How to compute parameters for QGIS Affine transformation?

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I have a vector floorplan (DXF) that I've added to a blank project in QGIS using the Dxf2Shp plugin. I've been reading tutorials and StackExchange threads, but I can't seem to find out how to "georeference" my layer.

I'm assuming I can somehow select the corners of the building and set the lat/long.

My goal is to export a shapefile that I can use with TileMill and TileStache.

Edit

I realized that the project coordinates were actually lat/long coordinates:



And I need to use the "Affine (Rotation, Translation, Scale)" plugin to "place" my CAD drawing (Thanks @nhopton).

If anyone knows of a good tutorial for using that plugin, I'd be grateful!



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