Thanks @Jarekt, I've been trying to figure it out based on the other modules you mentioned, especially [[Module:Artwork]], but nothing works even when I copy and paste all the lines that your comments say are about harvesting Wikidata to populate the rows. I just get empty rows. I've been editing in [[Module:Map/sandbox]] and testing it in a page called [[Template:Map/sandbox/infopull]] but I'm not getting anywhere. The files I test just end up with a blank template no matter what I do. If you (or anyone) get a chance to look and see what I'm doing wrong, I would appreciate it. I'll keep trying next week when I can devote more hours to it again.

In T252259#6122296, @Susannaanas wrote:

I have not been able to locate the code that reads and writes to Commons yet.

In T252259#6122295, @Susannaanas wrote:

I have worked on this page to display a bit of the FRBR division as well as mark properties that are available in the Map template https://www.wikidata.org/wiki/Wikidata:WikiProject_Maps/Historical_map_properties

@Susannaanas I'm glad you think so! This is Wikidata-to-Commons-properties proposal I did recently for a work project, although I've removed institution-specific identifiers. Is it helpful in this context?

Hi everyone! Thank you for the attention to this and thanks for letting me pull you in, @Susannaanas and @Jarekt. To answer the question about usages, what I'm hoping for is a way to set up a workflow whereby Wikidata fields that I spend a lot of time working on when I create map items, such as the coordinates, scale, etc. that are map format-specific, can get filled quite easily by someone who has an image of the map they want to upload to Commons but may not have all the cataloging information (which I have put into Wikidata) on hand. My library, like so many in these days, is trying to come up with ways that people with varying levels of technical expertise and subject matter knowledge can get involved with helping to increase access to materials through Wikimedia platforms. Therefore, I'd want people who are not thinking about metadata as constantly as I am still to feel that they could contribute, if they just want to upload images and add some categories and be on their way. Does this make sense? I don't want to bore you all but I can elaborate as needed.