Aspect (0-360), National Elevation Dataset

Citation:

Citation Information:

Originator: U.S. Geological Survey (USGS), EROS Data Center
Publication Date: 1999
Title: Aspect (0-360), National Elevation Dataset
Edition: 1
Geospatial Data Presentation Form: raster digital data
Publication Information:

Publication Place: Sioux Falls, SD
Publisher: U.S. Geological Survey

Online Linkage: http://edcnts12.cr.usgs.gov/ned/ned.html

Description:

Abstract:
The Aspect dataset is a derived product from the USGS National Elevation Dataset. 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.

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: 2/1/1999
Beginning Time: Unknown
Ending Date: Unknown
Ending Time: Unknown

Currentness Reference: publication date

Status:

Progress: In work
Maintenance and Update Frequency: As needed

Spatial Domain:

Bounding Coordinates:

West Bounding Coordinate: 94.625
East Bounding Coordinate: 93.25
North Bounding Coordinate: 36.5
South Bounding Coordinate: 35.625

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

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

Lineage:

Source Information:

Source Citation:

Citation Information:

Originator: U.S. Geological Survey (USGS), EROS Data Center
Publication Date: 1999
Title: Elevation, National Elevation Database (USGS)
Edition: 1
Geospatial Data Presentation Form: raster digital data
Publication Information:

Publication Place: Sioux Falls, SD
Publisher: U.S. Geological Survey

Online Linkage: http://edcnts12.cr.usgs.gov/ned/ned.html

Source Time Period of Content:

Time Period Information:

Single Date/Time:

Time of Day: Unknown

Cloud Cover: 0

Direct Spatial Reference Method: Raster

Horizontal Coordinate System Definition:

Geographic:

Latitude Resolution: 0
Longitude Resolution: 0
Geographic Coordinate Units: Decimal degrees

Geodetic Model:

Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137
Denominator of Flattening Ratio: 298.257

Vertical Coordinate System Definition:

Altitude System Definition:

Altitude Distance Units: meters

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 Facsimile Telephone: 605-594-6589
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.

Metadata Date: 2/11/1999
Metadata Review Date:
Metadata Future Review Date:
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