The body of geographically referenced information that is increasingly used to organize and deliver content over the Web; examples include Google Earth, Google Maps, Live Search Maps, Yahoo Maps, and NASA World Wind, which are raising awareness of geography and location as a means to index information. Much of this locational-based data is supplied by users with no formal background in geography or cartography who ‘voluntarily’ contribute spatial information over the Web. This is the ‘crowdsourcing’ of geographical information—that is to say the practice of harnessing the ‘power of the crowd’ to create collectively represents a pronounced shift in what constitutes ‘geographic information’ at all levels of data, technologies, and practices. The impetus for this shift is not geographical per se. Its emergence and development have been overwhelmingly driven outside academic geography by the Web business and computing communities. Leszczynski (2012) PHG 36, 1, 72 explains it all.