[Qgis-user] Advance Digitising Tools- compass bearings

[Jeremy Jackson]

On 2024-05-17 07:00, C Hamilton via QGIS-User wrote:
> Phil,
>
> The Shape Tools plugin has an "Azimuth distance digitizer" and for what you are talking about an "Azimuth distance sequence digitizer". With the latter function you click on a starting location and then give a list of azimuth, distance sequences. I have used this for old surveys like this. There is also an declination offset just in case your surveys were using magnetic north and not true north. In that case you have to look up what the
A related question, what about grid to ground conversions and vice-versa, are there plugins which support this?  Surveys here in Canada always specify a "combined scale factor", which is tedious to apply manually to each vertex when digitizing.
> declination offset was for your 1880s date.
>
> Regards,
> Calvin
>
> On Thu, May 16, 2024 at 9:50 PM Philip Ryan via QGIS-User <qgis-user at lists.osgeo.org> wrote:
>
>     Hello,
>     I am trying to digitise a series of old gold lease "portion plans" produced in the 1880s in Australia by a mining surveyor using a compass and chain. The data for each gold lease includes a table of  1) compass bearings in degrees and 2) distance measurements in links (0.2 m) for each vertex of the lease polygon (mostly a rectangle or trapezoid but sometimes more complex).
>     The Advance Digitizing Tools would seem to be ideal for this data except for the angle measure (a) which I can't input as a compass bearing (0-360 deg). The current settings with 90 deg E as the zero makes conversion of compass bearings very tedious.
>     Is it possible to change the angle variable (a) to a compass bearing?
>     Regards,
>     Phil Ryan
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