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1.
A Mesh-Down is the geospatial location based equivalent of a Web 2.0 MashUp. Mixing mesh data from multiple sources to show a unique facet of a unique place in space and time. Usually on a mobile device or kiosk.

Mesh data is location based data that is delivered not in lists but in polygons. Maps, local info, and geospatial data.
Everywhere I go I get the same meshdown of people, shops, a few pizza places and some new kind of thing I should point my iPhone at.
by Hegemony Snicket October 22, 2011