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Mismatch between Georeference & Scaled maps



Hi folks, please see the attached image. its a GeoImage underlayed behind a scaled NOAA marine chart. 

The chart is a PDF, scaled per its legend. Pulling dimensions off the PDF chart seems solid, in that they match measured markings on the chart, as well as input GPS coordinates land in the right places.


The Geoimage below is obviously showing a difference scale, measuring the same features on maps yields 23 miles, and 28 miles. That's pretty far off.


Any thoughts on why these two dont align?

Screen Shot 2022-05-23 at 10.33.37 AM.png

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