National Elevation Dataset

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey (USGS), EROS Data Center
Publication_Date: 1999
Title: 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://gisdata.usgs.net/ned/>
Description:
Abstract:
The U.S. Geological Survey has developed a National Elevation Dataset (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. The specifications for the NED 1 arc second and 1/3 arc second data are: Geographic coordinate system Horizontal datum of NAD83, except for AK which is NAD27 Vertical datum of NAVD88, except for AK which is NAVD29 Z units of meters
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.
Supplemental_Information:
(Source DEM information)
QUADNAMERESOLUTIONULLATULLONLRLATLRLONHDATUMZMINZMAXZMEANZSIGMAPMETHODQUADDATE
dixie_mountain_OR1045.74969863892-123.0009994506845.62469863892-122.87599945068278.0609998703520.56097412109247.21699523926123.15000152588520000512
sauvie_island_OR1045.74969863892-122.8759994506845.62469863892-122.75099945068270281.1149902343814.6963996887234.21450042725519990218
vancouver_WA1045.74969863892-122.7509994506845.62469863892-122.62599945068270140.0110015869138.5603981018129.75289916992519990218
orchards_WA1045.74969863892-122.6259994506845.62469863892-122.500999450682738.24499893188108.654998779376.6523971557611.53600025177519990218
lacamas_creek_WA1045.74969863892-122.5009994506845.62469863892-122.375999450682755.61289978027630.77697753906170.41200256348109.672996521519990218
larch_mountain_WA1045.74969863892-122.3759994506845.62469863892-122.250999450682729.417699813841226.98999023438442.11599731445211.01100158691519990218
bobs_mountain_WA1045.74969863892-122.2509994506845.62469863892-122.1259994506827137.91099548341337.92004394531519.67797851563221519990218
beacon_rock_WA1045.74969863892-122.1259994506845.62469863892-122.00099945068272.590019941331149.56994628906596.76599121094218.41400146484519990218
bonneville_dam_OR1045.74969863892-122.0009994506845.62469863892-121.87599945068275.593060016631134.89001464844310.32299804688246.8869934082519990218
carson_WA1045.74969863892-121.8759994506845.62469863892-121.750999450682714.436400413511432.68994140625470.11099243164403.22299194336519990416
hillsboro_OR1045.62469863892-123.0009994506845.49969863892-122.875999450682733.7560005188278.5559997558671.8081970214834.04869842529520000512
linnton_OR1045.62469863892-122.8759994506845.49969863892-122.75099945068271.25699996948389.95700073242126.4759979248185.96970367432520000512
portland_OR1045.62469863892-122.7509994506845.49969863892-122.62599945068271.35580003262383.5799865722753.5125999450775.44529724121519990218
mount_tabor_OR1045.62469863892-122.6259994506845.49969863892-122.50099945068271.67060995102197.964004516650.77190017736.18330001831519990218
camas_WA1045.62469863892-122.5009994506845.49969863892-122.37599945068271.34179997444234.2120056152363.3027992248548.07669830322519990218
washougal_WA1045.62469863892-122.3759994506845.49969863892-122.25099945068271.328799963357.64401245117109.5619964599687.82140350342519990218
bridal_veil_OR1045.62469863892-122.2509994506845.49969863892-122.12599945068270741.99798583984288.68301391602194.44400024414519990218
multnomah_falls_OR1045.62469863892-122.1259994506845.49969863892-122.00099945068275.6180601121237.63000488281581.34197998047361.41198730469519990218
tanner_butte_OR1045.62469863892-122.0009994506845.49969863892-121.87599945068275.636060237881384.26000976563801.04797363281267.10800170898519990218
wahtum_lake_OR1045.62469863892-121.8759994506845.49969863892-121.7509994506827227.576004028321495.07995605469954.44500732422239.19400024414519991102
scholls_OR1045.49969863892-123.0009994506845.37469863892-122.875999450682731.95999908447309.6600036621168.2794036865235.81729888916520000512
beaverton_OR1045.49969863892-122.8759994506845.37469863892-122.750999450682731.96699905396239.9669952392676.5137023925837.19990158081520000512
lake_oswego_OR1045.49969863892-122.7509994506845.37469863892-122.62599945068271.67100000381325.8710021972788.3335037231459.77159881592520000512
gladstone_OR1045.49969863892-122.6259994506845.37469863892-122.50099945068273.46499991417334.4649963378986.0411987304756.65209960938519991102
damascus_OR1045.49969863892-122.5009994506845.37469863892-122.375999450682723.77099990845344.17098999023141.4440002441454.99990081787519991102
sandy_OR1045.49969863892-122.3759994506845.37469863892-122.250999450682713.65400028229352.45401000977187.880996704157.14199829102519991102
bull_run_OR1045.49969863892-122.2509994506845.37469863892-122.125999450682764.94300079346808.94299316406355.0710144043130.34700012207519991102
brightwood_OR1045.49969863892-122.1259994506845.37469863892-122.0009994506827223.263000488281039.16003417969561.51501464844193.31199645996519991102
hickman_butte_OR1045.49969863892-122.0009994506845.37469863892-121.8759994506827342.295013427731367.58996582031898.30102539063163.15699768066519991102
bull_run_lake_OR1045.49969863892-121.8759994506845.37469863892-121.7509994506827571.091979980471697.79003906251010.41998291016181.99299621582519991102
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19990201
Ending_Date: Unknown
Currentness_Reference: publication date
Status:
Progress: In work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate:-122.93274905
East_Bounding_Coordinate:-121.8111488
North_Bounding_Coordinate:45.73333794
South_Bounding_Coordinate:45.42393097
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.

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster

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_Facsimile_Telephone: 605-594-6589
Contact_Electronic_Mail_Address: custserv@edcmail.cr.usgs.gov
Resource_Description: National Elevation Dataset (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_Reference_Information:
Metadata_Date: 19990211
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