Neartype is a mapping platform I wrote between 2016 and 2017 allowing its user to visualise and explore publicly geo-tagged data in the locality. You could use Neartype to see what was being shared within a local area. This was visualised on a map on Android mobiles. Data lookups were made for a collection of sources including Flickr, Twitter, Yelp and geo-RSS feeds.
Available at Google Play Store.