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Shelton719

: GIMP, match images based on shared point I am not a graphics design person and I think I may be looking for the correct language to ask the question more than anything. I have two maps that

@Shelton719

Posted in: #Gimp

I am not a graphics design person and I think I may be looking for the correct language to ask the question more than anything. I have two maps that I cannot get to match up (scales are incorrect or they were scanned incorrectly.

On the maps there are common points shared by both e.g. a building or an intersection.

I would like to match them up in GIMP and export one large map. I am a GIS person, this is easy in gis but it struggles to bring the images together.

Is there a tool in GIMP that I can use to say here on this image is equal to here on this other image. If so I would greatly appreciate some help!

on the image below you can see a city hall polygon common between the two, i want to match that up with say an intersection on the other side.

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@Speyer780

Take the new map to the separate layer over the old map in the background layer and set the top layer to the "Difference" mode. Then using the GIMP transformation tools you can perfectly match the maps.
Actually you may try not only the "Difference" mode, but others, too, depending on the details that you match, but the "Difference" is perfect exactly for your case if the colors of the maps are similar (ideally if they are same).

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