Keywords
Theme:
state, polygon, line, boundary
Place:
United States of America, USA, United States, US
Stratum:
ground
Temporal:
2000, 2006, 2008
Description
Abstract
The State Boundary with Detailed Shorelines database was created using TIGER/LINE 2000 shapefile data gathered from ESRI's Geography Network. The individual county shapefiles were processed into Arc/Info coverages and then appended together to create complete state coverages. RITA/BTS Hydrographic data was integrated to create detailed shorelines.
Purpose
The United States State Boundaries database is a geographic database of state political boundaries. The database includes boundaries for all 50 states plus Puerto Rico and Washington D.C.
Supplementary Information
The RITA/BTS State Boundary Database contains TIGER 2000 geometry and attributes. To find out more about TIGER/Line files and other Census TIGER data base derived data sets visit http://www.census.gov/geo/www/tiger.
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Status of the data
Complete
Data update frequency:
None planned
Time period for which the data is relevant
Date and time:
2000
Description:
publication date
Publication Information
Who created the data: U.S. Bureau of the Census (BOC), Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
Date and time:
2000
Publisher and place:
U.S. Census Bureau (BOC), Suitland, MD
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Data storage and access information
File name: state
Type of data: vector digital data
Location of the data:
http://www.census.gov
http://www.bts.gov/programs/geographic_information_services/
Data processing environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
Accessing the data
Data format: ESRI Shapefile
Size of the data: 44.538 MB
Data transfer size: 43.235 MB
How to decompress the file: No compression applied. However, if using digital transfer online option, note access instructions.
Access instructions: NTAD is available for download at www.bts.gov/programs/geographic_information_services. The NTAD DVD can also be ordered from the online bookstore at www.bts.gov.
Available media: DVD
Constraints on accessing and using the data
Access constraints:
None
Use constraints:
Acknowledgement of the Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS) National Transportation Atlas Database (NTAD) 2008 would be appreciated in products derived from these data.
Details about this document
Contents last updated: 20080519
at time 09313600
Who completed this document
Geospatial Information Program
Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
mailing and physical address:
202-366-3282 (voice)
answers@bts.gov
Standards used to create this document
Standard name: FGDC Content Standards for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
Time convention used in this document: local time
Metadata profiles defining additonal information
ESRI Metadata Profile: http://www.esri.com/metadata/esriprof80.html
Horizontal coordinate system
Geographic coordinate system name: GCS_WGS_1984
Details
Geographic Coordinate System
Latitude Resolution: 0.000001
Longitude Resolution: 0.000001
Geographic Coordinate Units: Decimal degrees
Geodetic Model
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
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Bounding coordinates
Horizontal
In decimal degrees
West:
-179.168566
East:
179.748709
North:
71.389610
South:
17.881241
In projected or local coordinates
Left: -179.168566
Right: 179.748709
Top: 71.389610
Bottom: 17.881241
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Lineage
FGDC lineage
Process step 1
Process description: 1) Downloaded zipped shapefiles from www.geographynetwork.com; 2) Converted the Shapefiles to Coverages; 3) Integrated Hydrographic Features into State Borders to create detailed shorelines.
Source used: TIGER
Process date: June 2000
at time 3 Months
Process step 2
Process description: When UTN processed the TIGER dataset for State, County and Hydrographic (line and polygons) it created a 3-mile buffer around Texas shorelines. This buffer removed the island off the coast of Texas. To correct this error, BTS used ARC/INFO to remove the 3-mile buffer to capture the islands along Texas. To capture the islands the state dataset needed to be reselected, by selecting the code = 1. This process created a few inaccurate polygons and they were removed. To create the final datasets, the datasets were dissolved and regions created on STFIPS and County FIPS.
Process date: March 2003
Sources
Source 1:
Nationwide State Boundary Database with Detailed Shorelines
(state)
Media: CD-ROM
Scale denominator: 100,000
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Spatial data quality
Horizontal positional accuracy
Consistent with TIGER 2000
Estimated accuracy: unknown
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Spatial data description
Vector data information
ESRI description
state
ESRI feature type: Simple
Geometry type: Polygon
Topology: FALSE
Feature count: 52
Spatial Index: TRUE
Linear referencing: FALSE
SDTS description
Feature class: SDTS feature type, feature count
state:
G-polygon, 52