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<div class="moz-cite-prefix">On 2024-05-17 07:00, C Hamilton via
QGIS-User wrote:<br>
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cite="mid:CABPxTTrrdJaVENxF+WRBfW23-rvVq4Ktbr-iGz+rJ6juCM-1kA@mail.gmail.com">
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<div dir="ltr">Phil,
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<div>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 </div>
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</blockquote>
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.<br>
<blockquote type="cite"
cite="mid:CABPxTTrrdJaVENxF+WRBfW23-rvVq4Ktbr-iGz+rJ6juCM-1kA@mail.gmail.com">
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<div>declination offset was for your 1880s date.<br>
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<div>Regards,</div>
<div>Calvin</div>
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<div dir="ltr" class="gmail_attr">On Thu, May 16, 2024 at
9:50 PM Philip Ryan via QGIS-User <<a
href="mailto:qgis-user@lists.osgeo.org"
moz-do-not-send="true" class="moz-txt-link-freetext">qgis-user@lists.osgeo.org</a>>
wrote:<br>
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style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div class="msg-1476221510151755154">
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Hello,</div>
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style="direction:ltr;text-align:left;text-indent:0px;background-color:rgb(255,255,255);margin:0px;font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
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). </div>
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style="direction:ltr;text-align:left;text-indent:0px;background-color:rgb(255,255,255);margin:0px;font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
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.</div>
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style="direction:ltr;text-align:left;text-indent:0px;background-color:rgb(255,255,255);margin:0px;font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Is it possible to change the angle variable (a) to a
compass bearing?</div>
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style="direction:ltr;text-align:left;text-indent:0px;background-color:rgb(255,255,255);margin:0px;font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Regards,</div>
<div
style="direction:ltr;text-align:left;text-indent:0px;background-color:rgb(255,255,255);margin:0px;font-family:Aptos,Aptos_EmbeddedFont,Aptos_MSFontService,Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Phil Ryan</div>
</div>
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