Originally Posted by cal40john
So you're saying that because they've been updated they no longer are considered to have come from scanned material?
No, I never said that. In fact, I specifically said that the raster files began life (decades ago) as scans of printed charts, so of course they originally came from scanned material.
I was simply trying to clarify, for anyone who did not realize it, that NOAA has long since finished scanning in all of the paper charts. They don't do that anymore. Scanned the last paper charts more than a decade ago. They now maintain the raster files as the "master" and generate paper charts by simply printing out the raster images.