I am attempting to fully automate the process of georeferencing a load of .png files - i have xml file containing the co-ordinates - but how can i use them?
Does anyone have any advice?
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I assume you will have to create a script in ModelBuilder.
The georeference tool has a way to load the match pairs from txt file.
The format is simple...
1359096.642582 353463.253614 1343639.244522 360489.343642
1513436.420187 348310.787594 1531938.457260 360957.749644
source xy, and map xy.
You should also specify the transformation type. That will depend on how many points you have for each image. 1st, 2nd, or 3rd order polynomial or adjust.
If you are able to convert those PNG images to TIFF, using QUAD-G would be an option. Our recent project was able to georeference tens of thousands of map sheets in a supervised-automated workflow in a short period of time.
The link to the program files and documentation can be found here: https://geography.wisc.edu/quad-g-automated-georeferencing-project/
The program is free and open-sourced, and the files read quickly into ArcGIS Desktop.