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<p>Hi All:<br>
</p>
<p>I always add a scale bar to a printed map so that if there is
variaition between the pdf/print configuration, It can always be
confirmed on the final printed map. <br>
</p>
<p>Kirk Schmidt<br>
</p>
<div class="moz-cite-prefix">On 5/27/2021 4:27 AM,
<a class="moz-txt-link-abbreviated" href="mailto:j.huber@post-ist-da.de">j.huber@post-ist-da.de</a> wrote:<br>
</div>
<blockquote type="cite"
cite="mid:bf13cd30-b19e-3206-dfe1-cf610c50134a@post-ist-da.de">
<div class="moz-cite-prefix">Hi John,</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">as I understand it, you created the
base map in QGIS. If you use the measure tool in QGIS to get the
distance between two distinct features in the map (e.g. road
intersections) and then measure the same distance on the printed
base map with a ruler, it should be possible to calculate the
scale. Maybe use two distances, one aligned more or less
horizontally and one vertically, to check if the scaling is
proportional.</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">As Andreas pointed out, it is
probably a problem with the settings when the PDF was printed.
In my experience it is a good idea to go to print shops usually
working for architects and engineers since they are familiar
with the importance of scaling (for advertising etc. it is more
important that the whole content is printed, so that scaling
might be used to fit the output to the printable area without
potential cropping).</div>
<div class="moz-cite-prefix">You can print directly to a plotter
in QGIS if you have access to the device, avoiding the PDF
detour.<br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">EPSG 2264 should be fine. Units
should be US feet.<br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">Regards<br>
Jochen<br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">Am 27.05.21 um 07:15 schrieb John
Antkowiak:<br>
</div>
<blockquote type="cite"
cite="mid:301502554.636673.1622092502691@mail.yahoo.com">
<div class="yahoo-style-wrap">
<div dir="ltr" data-setdir="false">Hi. This plan was too
simple to fail - but it failed. The charity whose project
this is needed a large (that is... massive) paper wall map
on which to plot and rethink its delivery driver
assignments. Both drivers and delivery addresses are subject
to change from week to week but it's not a pizza delivery;
this is a regular run to supply people in a bad way. So the
plan was to print the base map (roads and road names and
county boundaries only) and then print 8.5 x 11 address maps
with parcel data and orthos. That way, the base maps don't
change but the physical parcel layer is flexible. (On top of
that is a third paper layer indicating which drivers go
where so someone can stand back and take in the whole
picture graphically. Not a cutting-edge state of the digital
art solution, but not everyone is cut out for that. It is
what it is.) In order for this to work, the parcel maps have
to be the same scale as the base map. Which they were... in
QGIS.</div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">We have to convert all the
maps to PDF to print them, and we had to send the base map
PDFs to FedEx/Kinkos to print the 9 map grid panels at 42"
by 62" each. </div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">When we got the big base
maps up on the wall, we discovered the scale did not match
the 8.5" x 11" parcel maps output to PDF and printed from
home. It's not off by a lot, but it's enough to be painfully
obvious from a single standard size sheet of paper. I don't
know how to reverse engineer the big map scale precisely
enough to enter a new scale number in the QGIS Print Layout.
I didn't foresee it because this never would've been a
conceivable scenario at the engineering firm where I picked
up my meager GIS skills. (ArcMap sent a map directly to the
plotter without interim steps.) There was no scale bar on
the map. It shouldn't have been needed for this.</div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">Did something happen to the
map scale when QGIS output the map to PDF? Could the size of
the image on the pdf page have been adjusted manually or
otherwise when being sent to a plotter with 42" paper? Could
the image have been distorted horizontally differently from
vertically? For the life of me, I cannot trial-and-error
guess at a scale to enter. I've gone through dozens of new
8.5" x 11" test maps trying to guess the correct scale.</div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">Any ideas? </div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">Thank you all -</div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">John A.</div>
</div>
<br>
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</blockquote>
<pre class="moz-signature" cols="72">--
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
RR # 1
Thorburn, NS
B0K 1W0
Tel (902) 922.3607
Email: <a class="moz-txt-link-abbreviated" href="mailto:kirk@nortekresources.com">kirk@nortekresources.com</a>
Web: <a class="moz-txt-link-abbreviated" href="http://www.nortekresources.com">www.nortekresources.com</a></pre>
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