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I'm working with QGIS and I'm trying to geo-reference a tobin lease map. The map datum: NAD27, projection: UTM Zone 14N. The process to georeference is fairly straight forward but the results I'm getting is off. The program is basically mirroring the image. I have tried it three times with the same results. I'm not sure what I am doing wrong.

  • I've seen this too in the past, and would like to hear an answer. If I recall correctly though, it had to do with the CRS not being set properly. Can you confirm that your map CRS is properly set? Oct 31, 2013 at 17:49
  • it appears to be right. Nad27/ UTM zone 14N. The CRS code in QGIS is EPSG:26714
    – david
    Oct 31, 2013 at 19:15
  • can you post an image showing the gcp table? Nov 1, 2013 at 14:55
  • there is a screen shot of the table. I have tried with more points and it still have not worked.
    – david
    Nov 4, 2013 at 0:47

1 Answer 1


Located in the USA, you have to put the x values (West) negative (as East) when they are given in degrees.

Looking at your screenshot, I think you missed that step.

  • 1
    To explain further, X is the longitude. If you're putting in positive longitudes, you're moving the object to central Europe, but also reversing the "direction" of longitude.
    – BradHards
    Nov 4, 2013 at 7:39
  • That was it. Thanks for the info. I had thought of that earlier and tried to manual add the negative in the table. I guess it did not effect the CRS. I didn't know if the program would automatically add the negative based on the CRS. I guess not. Thanks again guys. This will save me a lot of time.
    – david
    Nov 4, 2013 at 14:35

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