Metadata:
  Identification_Information:
    Time_Period_of_Content:
      Time_Period_Information:
        Single_Date/Time:
          Calendar_Date: 1992
      Currentness_Reference: publication date of source data
  Data_Quality_Information:
    Attribute_Accuracy:
      Attribute_Accuracy_Report:
        The image given condenses the original, 16-bit data into classes
        defined below (see Attribute_Definition).  This tends to alter any
        errors in the original depth values, generally making the errors
        less visible.
    Logical_Consistency_Report:
      Please refer to documentation of the source data, ETOPO5 and TBASE.
      Because the 20-minute gridded data subsume more spatial variability
      in elevation and bathymetry, these data better represent true topography.
    Completeness_Report:
      Please refer to documentation of the source data, ETOPO5 and TBASE.
    Positional_Accuracy:
      Horizontal_Positional_Accuracy:
        Horizontal_Positional_Accuracy_Report:
          Please refer to documentation of the source data, ETOPO5 and TBASE.
          Because the 20-minute gridded data are arranged on a coarser grid than
          the original 5-minute data, and the registration error and bias in the
          original data are smoothed somewhat at this coarser scale, fidelity
          with ground conditions is improved.
  Spatial_Data_Organization_Information:
    Direct_Spatial_Reference_Method: Raster
    Raster_Object_Information:
      Raster_Object_Type: Pixel
      Row_Count: 540
      Column_Count: 1080
  Spatial_Reference_Information:
    Horizontal_Coordinate_System_Definition:
      Geographic:
        Latitude_Resolution: 20
        Longitude_Resolution: 20
        Geographic_Coordinate_Units: Decimal minutes
  Entity_and_Attribute_Information:
    Detailed_Description:
      Entity_Type:
        Entity_Type_Label: Pixel
        Entity_Type_Definition: Pixel in the image
        Entity_Type_Definition_Source: self-evident
      Attribute:
        Attribute_Label: Pixel value
        Attribute_Definition:
          Pixel values are obtained through a look-up table that relates
          the original source data, 2-byte integers representing elevation
          or bathymetry in meters above or below sea-level, to color.
          The mapping is designed to emphasize the extreme estimates of
          sea-level rise and fall since the mid-Pliocene. The mapping is
          made using the following algorithm.

          if depth < -5000 then color = 0x00 0x00 0x00
          if depth < -4000 then color = 0x00 0x00 0x1F
          if depth < -3000 then color = 0x00 0x00 0x3F
          if depth < -2000 then color = 0x00 0x00 0x5F
          if depth < -1000 then color = 0x00 0x00 0x7F
          if depth <  -120 then color = 0x00 0x00 0x9F
          if depth <     0 then color = 0x00 0x9F 0xFF
          if depth <    35 then color = 0x00 0x7F 0x00
          if depth <    60 then color = 0x00 0xBF 0x00
          if depth <   500 then color = 0x00 0xFF 0x00
          if depth <  1000 then color = 0xFF 0xFF 0x00
          if depth <  2000 then color = 0xFF 0xDF 0x00
          if depth <  3000 then color = 0xFF 0xBF 0x00
          if depth <  4000 then color = 0xFF 0x9F 0x00
          if depth <  5000 then color = 0xFF 0x7F 0x00
          if depth <  6000 then color = 0xFF 0x5F 0x00
          if depth <  7000 then color = 0xFF 0x3F 0x00
          if depth <  8000 then color = 0xFF 0x1F 0x00
          if depth < 32767 then color = 0xFF 0x00 0x00
        Attribute_Definition_Source:
          The program used to create the images is given in source code at
          <URL:http://geochange.er.usgs.gov/pub/data/sea_level/Core/raw/src/color_topo.c>
          The data describing the color mapping is given in
          <URL:http://geochange.er.usgs.gov/pub/data/sea_level/Core/raw/pliocene/images/chg.bins>
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0
            Range_Domain_Maximum: 31
        Attribute_Units_of_Measure: None; the values are indices into a color look-up table.
  Distribution_Information:
    Standard_Order_Process:
      Digital_Form:
        Digital_Transfer_Information:
          Format_Name: GIF
          Transfer_Size: 0.073
        Digital_Transfer_Option:
          Online_Option:
            Computer_Contact_Information:
              Network_Address:
                Network_Resource_Name: <URL:http://geochange.er.usgs.gov/pub/data/sea_level/Core/raw/pliocene/images/chg20e.gif>
                Network_Resource_Name: <URL:http://geochange.er.usgs.gov/pub/data/sea_level/Core/raw/pliocene/images/chg20t.gif>
      Digital_Form:
        Digital_Transfer_Information:
          Format_Name: PICT
          Transfer_Size: 0.15
        Digital_Transfer_Option:
          Online_Option:
            Computer_Contact_Information:
              Network_Address:
                Network_Resource_Name: <URL:http://geochange.er.usgs.gov/pub/data/sea_level/Core/raw/pliocene/images/chg20e.pict>
                Network_Resource_Name: <URL:http://geochange.er.usgs.gov/pub/data/sea_level/Core/raw/pliocene/images/chg20t.pict>
  Metadata_Reference_Information:
    Metadata_Lineage:
      Record_Identifier_Type: URL
      Record_Combine_Method: Replace
      Parent_Record: <URL:http://geochange.er.usgs.gov/pub/data/sea_level/Contents/FGDCmeta>