Image Geo-Referencing /Image GeoRecitification

Working with Images (Map and Charts) Digital or Paper Scanned and putting them in the proper place on a map

It is pretty easy and straightforward to use QGIS to georeference raster images.  There is a georeference plugin that is installed by default.

To use it:

• Go to the Plugins menu, Manage Plugins, and turn on the Georeferencer GDAL plugin.
• Load your layer containing the control points the raster is to be tied to
• In the Plugins menu go to the Georeferencer entry and select Georeferencer

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  In the Georeferencer window load the raster to be georeferenced Click the “Add Point” button, then select your first control point on the raster In the window that pops up click the “From Map Canvas” button In QGIS use the “Toggle Editing” button, it looks like a pencil, to select the corresponding control point Go back to the Georeferencer window to select the next control point.  You’ll need at least 3 points Once you have all your points click the “Start Georeferencing” button in the Georeferencer window From the new window that pops up you can set your coordinate system, decide if you want a seperate world file, and if you want a pdf showing a report of the actions performed among other things

Georeferencing Extracted Google Earth Imagery in QGIS

From  Mark Lama  Published on Mar 19, 2013