The Geographic Names Information System (GNIS) is the Federal standard for geographic nomenclature in support of the U.S. Board on Geographic Names. The Structures layer (STRUCTURE) in the GNIS Web Map Service contains all features in the database with Feature Class of Airport, Building, Church, Hospital, School, Post Office. See http://geonames.usgs.gov/domestic/feature_class.htm for feature class values and definitions. The STRUCTURE_FEATURE250 layer contains large features designated by the Geographic Names Office as ones that should be labeled on maps or displays with a scale of 1:250,000. See http://geonames.usgs.gov for additional information.
[Keywords: structure health Airport Building Church Hospital School Post Office GNIS ]