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How can I georeference png images using QGIS, running on OSX?

I've looked at ExifTool, and the plugins GeoTag and Import Photos + Photo2Shape. These tools (and other answers) as far as I can tell all use georeferenced images or images with EXIF data. I would like to load the png somewhere, and drag it around on a basemap from OpenStreeMap to position it where it should be. I know the general location, and just need to position it.

(I think I know the projection, but will find out if that is the case. The images are of an area ~500m x 200m so the projection variation will hopefully not matter hugely if I am incorrect).

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marked as duplicate by RyanDalton, Fezter, iant, djq, whuber Apr 17 '13 at 16:23

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
Are you talking about aerial photos here? –  R.K. Apr 17 '13 at 4:10
    
no, they are maps but in png format –  djq Apr 17 '13 at 4:16
    
Can you post a sample image? –  R.K. Apr 17 '13 at 4:20
    
I agree, my question is a duplicate. Wondering if there is a way to make the other question a little easier to find? I did try many search terms. –  djq Apr 17 '13 at 15:02
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1 Answer 1

up vote 3 down vote accepted

You are most likely looking for the QGIS Georeferencer Plugin (and toolbar). There is a good tutorial on using it called Tutorial: Georeferencing Topo Sheets, Topo Maps, Satellite Image or Scanned Maps in QGIS

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thank you, this is exactly what I needed. –  djq Apr 17 '13 at 15:02
    
@djq, Please mark the answer as "accepted" to close this question out. Thanks. –  RyanDalton Apr 17 '13 at 21:00
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