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@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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