This document discusses mobile data and maps, and place attachment. It provides examples of how mapping is viewed through data from mobile apps and sensors that can inform maps and disambiguate places. Examples shown include Flickr photo polygons in Hong Kong from 2008 and 2013, Uber's complete map of New York City updated every 24 hours, and indicative metrics on location queries from ad tech companies. The document discusses how analyzing patterns in device data can form geo-behavioral attributes, and how crowdsourced mapping systems incorporate live user data that is then curated by mapping communities.