I have a database with coordinates in WGS84 (4326) that all of them belong to Italy. Italy is split in two more or less equal UTM zones, 32 and 33. I need to transform those geographic coordinates to a projected system, but I don't want them to be in two different systems (ETRS89 UTM 32N AND ETRS89 UTM 33N), I want to keep them in a single representative SRID. My guess is that I should stick to something based on ETRS89.
I have the same problem with Mexico, which has several official UTM zones and I need to represent coordinates in just one. After a lot of searching, I found ITRF2008 LCC, but I don't know if that should be the one to go with.
So what should be the projected system to use for point representation and distance calculation for the whole country of Italy and Mexico? Is there a method to make this kind of decisions when you run into an area with several equal UTM zones? Is there a consensus about this?
It is clear that when a country has most of its area in a single UTM zone (like Spain), you just pick the one that covers the biggest area like asked here. What about these two countries?
Also, this is for professional use, so the chosen system should be something somewhat "official" or "standard" if possible.