USGS 30 Meter Resolution, One-Sixtieth Degree National Elevation Dataset for CONUS, Alaska, Hawaii, Puerto Rico, and the U. S. Virgin Islands

• Identification Information
• Spatial Data Organization Information
• Spatial Reference Information
• Distribution Information
• Metadata Reference Information
• Text Version

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey (USGS), EROS Data Center

Publication_Date: 1999

Title:

USGS 30 Meter Resolution, One-Sixtieth Degree National Elevation Dataset for CONUS, Alaska, Hawaii, Puerto Rico, and the U. S. Virgin Islands

Edition: 1

Geospatial_Data_Presentation_Form: raster digital data

Publication_Information:

Publication_Place: Sioux Falls, SD

Publisher: U.S. Geological Survey

Online_Linkage: http://gisdata.usgs.net/ned/ Exit

Description:

Abstract:

The U.S. Geological Survey has developed a National Elevation Dataset (NED). The NED is a seamless mosaic of best-available elevation data. The 7.5-minute elevation data for the conterminous United States are the primary initial source data. In addition to the availability of complete 7.5-minute data, efficient processing methods were developed to filter production artifacts in the existing data, convert to the NAD83 datum, edge-match, and fill slivers of missing data at quadrangle seams. One of the effects of the NED processing steps is a much-improved base of elevation data for calculating slope and hydrologic derivatives. The specifications for the NED 1 arc second and 1/3 arc second data are geographic coordinate system Horizontal datum of NAD83, except for AK which is NAD27 Vertical datum of NAVD88, except for AK which is NAVD29.

The horizontal units (elevation) are in CENTIMETERS.

The USEPA used a "clipgrid" program to clip the GRID from each 8 digit HUC code boundary with a one mile buffer for the United States and it's territories.

Purpose:

Geospatial elevation data are utilized by the scientific and resource management communities for global change research, hydrologic modeling, resource monitoring, mapping, and visualization applications.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19990201

Ending_Date: Unknown

Currentness_Reference: publication date

Status:

Progress: In work

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -170.0000

East_Bounding_Coordinate: -65.0000

North_Bounding_Coordinate: 70.0000

South_Bounding_Coordinate: 17.0000

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD Parameter Keywords

Theme_Keyword: EARTH SCIENCE

Theme_Keyword: LAND SURFACE

Theme_Keyword: TOPOGRAPHY

Theme_Keyword: LANDFORMS

Theme_Keyword: TERRAIN ELEVATION

Theme_Keyword: 1-DEGREE DEM

Theme_Keyword: 2-ARC-SECOND DEM

Theme_Keyword: 7.5-MINUTE DEM

Theme_Keyword: CARTOGRAPHY

Theme_Keyword: DEM

Theme_Keyword: DIGITAL ELEVATION MODEL

Theme_Keyword: DIGITAL MAPPING

Theme_Keyword: EDC

Theme_Keyword: EROS

Theme_Keyword: GEODATA

Theme_Keyword: GIS

Theme_Keyword: MAPPING

Theme_Keyword: RASTER

Theme_Keyword: USGS

Place:

Place_Keyword_Thesaurus: GCMD Location Keywords

Place_Keyword: NORTH AMERICA

Place_Keyword: UNITED STATES

Place_Keyword: UNITED STATES OF AMERICA

Place_Keyword: Conterminous United States of America

Place_Keyword: Puerto Rico PR

Place_Keyword: U.S. Virgin Islands VI

Place_Keyword: Alabama AL

Place_Keyword: Alaska AK

Place_Keyword: Arizona AZ

Place_Keyword: Arkansas AR

Place_Keyword: California CA

Place_Keyword: Colorado CO

Place_Keyword: Connecticut CT

Place_Keyword: Delaware DE

Place_Keyword: District of Columbia DC

Place_Keyword: Florida FL

Place_Keyword: Georgia GA

Place_Keyword: Hawaii HI

Place_Keyword: Idaho ID

Place_Keyword: Illinois IL

Place_Keyword: Indiana IN

Place_Keyword: Iowa IA

Place_Keyword: Kansas KS

Place_Keyword: Kentucky KY

Place_Keyword: Louisiana LA

Place_Keyword: Maine ME

Place_Keyword: Maryland MD

Place_Keyword: Massachusetts MA

Place_Keyword: Michigan MI

Place_Keyword: Minnesota MN

Place_Keyword: Mississippi MS

Place_Keyword: Missouri MO

Place_Keyword: Montana MT

Place_Keyword: Nebraska NE

Place_Keyword: Nevada NV

Place_Keyword: New Hampshire NH

Place_Keyword: New Jersey NJ

Place_Keyword: New Mexico NM

Place_Keyword: New York NY

Place_Keyword: North Carolina NC

Place_Keyword: North Dakota ND

Place_Keyword: Ohio OH

Place_Keyword: Oklahoma OK

Place_Keyword: Oregon OR

Place_Keyword: Pennsylvania PA

Place_Keyword: Rhode Island RI

Place_Keyword: South Carolina SC

Place_Keyword: South Dakota SD

Place_Keyword: Tennessee TN

Place_Keyword: Texas TX

Place_Keyword: Utah UT

Place_Keyword: Vermont VT

Place_Keyword: Virginia VA

Place_Keyword: Washington WA

Place_Keyword: West Virginia WV

Place_Keyword: Wisconsin WI

Place_Keyword: Wyoming WY

Access_Constraints: None

Use_Constraints:

None. Acknowledgement of the originating agencies would be appreciated in products derived from these data.

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Spatial_Data_Organization_Information:

 

Direct_Spatial_Reference_Method: Raster

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Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.0001

Longitude_Resolution: 0.0001

Geographic_Coordinate_Units: Decimal Degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6,378,137

Denominator_of_Flattening_Ratio: 298.257

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name:

National Geodetic Vertical Datum of 1988 except for Alaska National Geodetic Vertical Datum of 1929

Altitude_Resolution: 1

Altitude_Distance_Units: CENTIMETERS

Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

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Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: USEPA Office of Water/OST Basins

Contact_Address:

Address_Type: mailing address

Address: 1200 Penn. Ave., NW Mail Stop 4305T

City: Washington

State_or_Province: District of Columbia

Postal_Code: 20460

Contact_Voice_Telephone: (202) 566-0430

Contact_Facsimile_Telephone: (202) 566-0409

Contact_Electronic_Mail_Address: basins@epa.gov

Hours_of_Service: 9-3 EST

Distribution_Liability:

Although these data have been processed successfully on a computer system under contract to the U.S. Environmental Protection Agency (USEPA), no warranty expressed or implied is made by the USEPA regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. The USEPA will warrant the delivery of this product in computer-readable format.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Environmental Systems Research Institute (ESRI) ArcView GRID

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://19january2021snapshot.epa.gov/ceam/better-assessment-science-integrating-point-and-non-point-sources-basins

Offline_Option:

Offline_Media: CD-ROM

Recording_Format: ISO 9660

Fees: None

Ordering_Instructions:

When requesting data by phone or mail, please inquire about spatial data sets that work with Better Assessment Science Integrating Point and Nonpoint Sources (BASINS). The BASINS web page has instructions for downloading datasets.

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Metadata_Reference_Information:

Metadata_Date: 20070611

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Customer Services Representative

Contact_Organization: EROS Data Center

Contact_Address:

Address_Type: mailing and physical address

Address: U.S. Geological Survey EROS Data Center

City: Sioux Falls

State_or_Province: SD

Postal_Code: 57198

Country: USA

Contact_Voice_Telephone: 605-594-6151

Contact_Facsimile_Telephone: 605-594-6589

Contact_Electronic_Mail_Address: custserv@edcmail.cr.usgs.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

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