A name or code that uniquely identifies a geographic entity. Examples include province or district name for an administrative region; waypoint ID and latitude/longitude combination for a GPS point; P-code (place code) from the United Nations Office for the Coordination of Humanitarian Affairs (UN OCHA). Unique geographic identifiers are essential for distinguishing between individual geographic entities and ensuring the accuracy of attribute data for those entities, as non-unique identifiers can create confusion and produce errors during all phases of data use. (MEASURE Evaluation)
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