New answers tagged scale
You can save the layer style as an sld and open the style in a text editor. Just copy and replace the values you want. But remember that sld does not keep all the qgis symbology. It is not 1 to 1. If you are confortable with editing text file then you will just need to search and replace the scale.
Your calculations appear to be sound. I suspect the problem is with the very first assumption: "the imagery is supposed to be to a scale of 1:250000" (emphasis mine). I know nothing of JOG-A or CADRG but I do know that, when it comes to displaying images on a computer screen, there are often many scale transformations that take place between the original ...
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