Do you be have any idea how tolling scraping these data is for the servers?
If this is something you want to keep working on, maybe it could be combined with a sort of Threadiverse fund raiser: we collectively gather funds to cover the cost of scraping (plus some for supporting the threadiverse, ideally), and once we reach the target you release the map based on the newest data and money is distributed proportionally to the different instances.
Maybe it's a stupid idea, or maybe it would add too much pressure into the equation. But I think it could be fun! :)