USA Definitions

Name	Type	Length/ Decimals	Description
Feature ID	Number	10	Permanent, unique feature record identifier and official feature name as defined in INCITS 446-2008, Identifying Attributes for Named Physical and Cultural Geographic Features (Except Roads and Highways) of the United States, Its Territories, Outlying Areas, and Freely Associated Areas, and the Waters of the Same to the Limit of the Twelve-Mile Statutory Zone.
Feature Name	Character	120
Feature Class	Character	50	Definitions
State Alpha	Character	2	The unique two letter alphabetic code and the unique two number code for a US State as specified in INCITS 38:200x, (Formerly FIPS 5-2) Codes for the Identification of the States, the District of Columbia, Puerto Rico, and the Insular Areas of the United States. Some feature records in State files will display State Alpha and Number Codes for a State other than that requested. This is not an error. It indicates that the primary coordinates for the feature reside in another State, but that the feature crosses into and is included in the specified State. This also means that the feature record is included in both State files.
State Numeric	Character	2
County Name	Character	100	The name and unique three number code for a county or county equivalent as specified in INCITS 31:200x, (Formerly FIPS 6-4) Codes for the Identification of Counties and Equivalent Entities of the United States, its Possessions, and Insular Areas
County Numeric	Character	3
Primary Latitude DMS	Character	7	The official feature location as defined in INCITS 446-2008, Identifying Attributes for Named Physical and Cultural Geographic Features (Except Roads and Highways) of the United States, Its Territories, Outlying Areas, and Freely Associated Areas, and the Waters of the Same to the Limit of the Twelve-Mile Statutory Zone. NAD 83 DMS-degrees/minutes/seconds DEC-decimal degrees. Note: Records showing "Unknown" and zeros for the latitude and longitude DMS and decimal fields, respectively, indicate that the coordinates of the feature are unknown. They are recorded in the database as zeros to satisfy the format requirements of a numerical data type. They are not errors and do not reference the actual geographic coordinates at 0 latitude, 0 longitude.
Primary Longitude DMS	Character	8
Primary Latitude DEC	Number	11/7
Primary Longitude DEC	Number	12/7
Source Latitude DMS	Character	7	Source coordinates of linear feature only (Class = Stream, Valley, Arroyo), NAD 83 DMS-degrees/minutes/seconds DEC-decimal degrees. Note: Records showing "Unknown" and zeros for the latitude and longitude DMS and decimal fields, respectively, indicate that the coordinates of the feature are unknown. They are recorded in the database as zeros to satisfy the format requirements of a numerical data type. They are not errors and do not reference the actual geographic coordinates at 0 latitude, 0 longitude.
Source Longitude DMS	Character	8
Source Latitude DEC	Number	11/7
Source Longitude DEC	Number	12/7
Elevation	Number	5	Elevation in meters above (-below) sea level of the surface at the primary coordinates from National Elevation Dataset
Map Name	Character	100	Name of USGS base series topographic map containing the primary coordinates.
Date Created	Date		The date the feature was initially committed to the database.
Date Edited	Date		The date any attribute of an existing feature was last edited.





USA Definitions SOURCE: www.nga.mil

File Format for States, Territories, and Associated Areas of the United States