I have 8 terabytes of imagery that is in either lon/lat or UTM projection that I will be using for the basis of large scale topographic maps.
I have been studying the differences between Mercator and Web Mercator, but I am still not sure what projection is more suitable for large scale (scales between 1:24k - 1:63k) topographic maps. I do understand that Mercator is conformal unlike Web Mercator which seems like an advantage.
I would like to project these datasets in UTM as I understand that is the recommended projection by United Nations Cartography Committee for topographic maps because it minimizes angular distortion at large scales (and at detail greater than 1:24k) - and because about half of my data is already in UTM.
At the same time I would like the ability to seamlessly zoom from a large geographic area (~1:250k up to 1:24k. That makes the UTM zones problematic as I will not have the capability of reprojecting adjacent UTM zones into a common UTM zone on-the-fly.