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1:1,000,000-Scale State Boundaries of the United States, 2012
- Identification Information
- Spatial Reference Information
- Data Quality Information
- Distribution Information
- Content Information
- Spatial Representation Information
- Metadata Reference Information
Identification Information
- Citation
- Title
- 1:1,000,000-Scale State Boundaries of the United States, 2012
- Originator
- National Atlas of the United States
- Publisher
- National Atlas of the United States
- Publication Date
- 2014-03-01
- Identifier
- http://purl.stanford.edu/jv962kc4000
- Geospatial Data Presentation Form
- mapDigital
- Collection Title
- National Atlas of the United States of America, 1997-2014
- Abstract
- This polygon shapefile portrays the state boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by extracting county polygon features from the CENSUS 2006 TIGER/Line files produced by the U.S. Census Bureau. These files were then merged into a single file and county boundaries within States were removed. This layer is part of the 1997-2014 edition of the National Atlas of the United States.
- 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 1:1,000,000-scale data. No responsibility is assumed by the National Atlas of the United States in the use of these data.
- Scale Denominator
- 1000000
- Temporal Extent
- Currentness Reference
- Publication date
- Time Instant
- 2012-07-01T00:00:00
- Bounding Box
- West
- -179.14734
- East
- 179.77848
- North
- 71.38921
- South
- 17.674396
- ISO Topic Category
- boundaries
- Place Keyword
- United States
- Alaska
- Alabama
- Arizona
- Arkansas
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York (State)
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington (D.C.)
- Washington (State)
- West Virginia
- Wisconsin
- Wyoming
- Puerto Rico
-
United States. Virgin Islands
- Place Keyword Thesaurus
- geonames
- Theme Keyword
- Administrative and political divisions
-
States
- Theme Keyword Thesaurus
- lcsh
- Resource Constraints
- Use Limitation
- None. Acknowledgment of The National Atlas of the United States of America would be appreciated in products derived from these data.
- Legal Constraints
- Use Limitation
- 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.
- Status
- completed
- Maintenance and Update Frequency
- irregular
- Collection
- Collection Title
- National Atlas of the United States of America, 1997-2014
- URL
- http://purl.stanford.edu/cv275yx9215
- Language
- eng
- Credit
- National Atlas of the United States. (2012). 1:1,000,000-Scale State Boundaries of the United States, 2012. National Atlas of the United States. Available at: http://purl.stanford.edu/jv962kc4000
- Point of Contact
- Contact
- National Atlas of the United States
- Delivery Point
- 12201 Sunrise Valley Drive
- City
- Reston
- Administrative Area
- VA
- Postal Code
- 20192
- atlasmail@usgs.gov
- Phone
- 1-888-ASK-USGS (1-888-275-8747)
Spatial Reference Information
- Reference System Identifier
- Code
- 4269
- Code Space
- EPSG
- Version
- 8.6.2
Data Quality Information
- Lineage
- Process Step
- Description
- The 1:1,000,000-scale county and State boundaries were derived from U.S. Census TIGER (Topologically Integrated Geographic Encoding and Reference system) data. The TIGER files were merged and generalized. County boundaries within States were removed using the ESRI dissolve tool.
- Process Date
- 2007-01-01T00:00:00
- Process Step
- Description
- All the 1:1,000,000-scale map layers were checked for vertical integration. Line positions were adjusted as necessary to remove overlaps. Wherever possible, linear features were separated by 300 meters, but were kept within 500 meters of their true location.
- Process Date
- 2012-01-01T00:00:00
- Process Step
- Description
- The areas in the file were combined into large polygons, one for each State including associated islands, and for States that border the Great Lakes, one for the water area of each State. Population values were added from the 2010 Census information. The data were projected by region to the National Atlas Albers Equal Area Conic projection, fields were added for the perimeter measurement and square miles, the values were calculated using ArcMap, and the data were converted back to geographic coordinates. The Albers Equal Area Conic parameters used are available on request.
- Process Date
- 2013-01-01T00:00:00
- Process Step
- Description
- The map layer was saved in shapefile and in file geodatabase formats.
- Process Date
- 2013-01-01T00:00:00
- Process Step
- Description
- Data along the Canadian border were adjusted so that the Canadian and U.S. 1:1,000,000-scale data sets can be used together as seamlessly as possible. Problem areas were identified by Natural Resources Canada (NRCan) and edits to the U.S. data were performed by the USGS. To identify problems, the National Atlas 1M States 2012 data set was projected to the NRCan working coordinate system, which is a Lambert Conformal Conic projection with standard parallels of 49 and 77 degrees, datum of NAD83, an XY tolerance of 0.001 meters, and an XY resolution of 0.0001 meters. The Canadian and U.S. data sets were displayed together and features were compared across the border. An initial set of comments and suggestions for edits were sent to the USGS by NRCan. NRCan used satellite imagery for reference during the editing process by converting the appropriate National Atlas 1:1,000,000-scale map layers and the 250K Canadian topographic data to KML and loading the KMLs into GoogleEarth. Using the cursor coordinates in the ArcMap status bar, NRCan visually navigated and correlated the ArcMap and GoogleEarth vectors. NRCan exported their findings and sent them to the USGS for correction and (or) further comment. USGS reviewed the Canadian findings and returned the data to NRCan with comments. The U.S. data were either edited, not edited and further explanation was requested, or not edited and changes were suggested for the Canadian data. This process was repeated until both NRCan and USGS felt that the data were satisfactorily harmonized.
- Process Date
- 2013-01-01T00:00:00
- Source
- Title
- Legal Boundary Points
- Originator
- Government of Canada, Natural Resources Canada, Geomatics Canada, Surveyor General's Branch, International Boundary Commission
- Description
- Spatial data
- Source
- Title
- Atlas of Canada National Scale Data 1:1,000,000 - Boundary Lines
- Publication Date
- 2013-11-08
- Originator
- Government of Canada, Natural Resources Canada, Mapping Information Branch
- Publisher
- Government of Canada
- Description
- Spatial information
- Source
- Title
- 1:1,000,000-Scale National Atlas map layers and other quality control files
- Originator
- National Atlas of the United States
- Description
- Spatial information
- Source
- Title
- American Factfinder, Total Population, Table DEC_10_SF1_P1
- Publication Date
- 2012-01-01
- Originator
- United States Census Bureau
- Publisher
- United States Census Bureau
- Description
- Attribute information
- Source
- Title
- National Topographic System Maps (1:250 000)
- Originator
- Government of Canada, Natural Resources Canada, Mapping Information Branch
- Publisher
- Government of Canada
- Description
- Positional reference
- Source
- Title
- 2006 Second Edition TIGER/Line files - Boundaries
- Publication Date
- 2007-01-01
- Originator
- U.S. Census Bureau
- Description
- Spatial and attribute information
- Source
- Title
- 1:1,000,000-Scale State Boundaries of the United States
- Publication Date
- 2012-07-01
- Originator
- National Atlas of the United States
- Publisher
- National Atlas of the United States
- Description
- Spatial and attribute information
- Source
- Title
- U.S. Census Bureau Releases 2010 Census Population Counts for the U.S. Virgin Islands
- Publication Date
- 2011-08-24
- Originator
- United States Census Bureau
- Publisher
- United States Census Bureau
- Description
- Attribute information
Distribution Information
- Format Name
- Shapefile
- Distributor
- Stanford Geospatial Center
- Online Access
- http://purl.stanford.edu/jv962kc4000
- Protocol
- http
- Name
- statep010.shp
- Function
- download
Content Information
- Feature Catalog Description
- Compliance Code
- false
- Language
- eng
- Included With Dataset
- true
- Feature Catalog Citation
- Title
- Feature catalog for 1:1,000,000-Scale State Boundaries of the United States, 2012
- Feature Catalog Identifier
- 4ab72b91-9ca1-4d5c-835f-ca48c4c746d3
Spatial Representation Information
- Vector
- Topology Level
- geometryOnly
- Vector Object Type
- composite
- Vector Object Count
- 62
Metadata Reference Information
- Hierarchy Level
- dataset
- Metadata File Identifier
- edu.stanford.purl:jv962kc4000
- Parent Identifier
- http://purl.stanford.edu/cv275yx9215.mods
- Dataset URI
- http://purl.stanford.edu/jv962kc4000
- Metadata Date Stamp
- 2015-11-06
- Metadata Standard Name
- ISO 19139 Geographic Information - Metadata - Implementation Specification
- Metadata Standard Version
- 2007
- Character Set
- utf8