Hi Peter,

It's me again! :-) Just making sure that you are doing the right thing.

By the looks of it, you’re a local who is checking all the addresses on BTCmap in your area. Wonderful, it’s important work, so thank you for that!

Regarding the use of the check date tags: If you physically (so in person) visit each shop, please use the survey:date tag.

If you only visit the company website and update data like opening hours, or add their website and/or Instagram account, then please use the check_date: tag.

If you physically visited the shop AND checked if they still accept Bitcoin, then please use both the survey:date tag AND check_date:currency:XBT.

The edits I make are almost always based on the forms we receive through our BTCmap website. 
https://btcmap.org/tickets

Since I always check the company website, I update both the survey:date AND check_date:currency:XBT tags. If I recently updated the company data and we receive a ticket from someone informing us that the merchant still accepts Bitcoin, then I ONLY update the check_date:currency:XBT tag.

Hopefully, this clarifies things for you.

Edwin