Identification_Information:
Citation:
Citation_Information:
Originator: Bureau of Transportation Statistics, (comp.)
Publication_Date: 20010000
Title: U.S. County Boundaries
Publication_Information:
Publication_Place: Washington, DC
Publisher: Bureau of Transportation Statistics
Larger_Work_Citation:
Originator: Bureauof Transportation Statistics
Publication_Date: 2001
Title: National Transportation Atlas Databases
Publication_Information:
Publication_Place: Washington, DC
Publisher: Bureau of Transportation Statistics
Description:
Abstract: The United States County Boundaries database is a
geographic database of county political boundaries
integrated with shorelines in the United States
containing information on location, identification,
and size. The database includes boundaries for all 50 states.
Purpose: The data provide users with information about the
locations, names, FIPS Codes, and size of counties
primarily for national planning applications.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19950000
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Annual
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -179.147340
East_Bounding_Coordinate: -179.778470
North_Bounding_Coordinate: 71.382690
South_Bounding_Coordinate: 17.881243
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: area
Theme_Keyword: background
Theme_Keyword: polygon
Theme_Keyword: boundary
Theme_Keyword: county
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: United States
Access_Constraints: None
Use_Constraints: Acknowledgment of the Bureau of
Transportation Statistics National Transportation
Atlas Database would be appreciated in products derived
from these data.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Transportation Statistics
Contact_Address:
Address_Type: mailing and physical address
Address: 400 Seventh St., SW
City: Washington D.C.
State_or_Province: District of Columbia
Postal_Code: 20590
Country: United States of America
Contact_Voice_Telephone: 1 202 366 DATA
Contact_Facsimile_Telephone: 1 202 366 3640
Contact_Electronic_Mail_Address: ntad@bts.gov
Data_Set_Credit: The United States County Boundaries files were compiled
from a variety of sources including the US Bureau of the
Census, National Oceanic and Atmospheric Administration
National Ocean Service, and data supplied by State Departments
of Transportation. The data sets were created and standardized
by members of the Geographic Information Systems Laboratory,
Pellissippi Research Institute, The University of Tennessee,
Knoxville.
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: Attributes for the County Boundary
database have been created using ARC/INFO, a Geographic
Information System. All area and distance values are
calculated to the nearest 50m.
Logical_Consistency_Report: All node-link and polygon topological
relationships are created and verified using computer
algorithms. Unique entity identifiers were similarly
verified by computer algorithm.
Completeness_Report: Needed
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: The positional
accuracy of each data set varies as described.
The County borders database was compiled from
TIGER/Line data with a corresponding positional
accuracy of +/- 80m for the contiguous 48 States
plus Washington DC and Hawaii. TIGER lines for
Alaska are at a scale of 1:250,000. The shorelines
for the 23 coastal states were created using
1:250,000 NOS digital data which has a positional
accuracy of +/- 200m. Thus, all internal political
boundaries have a higher accuracy than do the coastal
definitions with the exception of Alaska.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Bureau of the Census
Publication_Date: 1990
Title: TIGER/Line machine readable data files, US
Bureau of the Census
Publication_Information:
Publication_Place: Washington D.C.
Publisher: U.S. Bureau of the Census
Online_Linkage: www.census.gov
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19900000
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: TIGER
Source_Contribution: Spatial information for
political boundaries of counties and
territories.
Source_Information:
Source_Citation:
Citation_Information:
Originator: National Oceanic and Atmospheric
Administration, National Ocean Service.
Publication_Date: 19920000
Title: NOS D-Scale Digital Shoreline Files, Version 1, Feb.
1992.
Publication_Information:
Publication Place: Washington D.C.
Publisher: National Oceanic and Atmospheric
Administration
Online_Linkage: www.noaa.gov
Source_Scale_Denominator: none
Type_of_Source_Media: stable-base material
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19920000
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: NOS
Source_Contribution: Shoreline vectors.
Process_Step:
Process_Description: All state supplied maps were digitized using
ARC/INFO V6.1x. All State supplied digital data was converted
to ARC/INFO using a variety of encoding methods. The state
databases were appended and adjusted to correct minor geodetic
problems. County boundaries were added from TIGER/Line data
and topologically integrated using ARC/INFO. After attributes
were added and the data set checked for completeness and
accuracy it was extracted from ARC/INFO and reformatted into
ASCII data files.
Source_Used_Citation_Abbreviation: STATE DATA
Source_Used_Citation_Abbreviation: TIGER
Process_Date: 19940901
Source_Produced_Citation_Abbreviation: COUNTY
Process_Step:
Process_Description: All county political boundaries were extracted
from the TIGER/Line CD-ROMs and appended into a single polygon
database using ARC/INFO V6.1x. The NOS vectors were overlaid
and topologically integrated into the county polygons using
ARC/INFO. After attributes were added and the data set
checked for completeness and accuracy it was extracted from
ARC/INFO and reformatted into ASCII data files.
Source_Used_Citation_Abbreviation: TIGER
Source_Used_Citation_Abbreviation: NOS
Process_Date: 19940901
Source_Produced_Citation_Abbreviation: COUNTY
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-Polygon
composed of chains
Point_and_Vector_Object_Count: 3,217
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000464
Longitude_Resolution: 0.000464
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 1980
Semi-Major_Axis:6,378,137
Denominator_of_Flattening_Ratio: 298.25722
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: county.shp
Entity_Type_Definition: ESRI shape file of United States counties
Entity_Type_Definition_Source: BTS
Attribute:
Attribute_Label: SHAPE
Attribute_Definition:
The SHAPE attribute is a data attribute inherent to the
ESRI shapefile format. It defines the vector data
as a point, polyline, or polygon. For further
information concerning the definition of SHAPE,
consult ESRI documentation.
Attribute_Definition_Source: ESRI and BTS
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: "polygon"
Enumerated_Domain_Value_Definition: A "Polygon" is an area feature
comprised of points and line segments.
Enumerated_Domain_Value_Definition_Source: Assigned
Attribute:
Attribute_Label: Version
Attribute_Definition: Number indicateing the file version.
Attribute_Definition_Source: Assigned
Attribute_Domain_Values:
Domain: Range
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: Infinity
Attribute:
Attribute_Label: Revision
Attribute_Definition: Record revision number
Attribute_Definition_Source: Assigned
Attribute_Domain_Values:
Domain: Range
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: Infinity
Attribute:
Attribute_Label: Moddate
Attribute_Definition: Record Modification Date
Attribute_Definition_Source: Assigned
Attribute_Domain_Values:
Domain: Range
Range_Domain:
Range_Domain_Minimum: Creation Date of Dataset
Range_Domain_Maximum: End of time
Attribute:
Attribute_Label: Featurid
Attribute_Definition: Unique identifier for each geographic
entity. (It is the state FIPS code concatenated with the
county FIPS Code)
Attribute_Definition_Source: Assigned
Attribute_Domain_Values:
Domain: Codeset
Codeset_Domain:
Codeset_Name: Federal Information Processing
Standard, Publication 6-4
Codeset_Source: National Institute of Standards and Technology
Attribute:
Attribute_Label: Descript
Attribute_Definition: Name/identification of the geographic entity -
County Name
Attribute_Definition_Source: FIPS Pub 6-4
Attribute_Domain_Values:
Domain: Codeset
Codeset_Domain:
Codeset_Name: Federal Information Processing Standard,
Publication 6-4
Codeset_Source: National Institute of Standards and
Technology
Attribute:
Attribute_Label: Stfips
Attribute_Definition: State FIPS Code
Attribute_Definition_Source: FIPS Pub 6-4
Attribute_Domain_Values:
Domain: Codeset
Codeset_Domain:
Codeset_Name: Federal Information Processing Standard,
Publication 6-4
Codeset_Source: National Institute of Standards and
Technology
Attribute:
Attribute_Label: Source
Attribute_Definition: Identifies the original source of the
coordinate data
Attribute_Definition_Source: Assigned
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: S
Enumerated_Domain_Value_Definition: State supplied data
Enumerated_Domain_Value_Definition_Source: Assigned
Enumerated_Domain:
Enumerated_Domain_Value: U
Enumerated_Domain_Value_Definition: Data supplied by the
US Geological Survey
Enumerated_Domain_Value_Definition_Source: Assigned
Enumerated_Domain:
Enumerated_Domain_Value: T
Enumerated_Domain_Value_Definition: Data supplied by US
Census, Tiger/Line files
Enumerated_Domain_Value_Definition_Source: Assigned
Enumerated_Domain:
Enumerated_Domain_Value: D
Enumerated_Domain_Value_Definition: Digitized from state
supplied maps
Enumerated_Domain_Value_Definition_Source: Assigned
Enumerated_Domain:
Enumerated_Domain_Value: M
Enumerated_Domain_Value_Definition: Data supplied by US
military
Enumerated_Domain_Value_Definition_Source: Assigned
Distribution_Information:
Distributor:
Contact_information:
Contact_Organization_Primary:
Contact_Organization: BTS Product Distribution Center
Contact_Address:
Address_Type: mailing and physical address
Address: 400 Seventh Street, SW
City: Washington
State_or_Province: District of Columbia
Postal_Code: 20590
Contact_Voice_Telephone: 1 202 366 DATA
Contact_Facsimile_Telephone: 1 202 366 3640
Contact_Electronic_Mail_Address: orders@bts.gov
Resource_Description: National Transportation Atlas Databases 2001
Distribution_Liability: None
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ArcView Shape File
Format_Information_Content: No Explanation
File_Decompression_Technique: No compression applied.
However, if using digital transfer online option,
note access instructions.
Transfer_Size: 49 megabytes
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: www.bts.gov/gis/
Access_Instructions: Anyone with access to the Internet may
connect to the BTS web server. To access a specific
data set, go to the web address listed above in the
Network Resource Name. The BTS server allows visitors
to create an archive package for download in one of
three common formats:
.zip - an MS-DOS zip archive;
.tgz - a gzip-ed unix tar archive; and
.tar - a unix tar archive.
This archived package is stored in a temporary file
which can then be copied to the visitor's home directory.
Online_Computer_and_Operating_System: Sun Ultra running Solaris 2.6 operating system.
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Capacity:
Recording_Density: 650
Recording_Density_Units: megabytes
Recording_Format: ISO 9600
Fees: none
Ordering_Instructions: Call (202.366.DATA), fax
(202.366.3640), or E-mail (orders@bts.gov) BTS to
request the National Transportation Atlas Databases 2000 CD-ROM. This and other BTS products may be ordered from
the BTS Internet site (www.bts.gov).
Metadata_Reference_Information:
Metadata_Date: 19950830
Metadata_Review_Date: 20010509
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Transportation Statistics
Contact_Address:
Address_Type: mailing and physical address
Address: 400 Seventh Street, SW
City: Washington
State_or_Province: District of Columbia
Postal_Code: 20590
Contact_Voice_Telephone: 1 202 366 DATA
Contact_Facsimile_Telephone: 1 202 366 3640
Contact_Electronic_Mail_Address: orders@bts.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial
Metadata
Metadata_Standard_Version: FGDC-STD-001-1998