Elevation, National Elevation Database (USGS)
Identification_Information
Citation
Citation_InformationOriginator: U.S. Geological Survey (USGS), EROS Data Center
Publication_Date: 01-JAN-1999
Title: Elevation, National Elevation Database (USGS)
Edition: 1
Geospatial_Data_Presentation_Form: raster digital data
Description
Abstract: Data available online through the University of Arkansas Spatial Library at http://www.cast.uark.edu/UASL. The U.S. Geological Survey has developed a National Elevation Database (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. This layer was created by GeoSurf.
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
Beginning_Time: Unknown
Ending_Time: Unknown
Currentness_Reference: publication date
Status
Progress: In work
Maintenaance_and_Update_Frequency: As needed
Spatial_Domain
Bounding_Coordinates
West_Bounding_Coordinate: -94.1242567024674
East_Bounding_Coordinate: -93.92239027009053
North_Bounding_Coordinate: 36.311317915217415
South_Bounding_Coordinate: 36.201259230168105
Keywords
Theme
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: Elevation
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
Theme
Theme_Keyword_Thesaurus: CAST Physical Geography keywords
Theme_Keyword: Elevation
Theme_Keyword: Digital Elevation Model
Theme_Keyword: DEM
Theme_Keyword: Aspect
Theme_Keyword: Slope
Theme_Keyword: Hillshade
Theme_Keyword: Shaded Relief
Theme
Theme_Keyword_Thesaurus: None
Theme_Keyword: DEM
Theme_Keyword: Elevation
Theme_Keyword: Digital Elevation Model
Theme_Keyword: Contour Lines
Theme_Keyword: Digital Terrain Model
Theme_Keyword: Slope
Theme_Keyword: Aspect
Theme_Keyword: Shaded Relief
Theme_Keyword: Hillshade
Theme_Keyword: Hypsography
Theme_Keyword: Mosaic
Theme_Keyword: Altitude
Theme_Keyword: Height
Access_Constraints: None
Use_Constraints: None. Acknowledgement of the originating agencies would be appreciated in products derived from these data.
Point_of_Contact
Contact_Information
Contact_Organization_Primary
Contact_Organization: Center for Advanced Spatial Technologies
12 Ozark Hall
University of Arkansas
Fayetteville, AR 72701
(501) 575-6159
info@cast.uark.edu
Contact_Address
Address_Type: mailing and physical address
Address: 12 Ozark Hall
City: Fayetteville
State_or_Province: AR
Postal_Code: 72701
Contact_Voice_Telephone: 479-575-6159
Contact_Electronic_Mail_Address: www.cast.uark.edu
Data_Quality_Information
Attribute_Accuracy
Lineage
Source_Information
Source_Citation
Citation_InformationOriginator: U.S. Geological Survey (USGS), EROS Data Center
Publication_Date: 01-JAN-1999
Title: Elevation, National Elevation Database (USGS)
Edition: 1
Geospatial_Data_Presentation_Form: raster digital data
Source_Time_Period_of_Content:
Process_Step
Process_Description: Data was clipped and reprojected to the parameters specified in this metadata by GeoSurf.
Process_Date: Feb 21, 2008
Process_Time: 124629
Process_Contact
Contact_Information
Contact_Organization_Primary
Contact_Organization: Center for Advanced Spatial Technologies, University of Arkansas
Contact_Address
Address_Type: mailing and physical
Address: 12 Ozark Hall
City: Fayetteville
State_or_Province: AR
Postal_Code: 72701
Country: USA
Contact_Voice_Telephone: 479-575-6159
Cloud_Cover: 0
Spatial_Data_Organization_Information
Direct_Spatial_Reference_Method: Raster
Spatial_Reference_Information
Horizontal_Coordinate_System_Definition
Geographic
Latitude_Resolution: 0.000000
Longitude_Resolution: 0.000000
Geographic_Coordinate_Units: degree
Geodetic_Model
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System of 1980
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Distribution_Information
Distributor
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_Electronic_Mail_Address: custserv@edcmail.cr.usgs.gov
Resource_Description: National Elevation Database (NED)
Distribution_Liability: Although these data have been processed successfully on a computer
system at the U.S. Geological Survey, EROS Data Center, no warranty
expressed or implied is made by either regarding the utility of the
data on any system, nor shall the act of distribution constitute any
such warranty. The USGS will warrant the delivery of this product in
computer-readable format and will offer appropriate adjustment of
credit when the product is determined unreadable by correctly adjusted
computer peripherals, or when the physical medium is delivered in
damaged condition. Requests for adjustments of credit must be made
within 90 days from the date of this shipment from the ordering site.
Technical_Prerequisites:
Metadata_Reference_Information
Metadata_Date: 36202
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_Electronic_Mail_Address: custserv@edcmail.cr.usgs.gov
Metadate_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998