I'm looking for some help here. I'm working on a project scanning hundreds of maps at our library and georeferencing those image files (TIFF and JPEG).
Somewhere along the line, the coordinate system for the basemap I have been using got changed from WGS84 (a geographic coordinate system) to WGS84 Web Mercator - Auxiliary Sphere (a projected coordinate system). I have about 100 images that are georeferenced with the wrong coordinate system.
Rather than re-doing all that work by hand, I am just writing a quick script to run through the world files and convert the values with some calculations. I've got the math to go from the Web Mercator projection to WGS84, but I can't get my mind around how to fix the pixel size (lines 1 and 4).
Can anyone help me out?
