Odd landlord access question

scarlett

I thought that a landlord had to legally provide 24 hour written notice when he needed to enter the apartment. Well, OK, but I live in a small three unit place and the main unit is the landlord and his family. So when he randomly showed up knocking on my door yesterday I wasn't going to tell him he couldn't come in. He said this guy who was with him needed to take some pictures. The photog had one of those square footage measurers (looks like a miniature unicycle). He took pics of the kitchen, living room, hall and bathroom. I asked that they not take pics of our bedrooms because there were dainties all over the place.

Could this be for insurance purposes? My paranoid self wants to believe that, and not that he wants us to leave and is going to relist the apartment.

Any thoughts on why this happened?