USGS NED n31w097 1 arc-second 2013 1 x 1 degree IMG

Metadata:

• Identification_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U.S. Geological Survey

Publication_Date: 2013

Title: USGS NED n31w097 1 arc-second 2013 1 x 1 degree IMG

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>

Description:

Abstract:

This is a tile of the National Elevation Dataset (NED) is 1 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 1 arc-second resolution, Image 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.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19990201

Ending_Date: 20131101

Currentness_Reference: publication date

Status:

Progress: In work

Maintenance_and_Update_Frequency: As Needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -97.00166666667

East_Bounding_Coordinate: -95.99833333334

North_Bounding_Coordinate: 31.00166666666

South_Bounding_Coordinate: 29.99833333333

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: 1-degree DEM

Theme_Keyword: 1 arc-second DEM

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

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:

<ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/NED/1/IMG/imgn31w097_1_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: 3612

Column_Count: 3612

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.00001

Longitude_Resolution: 0.00001

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: 0.001

Altitude_Distance_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_of_Service: 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: 40.209800

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

<ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/NED/1/IMG/n31w097.zip>

Fees: NONE

Metadata_Reference_Information:

Metadata_Date: 2013

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical address

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_of_Service: 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