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