, depending on what side of the central meridian of your coordinate 
>> system you are, it will either be negative or positive. SO, I just 
>> used it yesterday for and area that is east of the meridian, UTM 
>> easting > 500,000,   therefore the resulting convergence was 22 
>> minutes, which need to be subtracted from the grid north value to 
>> obtain true north.  It is not a sophisticated workflow, but I only 
>> require it intermittently.
>>
>> I usually use NRCAN magnetic declination calculator (online) to 
>> verify the magnetic declination for the day.  But it seems to be 
>> offline. I convert everything to magnetic for field work and then 
>> there are no mistakes due to declination calculations and settings.
>>
>> Have fun
>>
>> Kirk
>>
>> On 2/4/2022 6:34 AM, Springfield Harrison wrote:
>>>
>>> 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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>> -- 
>> Kirk Schmidt, MScF, BScF, RPF
>> General Manager
>> Nortek Resource Solutions Inc.
>> 26 Church Road
>> Sutherlands River, NS
>> B0K 1W0
>> Tel (902) 922.3607
>> Email:kirk at nortekresources.com
>> Web:www.nortekresources.com

-- 
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
26 Church Road
Sutherlands River, NS
B0K 1W0
Tel (902) 922.3607
Email:kirk at nortekresources.com
Web:www.nortekresources.com
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