Good evening everyone!
I'm here to point out a possible bug in the Locations Discovered tab in the Pip-Boy.
It seems as if there is absolutely no cohesion with regards to how many places you can actually "discover" according to your Pip-Boy. After countless amounts of time researching the possible locations within the Commonwealth, there is no definitive answer that would allow players to know when they've discovered everything. Because I'm new to the forums, I do not have permission to post links yet, but I have a Reddit forum I created that shows other users reporting substantially more locations than myself. I also have an Imgur link that serves as evidence of a console user's Pip-Boy, side-by-side with my own, that has 342 locations discovered to my 325, yet when you look at our Pip-Boys, they are exactly identical with the exception of end-game map differentiation based on the faction you chose to side with. If anyone would like these links to see for themselves, please PM me!
It has come to my understanding that there are some instances where locations can trigger in your Pip-Boy twice. One instance is when a console user revisited the NH&M Freight Depot, even completing The Big Dig for Bobbi No-Nose in Goodneighbor, he tripped the discovery for the location even after having been there previously. This has led to some wildly different numbers throughout the Fallout universe as to exactly how many locations there are, and since I have seen no evidence that there are faction-specific locations that can't be accessed (The Institute is accessed through the main story, as is the Prydwen and North End Church), I'm led to believe a scripting error within certain cells re-trip the EXP trigger you get for discovering a new location.
My locations stand at 325, and my Pip-Boy is identical to one who found 342. We're both playing vanilla Fallout with absolutely no mods or console commands. Having put in 445 hours to the game and being Level 103, and not seeing the 17 blips on the map that would signify I haven't explored an area thoroughly enough, combined with the lack of cohesion has led me to believe some people are actually experiencing bugs as to what trips the Locations Discovered count on the Pip-Boy and what doesn't... I'm at almost a complete loss. If anyone has more insight to this, please feel free to comment below, as I would like to have one cohesive, uniform source for people picking up Fallout 4 as to the maximum amount of locations within the game so that they may have a good reference for their exploring. If it's confirmed to be a bug, this would be very helpful to know as well.
Thank you for reading this post!