What is a SDI?
nThe term gSpatial Data Infrastructureh (SDI) is often used to denote the relevant base collection of technologies, policies and institutional arrangements that facilitate the availability of and access to spatial data.
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nThe SDI provides a basis for spatial data discovery, evaluation, and application for users and providers within all levels of government, the commercial sector, the non-profit sector, academia and by citizens in general.
•(Source: SDI Cookbook V.2, 25 January 2004)