The Tate Gallery are crowdsourcing location data for their collection. This means that the public can locate the subjects of representional artworks on the map and share this with the Tate. This kind of geodata is very useful for digital art history, as placing an artwork on the map palces it in the cultural and economic landscape of the time as well as the geographic one. It’s also useful in data mash-ups for local history projects and driving tourism.
This data will eventually make its way into Tate’s CC0 Open Data collections dataset. And the source code is available on Github under the GPLv3. Open Data and Free Software! Tate keep getting it right.