Hello Historians!

I'm volunteering with a very small, local museum/library/civic center/retirement home partnership to sort, digitize, and organize a lot of local, random photos. (Some have years, some have neighborhoods, some have full addresses, some have full dates, some have people's names, and I'm lucky if I get at least two of these identifiers.)

My question: Historians do you have any tips on creating a digital image/document numbering/naming identification system?

I'm making a Google spreadsheet and using Pisca, if that helps.

Thanks!