|
|
Metadata for the County Boundaries Map Layer
County Boundaries: Map Layer Description File
This map layer portrays the county boundaries of the United States. County names and
Federal Information Processing Standard (FIPS) codes are two significant pieces of
information associated with every polygon in this map layer. The information in the map
layer was compiled by the U.S. Geological
Survey from a variety of sources.
Metadata
What follows is very detailed technical information about this map layer. This is often
called metadata. Metadata (or "data about data") describe the content, quality,
condition, and other characteristics of data. Metadata are used to organize and maintain
investments in data, to provide information to data catalogs and clearinghouses, and to
aid data transfers. The Federal Geographic Data Committee
(FGDC) publishes the Content Standard
for Digital Geospatial Metadata. Many organizations within and outside of the federal
government have adopted the FGDC metadata standard and are using automated indexing and
serving mechanisms to provide access to their holdings through the Internet. Visit the FGDC Clearinghouse to
learn more about how metadata is used in clearinghouses and to search for other data sets.
- Identification_Information:
- Citation:
- Citation_Information:
- Originator: U.S. Geological Survey
- Publication_Date: 19990326
- Title: County Boundaries of the United States
- Publication_Information:
- Publication_Place: Reston, Virginia
- Publisher: U.S. Geological Survey
- Description:
- Abstract:
- This data set portrays the State and county boundaries of the United States, Puerto
Rico, and the Virgin Islands. The data set was created by extracting county polygon
features from the individual 1:2,000,000-scale State boundary Digital Line Graph (DLG)
files produced by the U.S. Geological Survey. These files were then merged into a single
coverage. This is a revised version of the June 1998 data set.
- Purpose:
- These data are intended for geographic display and analysis at the national level, and
for large regional areas. The data should be displayed and analyzed at scales appropriate
for 1:2,000,000-scale data. No responsibility is assumed by the U.S. Geological Survey in
the use of these data.
- Time_Period_of_Content:
- Time_Period_Information:
- Range_of_Dates/Times:
- Beginning_Date: 1972
- Ending_Date: 1999
- Currentness_Reference: Ground Condition
- Status:
- Progress: Complete
- Maintenance_and_Update_Frequency: Irregular
- Spatial_Domain:
- Bounding_Coordinates:
- West_Bounding_Coordinate: 170
- East_Bounding_Coordinate: -64
- North_Bounding_Coordinate: 72
- South_Bounding_Coordinate: 17
- Keywords:
- Theme:
- Theme_Keyword_Thesaurus: None
- Theme_Keyword: boundaries
- Theme_Keyword: county boundaries
- Theme_Keyword: States
- Theme_Keyword: State boundaries
- Theme_Keyword: Counties
- Theme_Keyword: County boundaries
- Place:
- Place_Keyword_Thesaurus:
- U.S. Department of Commerce, 1995, Countries, Dependencies, Areas of Special
Sovereignty, and Their Principal Administrative Divisions (Federal Information Processing
Standard (FIPS) 10-4): Washington, D.C., National Institute of Standards and Technology.
- Place_Keyword: United States
- Place:
- Place_Keyword_Thesaurus:
- U.S. Department of Commerce, 1987, Codes for the Identification of the States, the
District of Columbia and the Outlying Areas of The United States, and Associated Areas
(Federal Information Processing Standard 5-2): Washington, D.C., National Institute of
Standards and Technology.
- Place_Keyword: USA
- Place_Keyword: Alaska
- Place_Keyword: Alabama
- Place_Keyword: Arkansas
- Place_Keyword: Arizona
- Place_Keyword: California
- Place_Keyword: Colorado
- Place_Keyword: Connecticut
- Place_Keyword: Delaware
- Place_Keyword: District of Columbia
- Place_Keyword: Florida
- Place_Keyword: Georgia
- Place_Keyword: Hawaii
- Place_Keyword: Idaho
- Place_Keyword: Iowa
- Place_Keyword: Illinois
- Place_Keyword: Indiana
- Place_Keyword: Kansas
- Place_Keyword: Kentucky
- Place_Keyword: Louisiana
- Place_Keyword: Maine
- Place_Keyword: Massachusetts
- Place_Keyword: Maryland
- Place_Keyword: Michigan
- Place_Keyword: Minnesota
- Place_Keyword: Missouri
- Place_Keyword: Mississippi
- Place_Keyword: Montana
- Place_Keyword: North Carolina
- Place_Keyword: North Dakota
- Place_Keyword: Nebraska
- Place_Keyword: New Hampshire
- Place_Keyword: New Jersey
- Place_Keyword: New Mexico
- Place_Keyword: Nevada
- Place_Keyword: New York
- Place_Keyword: Ohio
- Place_Keyword: Oklahoma
- Place_Keyword: Oregon
- Place_Keyword: Pennsylvania
- Place_Keyword: Rhode Island
- Place_Keyword: South Carolina
- Place_Keyword: South Dakota
- Place_Keyword: Tennessee
- Place_Keyword: Texas
- Place_Keyword: Utah
- Place_Keyword: Vermont
- Place_Keyword: Virginia
- Place_Keyword: Wisconsin
- Place_Keyword: Washington
- Place_Keyword: West Virginia
- Place_Keyword: Wyoming
- Place_Keyword: Puerto Rico
- Place_Keyword: Virgin Islands
- Access_Constraints: None
- Use_Constraints:
- None. Acknowledgment of the National Atlas of the United States of America and (or) the
U.S. Geological Survey would be appreciated in products derived from these data.
- Point_of_Contact:
- Contact_Information:
- Contact_Person_Primary:
- Contact_Person: Steve Kambly
- Contact_Organization: U.S. Geological Survey
- Contact_Address:
- Address_Type: mailing address
- Address: 561 National Center
- City: Reston
- State_or_Province: VA
- Postal_Code: 20192
- Contact_Voice_Telephone: 703-648-5094
- Contact_Electronic_Mail_Address: skambly@usgs.gov
- Data_Quality_Information:
- Logical_Consistency_Report:
- No additional checks for topological consistency were performed on this data set.
- Completeness_Report:
- This data set includes county boudaries for all 50 States, Puerto Rico, and the Virgin
Islands. Data completeness generally reflects the content of the original DLG files.
- Lineage:
- Source_Information:
- Source_Citation:
- Citation_Information:
- Originator: U.S. Geological Survey
- Publication_Date: 1995
- Title:
- 1:2,000,000-scale Digital Line Graph Data - Boundaries
- Publication_Information:
- Publication_Place: Reston, Virginia
- Publisher: U.S. Geological Survey
- Source_Scale_Denominator: 2000000
- Type_of_Source_Media: CD-ROM
- Source_Time_Period_of_Content:
- Time_Period_Information:
- Range_of_Dates/Times:
- Beginning_Date: 1970
- Ending_Date: 1995
- Source_Currentness_Reference: publication date
- Source_Citation_Abbreviation: 2MILBD
- Source_Contribution: Spatial and attribute information
- Source_Information:
- Source_Citation:
- Citation_Information:
- Originator: U.S. Geological Survey
- Publication_Date: 1998
- Title: County Boundaries of the United States
- Publication_Information:
- Publication_Place: Reston, Virginia
- Publisher: U.S. Geological Survey
- Source_Scale_Denominator: 2000000
- Type_of_Source_Media: online
- Source_Time_Period_of_Content:
- Time_Period_Information:
- Single_Date/Time:
- Calendar_Date: 1998
- Source_Currentness_Reference: publication date
- Source_Citation_Abbreviation: ATLAS-CNTY
- Source_Contribution: spatial and attribute information
- Source_Information:
- Source_Citation:
- Citation_Information:
- Originator: U.S. Geological Survey
- Publication_Date: 1999
- Title: Hydrography Features of the United States
- Publication_Information:
- Publication_Place: Reston, Virginia
- Publisher: U.S. Geological Survey
- Source_Scale_Denominator: 2000000
- Type_of_Source_Media: online
- Source_Time_Period_of_Content:
- Time_Period_Information:
- Single_Date/Time:
- Calendar_Date: 1999
- Source_Currentness_Reference: publication date
- Source_Citation_Abbreviation: ATLAS-HY
- Source_Contribution: spatial information
- Process_Step:
- Process_Description:
- The 2MILBD file was originally digitized by the National Mapping Division based on the
sectional maps contained in 'The National Atlas of the United States of America' published
by the USGS in 1970. The sectional maps were updated during 1978-1981 and digitized in the
early 1980's. The data were updated again in the early 1990's by the USGS and published on
CD-ROM in 1995 as State DLGs. Using ARC/INFO software, the updated DLG optional format
files were converted to ARC/INFO coverages using the DLGARC command. Only county
boundaries and attribute information were extracted from the boundaries DLG layer for
inclusion in this national coverage. It was determined that county boundary lines that
crossed open water would be excluded for graphic purposes and that polygons that
represented islands would be attributed with the appropriate county information. The
individual State coverages were then merged together using the ARC/INFO command MAPJOIN.
"Slivers" created during the MAPJOIN process were identified and deleted using
the ELIMINATE command. In 1998, the delineation of the boundary of Mojave County, AZ was
corrected. Minor modifications were also made to boundaries in Alaska. The resulting data
set was ATLAS-CNTY.
- Source_Used_Citation_Abbreviation: 2MILBD
- Process_Date: 1998
- Source_Produced_Citation_Abbreviation: ATLAS-CNTY
- Process_Step:
- Process_Description:
- The spatial features were compared against the National Atlas hydrography (ATLAS-HY) and
modified where necessary. Incorrect attributes were corrected. Yellowstone County was
deleted and the boundary for Gallatin and Park Counties were adjusted absorb the area of
Yellowstone National Park. Puerto Rico and the Virgin Islands were added.
- Source_Used_Citation_Abbreviation: ATLAS-HY
- Source_Used_Citation_Abbreviation: ATLAS-CNTY
- Process_Date: 1999
- Spatial_Data_Organization_Information:
- Indirect_Spatial_Reference:
- U.S. Department of Commerce, 1987, Codes for the Identification of the States, the
District of Columbia and the Outlying areas of the United States, and Associated Areas
(FIPS 5-2): Washington, D.C., National Institute of Standards and Technology.
U.S.
Department of Commerce, 1990, Counties and Equivalent Entities of the United States, Its
Possessions, and Associated Areas (FIPS 6-4): Washington, D.C., National Institute of
Standards and Technology.
- Direct_Spatial_Reference_Method: Vector
- Point_and_Vector_Object_Information:
- SDTS_Terms_Description:
- SDTS_Point_and_Vector_Object_Type: Area point
- Point_and_Vector_Object_Count: 6136
- SDTS_Terms_Description:
- SDTS_Point_and_Vector_Object_Type:
- GT-polygon composed of chains
- Point_and_Vector_Object_Count: 6136
- Spatial_Reference_Information:
- Horizontal_Coordinate_System_Definition:
- Geographic:
- Latitude_Resolution: 0.000278
- Longitude_Resolution: 0.000278
- Geographic_Coordinate_Units: Decimal Degrees
- Geodetic_Model:
- Horizontal_Datum_Name: North American Datum 1983
- Ellipsoid_Name: GRS1980
- Semi-major_Axis: 6378137
- Denominator_of_Flattening_Ratio: 298.257222
- Entity_and_Attribute_Information:
- Detailed_Description:
- Entity_Type:
- Entity_Type_Label:
- Counties (described by COUNTYP020.PAT or Countyp020.dbf)
- Entity_Type_Definition:
- Second order division of a nation such as a parish, borough, municipio, judicial
division, and independent cities in Maryland, Missouri, Nevada, and Virginia.
- Entity_Type_Definition_Source: U.S. Geological Survey
- Attribute:
- Attribute_Label: Shape
- Attribute_Definition:
- The representation of the entity in the data
- Attribute_Definition_Source: U.S. Geological Survey
- Attribute_Domain_Values:
- Enumerated_Domain:
- Enumerated_Domain_Value: Polygon
- Enumerated_Domain_Value_Definition:
- 2-dimensional element
- Enumerated_Domain_Value_Definition_Source:
- ESRI GIS software
- Attribute:
- Attribute_Label: Area
- Attribute_Definition:
- The size of the shape in coverage units
- Attribute_Definition_Source: U.S. Geological Survey
- Attribute_Domain_Values:
- Range_Domain:
- Range_Domain_Minimum: 0.000
- Range_Domain_Maximum: 73.832
- Attribute:
- Attribute_Label: Perimeter
- Attribute_Definition:
- The perimeter of the shape in coverage units
- Attribute_Definition_Source: U.S. Geological Survey
- Attribute_Domain_Values:
- Range_Domain:
- Range_Domain_Minimum: 0.010
- Range_Domain_Maximum: 87.571
- Attribute:
- Attribute_Label: COUNTYP020# or Countyp020
- Attribute_Definition: Internal feature number
- Attribute_Definition_Source: U.S. Geological Survey
- Attribute_Domain_Values:
- Range_Domain:
- Range_Domain_Minimum: 2
- Range_Domain_Maximum: 6137
- Attribute:
- Attribute_Label: COUNTYP020-ID or Countyp020
- Attribute_Definition: User-assigned feature number
- Attribute_Definition_Source: U.S. Geological Survey
- Attribute_Domain_Values:
- Range_Domain:
- Range_Domain_Minimum: 1
- Range_Domain_Maximum: 6136
- Attribute:
- Attribute_Label: State
- Attribute_Definition: The name of the State in which the county is located.
- Attribute_Definition_Source: U.S. Geological Survey
- Attribute_Domain_Values:
- Codeset_Domain:
- Codeset_Name:
- Codes for the Identification of the States, the District of Columbia and the Outlying
Areas of the United States, and Associated Areas, FIPS 5-2.
- Codeset_Source:
- U.S. Department of Commerce, National Institute of Standards and Technology
- Attribute:
- Attribute_Label: County
- Attribute_Definition:
- The name of the County or County equivalent.
- Attribute_Definition_Source: U.S. Geological Survey
- Attribute_Domain_Values:
- Codeset_Domain:
- Codeset_Name:
- Counties and Equivalent Entities of the United States, Its Possessions, and Associated
Areas, FIPS 6-4, 1990.
- Codeset_Source:
- U.S. Department of Commerce, National Institute of Standards and Technology
- Attribute:
- Attribute_Label: Fips
- Attribute_Definition:
- The 5-digit FIPS code of the County or County equivalent.
- Attribute_Definition_Source: U.S. Geological Survey
- Attribute_Domain_Values:
- Codeset_Domain:
- Codeset_Name:
- Counties and Equivalent Entities of the United States, Its Possessions, and Associated
Areas, FIPS 6-4, 1990.
- Codeset_Source:
- U.S. Department of Commerce, National Institute of Standards and Technology
- Distribution_Information:
- Distributor:
- Contact_Information:
- Contact_Organization_Primary:
- Contact_Organization:
- Earth Science Information Center, U.S. Geological Survey
- Contact_Address:
- Address_Type: mailing address
- Address: 507 National Center
- City: Reston
- State_or_Province: VA
- Postal_Code: 20192
- Contact_Voice_Telephone: 1-888-ASK-USGS (1-888-275-8747)
- Hours_of_Service: 0800-1600
- Contact_Instructions:
- In addition to the address above there are other ESIC offices throughout the country. A
full list of these offices is at <http://mapping.usgs.gov/esic/esic_index.html>
- Distribution_Liability:
- Although these data have been processed successfully on a computer system at the U.S.
Geological Survey, no warranty expressed or implied is made by the U.S. Geological Survey
regarding the utility of the data on any other system, nor shall the act of distribution
constitute any such warranty. No responsibility is assumed by the U.S. Geological Survey
in the use of these data.
- Metadata_Reference_Information:
- Metadata_Date: 19990326
- Metadata_Contact:
- Contact_Information:
- Contact_Person_Primary:
- Contact_Person: Gita Urban-Mathieux
- Contact_Organization: U.S. Geological Survey
- Contact_Address:
- Address_Type: mailing address
- Address: 521 National Center
- City: Reston
- State_or_Province: VA
- Postal_Code: 20192
- Contact_Voice_Telephone: 703-648-5175
- Contact_Electronic_Mail_Address: burbanma@usgs.gov
- Metadata_Standard_Name:
- FGDC Content Standards for Digital Geospatial Metadata
- Metadata_Standard_Version: FGDC-STD-001-1998
- Metadata_Security_Information:
- Metadata_Security_Classification_System: None
- Metadata_Security_Classification: Unclassified
- Metadata_Security_Handling_Description: None
|
Sponsored by:
For information
regarding
advertising rates
Click Here!
|
