I have created a map from a picture. And now I have some more detailed pictures and georeferenced them. Is there any way to quickly access them later on.

I mean everything is fine with georeferencing. The picture is projected right where it shall be at the end. But I would like to know if there is a way to add some reference points or even delete some.

I know I could delete the picture and load the raster again and start from a new georeferencing.

So is there a possibility to edit georeferenced pictures?

  • Does some one know how to re-georeference a tif ? I want to readjust some picture. Thank you all – S Cicese Mar 24 '17 at 12:59
  • Sorry but thats no answer. – kwoxer Mar 24 '17 at 13:11
  • This does not really answer the question. If you have a different question, you can ask it by clicking Ask Question. You can also add a bounty to draw more attention to this question once you have enough reputation. - From Review – mgri Mar 24 '17 at 13:33

If you know that you can refine the GCP later, write the georeferencing result to a vrt file using the GDAL batch conmmandline export.

You can edit that later with any text editor, and add additional GCP's.

Re-georeferencing a tif is more complicated, because the first round you georeference ageianst pixel coordinates, while the second run uses the coordinates of the defined CRS. At least with the QGIS georeferencer.

  • Well that would a solution, but I think I'm then faster when I just do the whole thing again. Anyway thanks for the workaround and explainations. – kwoxer Feb 3 '15 at 14:13

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