Abstract
The map mashup is an online cartographic representation created by combining two or more pre‐existing data sources gleaned from the Internet, via either data scraping or querying an application programming interface (API), with a web map. The rising popularity of locationally aware social media and their associated APIs has resulted in an abundance of mappable data and a steady increase in the popularity of map mashups. These novel maps provide the opportunity to identify new patterns in the data that might not have otherwise been legible, but not without raising a number of legal and ethical debates including issues around data ownership, representation, and privacy. This entry provides a brief history, highlights the key issues and arguments surrounding map mashups, and provides a number of key historical and current examples of the genre.
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