<div dir="auto"><div dir="auto">Hi,<div dir="auto"><br></div><div dir="auto">Another possible solution it's to create a custom projection where you include the false origin information (false northing and false easting. Then set your layers to use that custom projection.</div><div dir="auto"><br></div><div dir="auto">For more information on how to create a custom projection in QGIS, check this page of the official documentation:</div><div dir="auto"><br></div><div dir="auto"><a href="https://docs.qgis.org/3.4/en/docs/user_manual/working_with_projections/working_with_projections.html#id12" target="_blank" rel="noreferrer">https://docs.qgis.org/3.4/en/docs/user_manual/working_with_projections/working_with_projections.html#id12</a></div><div dir="auto"><br></div><div dir="auto">For more information about the false northing and easting, check PROJ documentation:</div><div dir="auto"><br></div><div dir="auto"><a href="https://proj.org/usage/projections.html?highlight=false%20north#false-easting-northing">https://proj.org/usage/projections.html?highlight=false%20north#false-easting-northing</a><br></div><div dir="auto"><br></div><div dir="auto">Alexandre Neto</div><div dir="auto">QGIS Support</div><div dir="auto"><a href="http://www.qcooperative.net">www.qcooperative.net</a></div><div dir="auto"><br></div><div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">A domingo, 17/11/2019, 10:10, Lens Paul <<a href="mailto:paul.lens@gmx.com" target="_blank" rel="noreferrer">paul.lens@gmx.com</a>> escreveu:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p>Hi Andrea,<br>
</p>
<p>False origins happens often with local topographical surveys,
with also a false altitude origin. Architectural plans are
sometimes even more tricky: rotated, or with a centimetric or
millimetric scale instead of a metric scale. A way is to transform
the data with a CAD software when available. Even then, problems
can arise e.g. when rescaling some objects.</p>
<p>I suppose a workaround in your case would be to use the "move"
command and to snap to a point drawn at the correct coordinates.
This could be cumbersome when there are many layers to edit, which
is often the case, unless you import the dxf as a unique layer....</p>
<p>If your data consist merely of point data (no polylines), it
should be possible, after conversion of the dxf in a shapefile, to
create the X, Y attributes using the field calculator, and to
recalculate these attributes with the same tool. <br>
</p>
<p>In the case of polylines, there is the possibility to extract
vertices. But I do not know if there is a possibility to recreate
the polylines after the recalculation of the X, Y attributes.<br>
</p>
<p>Dxf conversion is a complicated subject. The evolution of the
capabilities of QGIS in that field is amazing. Many thanks to the
developers for that.<br>
</p>
<p>Hope this helps,</p>
<p>Paul<br>
</p>
<div>Le 13/11/2019 à 14:04, Andrea Peri a
écrit :<br>
</div>
<blockquote type="cite">
<div dir="auto">Hi,
<div dir="auto">We have a dxf containings geograph data in
false.origin .</div>
<div dir="auto">I'm searching a solution to put a kind of origin
(x,y) to sum to every point of the data. Is possible to set an
<a href="http://origin.to" rel="noreferrer noreferrer" target="_blank">origin.to</a>
a dataset in qgis ?</div>
<div dir="auto"><br>
</div>
<div dir="auto">Thx.</div>
<div dir="auto">Andrea.</div>
<div dir="auto"><br>
</div>
</div>
<br>
<fieldset></fieldset>
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