USGS NED 2 arc-second n68w156 1 x 1 degree IMG 2016


Identification Information:
Citation:
Citation Information:
Originator: U.S. Geological Survey
Publication Date: 20160321
Title: USGS NED 2 arc-second n68w156 1 x 1 degree IMG 2016
Geospatial Data Presentation Form: raster digital data
Publication Information:
Publication Place: Reston, VA
Publisher: U.S. Geological Survey
Online Linkage: http://ned.usgs.gov/
Online Linkage: http://nationalmap.gov/viewer.html
Larger Work Citation:
Citation Information:
Originator: U.S. Geological Survey
Publication Date: 2016
Title: National Elevation Dataset (NED) Alaska 2 arc-second
Online Linkage: https://www.sciencebase.gov/catalog/item/4f70aaece4b058caae3f8de9
Description:
Abstract: This tile of the National Elevation Dataset (NED) is 2 arc-second resolution. The National Elevation Dataset (NED) serves the elevation layer of The National Map, and provides basic elevation information for earth science studies and mapping applications in the United States. Scientists and resource managers use NED data for global change research, hydrologic modeling, resource monitoring, mapping and visualization, and many other applications. The NED is an elevation dataset that consists of seamless layers and a high resolution layer. Each of these layers are composed of the best available raster elevation data of the conterminous United States, Alaska, Hawaii, territorial islands, Mexico and Canada. The NED is updated continually as new data become available. All NED data are in the public domain. The NED are derived from diverse source data that are processed to a common coordinate system and unit of vertical measure. These data are distributed in geographic coordinates in units of decimal degrees, and in conformance with the North American Datum of 1983 (NAD 83). All elevation values are in meters and, over the continental United States, are referenced to the North American Vertical Datum of 1988 (NAVD 88). The vertical reference will vary in other areas. NED data are available nationally (except for Alaska) at resolutions of 1 arc-second (approx. 30 meters) and 1/3 arc-second (approx. 10 meters), and in limited areas at 1/9 arc-second (approx. 3 meters). In most of Alaska, only lower resolution source data are available. As a result, most NED data for Alaska are at 2-arc-second (approx. 60 meters) grid spacing. Part of Alaska is available at the 1- and 1/3-arc-second resolution from IFSAR collections starting in 2010. Plans are in place for collection of statewide IFSAR in Alaska through 2016.
Purpose: The NED serves as the elevation layer of The National Map, and provides basic elevation information for earth science studies and mapping applications in the United States. The data are utilized by the scientific and resource management communities for global change research, hydrologic modeling, resource monitoring, mapping and visualization applications.
Supplemental Information: This tile of the National Elevation Dataset (NED) is 2 arc-second resolution, IMG file format, and covers a one degree block. The geographic area of coverage is described below in the Bounding Coordinates. Additional information for the NED may be found on http://ned.usgs.gov/. Data may be downloaded through The National Map Viewer: http://nationalmap.gov/viewer.html. Direct links for direct access by automated services are provided in the Distribution section of this metadata.; {"gdaId" : 8020222}
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 2013
Ending Date: 2013
Currentness Reference: publication date
Status:
Progress: In work
Maintenance and Update Frequency: As needed
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -156.003333333766
East Bounding Coordinate: -154.996666666833
North Bounding Coordinate: 68.0033333335675
South Bounding Coordinate: 66.9966666666343
Keywords:
Theme:
Theme Keyword Thesaurus: ISO 19115 Topic Category
Theme Keyword: elevation
Theme:
Theme Keyword Thesaurus: NGDA Portfolio Themes
Theme Keyword: Elevation
Theme:
Theme Keyword Thesaurus: National Elevation Dataset (NED)
Theme Keyword: National Elevation Dataset
Theme Keyword: NED
Theme Keyword: Elevation
Theme Keyword: Grid
Theme Keyword: LIght Detection And Ranging
Theme Keyword: LIDAR
Theme Keyword: Interferometric Synthetic Aperture Radar
Theme Keyword: IFSAR
Theme Keyword: High Resolution
Theme Keyword: Topographic Surface
Theme Keyword: Topography
Theme Keyword: Bare Earth
Theme Keyword: Hydro-Flattened
Theme Keyword: Terrain Elevation
Theme Keyword: Cartography
Theme Keyword: DEM
Theme Keyword: Digital Elevation Model
Theme Keyword: Digital Mapping
Theme Keyword: Digital Terrain Model
Theme Keyword: Geodata
Theme Keyword: GIS
Theme Keyword: Mapping
Theme Keyword: Raster
Theme Keyword: USGS
Theme Keyword: U.S. Geological Survey
Theme Keyword: 1-degree DEM
Theme Keyword: 2 arc-second DEM
Theme:
Theme Keyword Thesaurus: The National Map Type Thesaurus
Theme Keyword: Downloadable Data
Theme:
Theme Keyword Thesaurus: The National Map Theme Thesaurus
Theme Keyword: Elevation
Theme:
Theme Keyword Thesaurus: The National Map Collection Thesaurus
Theme Keyword: National Elevation Dataset (NED) Alaska 2 arc-second
Theme Keyword: National Elevation Dataset (NED)
Theme:
Theme Keyword Thesaurus: The National Map Product Extent Thesaurus
Theme Keyword: 1 x 1 degree
Theme:
Theme Keyword Thesaurus: The National Map Product Format Thesaurus
Theme Keyword: IMG
Place:
Place Keyword Thesaurus: Geographic Names Information System
Place Keyword: US
Place Keyword: United States
Access Constraints: None. Any downloading and use of these data signifies a user's agreement to comprehension and compliance of the USGS Standard Disclaimer. Insure all portions of metadata are read and clearly understood before using these data in order to protect both user and USGS interests.
Use Constraints: There is no guarantee or warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since these data were collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the USGS. Please refer to http://www.usgs.gov/privacy.html for the USGS disclaimer.
Browse Graphic:
Browse Graphic File Name: https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/2/IMG/USGS_NED_2_n68w156_IMG_thumb.jpg
Browse Graphic File Description: Thumbnail JPG image
Browse Graphic File Type: JPEG
Data Set Credit: Acknowledgement of the originating agencies would be appreciated in products derived from these data.
Spatial Data Organization Information:
Direct Spatial Reference Method: Raster
Raster Object Information:
Raster Object Type: Pixel
Row Count: 1812
Column Count: 1812
Vertical Count: 1
Spatial Reference Information:
Horizontal Coordinate System Definition:
Geographic:
Latitude Resolution: 0.00055555556
Longitude Resolution: 0.00055555556
Geographic Coordinate Units: Decimal degrees
Geodetic Model:
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.2572221
Vertical Coordinate System Definition:
Altitude System Definition:
Altitude Datum Name: North American Vertical Datum of 1988
Altitude Resolution: 1.000000
Altitude Units: meters
Altitude Encoding Method: Implicit coordinate
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: U.S. Geological Survey
Contact Address:
Address Type: mailing and physical
Address: USGS National Geospatial Program Office
Address: 12201 Sunrise Valley Drive
City: Reston
State or Province: VA
Postal Code: 20192
Country: USA
Contact Voice Telephone: 1-888-ASK-USGS (1-888-275-8747)
Hours: Monday through Friday 8:00 AM to 4:00 PM Eastern Time Zone USA
Contact Instructions: Please visit http://www.usgs.gov/ask/ to contact us.
Resource Description: Downloadable Data
Distribution Liability: 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 either regarding the utility of the data on any system, nor shall the act of distribution constitute any such warranty. The USGS will warranty 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.
Standard Order Process:
Digital Form:
Digital Transfer Information:
Format Name: IMG
Transfer Size: 10.67595
Digital Transfer Option:
Online Option:
Computer Contact Information:
Network Address:
Network Resource Name: https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/2/IMG/USGS_NED_2_n68w156_IMG.zip
Fees: NONE
Metadata Reference Information:
Metadata Date: 20160425
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: U.S. Geological Survey
Contact Address:
Address Type: mailing and physical
Address: USGS National Geospatial Program Office
Address: 12201 Sunrise Valley Drive
City: Reston
State or Province: VA
Postal Code: 20192
Country: USA
Contact Voice Telephone: 1-888-ASK-USGS (1-888-275-8747)
Hours: Monday through Friday 8:00 AM to 4:00 PM Eastern Time Zone USA
Contact Instructions: Please visit http://www.usgs.gov/ask/ to contact us.
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Extensions:
Online Linkage: http://ned.usgs.gov/metadata.html
Profile Name: National Elevation Dataset (NED) Metadata