[GIS] Using Georeference information stored in tfwx (from ArcGIS) in QGIS

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I have georeferenced some images (ArcGIS -> Update Georeferencing) which creates a *.tfwx file with the new parameters for georeferencing.

I renamed it to *.tfw but QGIS is not able to read the georeferencing information.

Does anybody has any useful tips how to fix this?

Best Answer

tfw and tfwx are not the same. The information in aux.xml gets lost.

See these links:

http://forums.arcgis.com/threads/48357-tfw-v.s.-tfwx

http://walt.therices.org/index.php/2009/09/georeferencing-dpi-quirks/

As a workaround, rectification in Arcgis should work.

Related Solutions

Raster – How to Generate TFW Files for a List of Images in Batch

It isn't nice code, but for your specific circumstance, here is some python that should save typing them out by hand:

f = open('list.txt', 'r')
lines = f.readlines()
for line in lines:
    lineparts = line.split(' ')
    outfile = open(lineparts[0], 'w')
    for i in range(1, 4):
        outfile.write(lineparts[i] + '\n')
    outfile.write(lineparts[4] + lineparts[5] + '\n')
    for i in range(6, 8):
        outfile.write(lineparts[i] + '\n')

(real code would sanity check, but I assume you can check the results)

[GIS] Georeference IMG file in QGIS

If you use Bing Maps with openlayers plugin, the project projection must be EPSG:3857. When georefrencing by adding control points from the canvas, the target projection of the raster must have the same projection.

If you want UTM 17N, you have to reproject the georeferenced image in a second step with Raster -> Projection -> Transform.

Best Answer

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Raster – How to Generate TFW Files for a List of Images in Batch

[GIS] Georeference IMG file in QGIS

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