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)
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      PMETHOD: 5
      QUADDATE: 20060401
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      PMETHOD: 5
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      PMETHOD: 5
      QUADDATE: 20060201
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      PMETHOD: 5
      QUADDATE: 20060401
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      QUADDATE: 20060201
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      PMETHOD: 5
      QUADDATE: 20060401
      QUADNAME: marathon_gap_TX
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      PMETHOD: 5
      QUADDATE: 20060401
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      LRLON: -102.875
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      ZMEAN: 1212.96
      ZSIGMA: 60.9108
      PMETHOD: 5
      QUADDATE: 20060401
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      ZMAX: 1166.51
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      PMETHOD: 5
      QUADDATE: 20060401
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      PMETHOD: 5
      QUADDATE: 20060401
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      PMETHOD: 5
      QUADDATE: 20060401
      QUADNAME: fort_stockton_east_TX
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      ULLAT: 31
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      LRLAT: 30.875
      LRLON: -102.75
      HDATUM: 83
      ZMIN: 824.584
      ZMAX: 977.914
      ZMEAN: 884.974
      ZSIGMA: 28.1282
      PMETHOD: 5
      QUADDATE: 20060401
      QUADNAME: busher_canyon_TX
      RESOLUTION: 10
      ULLAT: 30.5
      ULLON: -102.625
      LRLAT: 30.375
      LRLON: -102.5
      HDATUM: 83
      ZMIN: 986.429
      ZMAX: 1229.5
      ZMEAN: 1091.09
      ZSIGMA: 50.4648
      PMETHOD: 5
      QUADDATE: 20060401
      QUADNAME: sanderson_TX
      RESOLUTION: 10
      ULLAT: 30.25
      ULLON: -102.5
      LRLAT: 30.125
      LRLON: -102.375
      HDATUM: 83
      ZMIN: 827.993
      ZMAX: 1100.2
      ZMEAN: 966.261
      ZSIGMA: 55.8248
      PMETHOD: 5
      QUADDATE: 20060201
      QUADNAME: rock_house_draw_nw_TX
      RESOLUTION: 10
      ULLAT: 30.75
      ULLON: -102.75
      LRLAT: 30.625
      LRLON: -102.625
      HDATUM: 83
      ZMIN: 909.29
      ZMAX: 1119.98
      ZMEAN: 1022.69
      ZSIGMA: 43.7488
      PMETHOD: 5
      QUADDATE: 20060401
      QUADNAME: saddle_butte_TX
      RESOLUTION: 10
      ULLAT: 31
      ULLON: -102.625
      LRLAT: 30.875
      LRLON: -102.5
      HDATUM: 83
      ZMIN: 758.95
      ZMAX: 961.92
      ZMEAN: 857.05
      ZSIGMA: 53.4922
      PMETHOD: 5
      QUADDATE: 20060401
      QUADNAME: allen_ranch_TX
      RESOLUTION: 10
      ULLAT: 30.375
      ULLON: -102.25
      LRLAT: 30.25
      LRLON: -102.125
      HDATUM: 83
      ZMIN: 752.28
      ZMAX: 905.73
      ZMEAN: 821.269
      ZSIGMA: 28.8272
      PMETHOD: 5
      QUADDATE: 20060201
      QUADNAME: indian_mesa_TX
      RESOLUTION: 10
      ULLAT: 31
      ULLON: -102.25
      LRLAT: 30.875
      LRLON: -102.125
      HDATUM: 83
      ZMIN: 680.643
      ZMAX: 948.133
      ZMEAN: 809.165
      ZSIGMA: 79.5498
      PMETHOD: 5
      QUADDATE: 20060401
      QUADNAME: smoky_mountain_ranch_TX
      RESOLUTION: 10
      ULLAT: 30.75
      ULLON: -102.125
      LRLAT: 30.625
      LRLON: -102
      HDATUM: 83
      ZMIN: 743.606
      ZMAX: 918.676
      ZMEAN: 833.102
      ZSIGMA: 34.4041
      PMETHOD: 5
      QUADDATE: 20060201
      QUADNAME: sheffield_nw_TX
      RESOLUTION: 10
      ULLAT: 30.75
      ULLON: -102
      LRLAT: 30.625
      LRLON: -101.875
      HDATUM: 83
      ZMIN: 660.455
      ZMAX: 854.855
      ZMEAN: 789.108
      ZSIGMA: 40.8073
      PMETHOD: 5
      QUADDATE: 20060201
      QUADNAME: divide_country_TX
      RESOLUTION: 10
      ULLAT: 30.875
      ULLON: -102
      LRLAT: 30.75
      LRLON: -101.875
      HDATUM: 83
      ZMIN: 660.359
      ZMAX: 900.879
      ZMEAN: 792.189
      ZSIGMA: 64.5041
      PMETHOD: 5
      QUADDATE: 20060201
      QUADNAME: reininger_draw_TX
      RESOLUTION: 10
      ULLAT: 30.5
      ULLON: -102.875
      LRLAT: 30.375
      LRLON: -102.75
      HDATUM: 83
      ZMIN: 1167.53
      ZMAX: 1485.23
      ZMEAN: 1282.39
      ZSIGMA: 48.4765
      PMETHOD: 5
      QUADDATE: 20060401
      QUADNAME: fivemile_mesa_TX
      RESOLUTION: 10
      ULLAT: 30.875
      ULLON: -102.875
      LRLAT: 30.75
      LRLON: -102.75
      HDATUM: 83
      ZMIN: 890.232
      ZMAX: 1043.38
      ZMEAN: 950.587
      ZSIGMA: 25.756
      PMETHOD: 5
      QUADDATE: 20060401
      QUADNAME: big_canyon_ranch_nw_TX
      RESOLUTION: 10
      ULLAT: 30.5
      ULLON: -102.5
      LRLAT: 30.375
      LRLON: -102.375
      HDATUM: 83
      ZMIN: 901.693
      ZMAX: 1106.2
      ZMEAN: 1001.6
      ZSIGMA: 43.0986
      PMETHOD: 5
      QUADDATE: 20060201
      QUADNAME: east_mesa_sw_TX
      RESOLUTION: 10
      ULLAT: 30.875
      ULLON: -102.75
      LRLAT: 30.75
      LRLON: -102.625
      HDATUM: 83
      ZMIN: 861.746
      ZMAX: 967.926
      ZMEAN: 912.775
      ZSIGMA: 20.9057
      PMETHOD: 5
      QUADDATE: 20060401
      QUADNAME: hackberry_draw_se_TX
      RESOLUTION: 10
      ULLAT: 30.625
      ULLON: -102.375
      LRLAT: 30.5
      LRLON: -102.25
      HDATUM: 83
      ZMIN: 819.088
      ZMAX: 983.118
      ZMEAN: 894.033
      ZSIGMA: 33.6609
      PMETHOD: 5
      QUADDATE: 20060201
      QUADNAME: continental_ranch_TX
      RESOLUTION: 10
      ULLAT: 30.375
      ULLON: -102.125
      LRLAT: 30.25
      LRLON: -102
      HDATUM: 83
      ZMIN: 648.054
      ZMAX: 831.844
      ZMEAN: 752.411
      ZSIGMA: 34.3704
      PMETHOD: 5
      QUADDATE: 20060201
      QUADNAME: seventeen_ranch_TX
      RESOLUTION: 10
      ULLAT: 30.625
      ULLON: -102.25
      LRLAT: 30.5
      LRLON: -102.125
      HDATUM: 83
      ZMIN: 761.697
      ZMAX: 913.327
      ZMEAN: 834.644
      ZSIGMA: 31.1268
      PMETHOD: 5
      QUADDATE: 20060201
      QUADNAME: sherbino_ranch_TX
      RESOLUTION: 10
      ULLAT: 30.875
      ULLON: -102.25
      LRLAT: 30.75
      LRLON: -102.125
      HDATUM: 83
      ZMIN: 804.607
      ZMAX: 971.537
      ZMEAN: 891.666
      ZSIGMA: 37.2689
      PMETHOD: 5
      QUADDATE: 20060201
      QUADNAME: horsehead_canyon_TX
      RESOLUTION: 10
      ULLAT: 30.625
      ULLON: -102
      LRLAT: 30.5
      LRLON: -101.875
      HDATUM: 83
      ZMIN: 642.679
      ZMAX: 831.679
      ZMEAN: 751.73
      ZSIGMA: 46.4012
      PMETHOD: 5
      QUADDATE: 20060201
      QUADNAME: iraan_TX
      RESOLUTION: 10
      ULLAT: 31
      ULLON: -102
      LRLAT: 30.875
      LRLON: -101.875
      HDATUM: 83
      ZMIN: 650.841
      ZMAX: 918.391
      ZMEAN: 725.394
      ZSIGMA: 57.2803
      PMETHOD: 5
      QUADDATE: 20060401
  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:-103.0
      East_Bounding_Coordinate:-102.0
      North_Bounding_Coordinate:31.0
      South_Bounding_Coordinate:30.0
  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: RasterDistribution_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