[Qgis-user] Something to use found - RE: How to "Affine Transform" and rotate at a given point

[Jeff Sonnentag]

Something to use was found based on this:

https://gis.stackexchange.com/questions/322262/rotating-shape-around-defined-point-instead-of-centroid-in-qgis

It's handy to know you can hold CTRL and click to set the point rotation occurs around.


From: Qgis-user <qgis-user-bounces at lists.osgeo.org> On Behalf Of Jeff Sonnentag
Sent: Friday, April 9, 2021 10:21 AM
To: qgis-user <qgis-user at lists.osgeo.org>
Subject: [Qgis-user] How to "Affine Transform" and rotate at a given point

So basically we have some "engineering" somebody just made up their own coordinate system for that arrived as a DWG and was converted to a DXF in order to get it to appear in QGIS (3.16.5).  At first I thought it was in feet but aligning a corner showed that wasn't right and it wasn't in inches either.

After figuring out and setting a Scale Factor and then re-aligning to a corner things are OK except for a rotation that needs to occur.  It needs to occur around the corner match point.  Is that even possible in QGIS?  It is all built into the transform function/tool in ArcMap so all you have to do is set where X and Y are supposed to come from and their final destination and the rotation occurs around that reference point.  Is there a way to do that in QGIS?

Setting a rotation "around the z-axis" sends things off into the wild blue yonder. . . .
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