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Notes: Darwin Core location terms can be grouped into three subcategories - geographic terms, verbatim coordinate terms, and georeference terms.
Geographic terms include
A good reference for place names is the Getty Thesaurus of Geographic Names (TGN), which can be found at http://www.getty.edu/research/conducting_research/vocabularies/tgn/.
Administrative boundary files can be obtained from the Global Administrative Areas (GADM) data set at http://biogeo.berkeley.edu/gadm/.
MARC records for geographic names, including URIs, can be found at http://id.loc.gov/vocabulary/geographicAreas.html.
Verbatim Coordinate Terms
Verbatim coordinate terms include:
The terms beginning with verbatim are meant to capture the original record of the coordinates of the Location. verbatimCoordinates is meant to capture coordinates that have not or cannot be separated into the verbatimLatitude and verbatimLongitude. If the coordinates can be separated, they should be, since there is less chance to misinterpret the content. The verbatimCoordinateSystem and the verbatimSRS both refer to the values in verbatimLatitude and verbatimLongitude, or to the value in verbatimCoordinates.
Further detailed explanations of the terms associated with georeferences (spatial descriptions of place using points, circles, lines, polygons, etc.) can be found in the Guide to Best Practices for Georeferencing http://www.gbif.org/prog/digit/Georeferencing.