Metadata:
  Identification_Information:
    Time_Period_of_Content:
      Time_Period_Information:
        Range_of_Dates/Times:
          Beginning_Date: cc19000
          Ending_Date: 0000
      Currentness_Reference:
        Images are available for each 1000-year interval from approximately
        21,000 years ago to the present.  Ages are not exact.
  Data_Quality_Information:
    Attribute_Accuracy:
    Logical_Consistency_Report:
    Completeness_Report:
    Positional_Accuracy:
  Spatial_Data_Organization_Information:
    Direct_Spatial_Reference_Method: Raster
    Raster_Object_Information:
      Raster_Object_Type: Pixel
      Row_Count: 180
      Column_Count: 360
  Spatial_Reference_Information:
    Horizontal_Coordinate_System_Definition:
      Geographic:
        Latitude_Resolution: 1
        Longitude_Resolution: 1
        Geographic_Coordinate_Units: Decimal degrees
  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 for ice-covered
          pixels is made using a different algorithm than for pixels
          not covered by ice.  This is the algorithm used for ice-
          covered pixels:

          if depth <     0 then color = 0x60,0x60,0x60
          if depth <   500 then color = 0x80,0x80,0x80
          if depth <  1000 then color = 0xa0,0xa0,0xa0
          if depth <  1500 then color = 0xc0,0xc0,0xc0
          if depth <  2000 then color = 0xe0,0xe0,0xe0
          if depth < 32767 then color = 0xff,0xff,0xff

          This is the algorithm used for pixels not covered by ice:

          if depth < -5000 then color = 0x00,0x00,0x00
          if depth < -4000 then color = 0x00,0x00,0x10
          if depth < -3000 then color = 0x00,0x00,0x20
          if depth < -2000 then color = 0x00,0x00,0x30
          if depth < -1000 then color = 0x00,0x00,0x40
          if depth <  -900 then color = 0x00,0x00,0x50
          if depth <  -800 then color = 0x00,0x00,0x60
          if depth <  -700 then color = 0x00,0x00,0x70
          if depth <  -600 then color = 0x00,0x00,0x80
          if depth <  -500 then color = 0x00,0x00,0x90
          if depth <  -400 then color = 0x00,0x00,0xa0
          if depth <  -300 then color = 0x00,0x00,0xb0
          if depth <  -200 then color = 0x00,0x00,0xc0
          if depth <  -190 then color = 0x00,0x00,0xd0
          if depth <  -180 then color = 0x00,0x00,0xe0
          if depth <  -170 then color = 0x00,0x00,0xf0
          if depth <  -160 then color = 0x00,0x00,0xff
          if depth <  -150 then color = 0x00,0x10,0xff
          if depth <  -140 then color = 0x00,0x20,0xff
          if depth <  -130 then color = 0x00,0x30,0xff
          if depth <  -120 then color = 0x00,0x40,0xff
          if depth <  -110 then color = 0x00,0x50,0xff
          if depth <  -100 then color = 0x00,0x60,0xff
          if depth <   -90 then color = 0x00,0x70,0xff
          if depth <   -80 then color = 0x00,0x80,0xff
          if depth <   -70 then color = 0x00,0x90,0xff
          if depth <   -60 then color = 0x00,0xa0,0xff
          if depth <   -50 then color = 0x00,0xb0,0xff
          if depth <   -40 then color = 0x00,0xc0,0xff
          if depth <   -30 then color = 0x00,0xd0,0xff
          if depth <   -20 then color = 0x00,0xe0,0xff
          if depth <   -10 then color = 0x00,0xf0,0xff
          if depth <     0 then color = 0x00,0xff,0xff
          if depth <    10 then color = 0x00,0xff,0x00
          if depth <    20 then color = 0x10,0xff,0x00
          if depth <    30 then color = 0x20,0xff,0x00
          if depth <    40 then color = 0x30,0xff,0x00
          if depth <    50 then color = 0x40,0xff,0x00
          if depth <    60 then color = 0x50,0xff,0x00
          if depth <    70 then color = 0x60,0xff,0x00
          if depth <    80 then color = 0x70,0xff,0x00
          if depth <    90 then color = 0x80,0xff,0x00
          if depth <   100 then color = 0x90,0xff,0x00
          if depth <   110 then color = 0xa0,0xff,0x00
          if depth <   120 then color = 0xb0,0xff,0x00
          if depth <   130 then color = 0xc0,0xff,0x00
          if depth <   140 then color = 0xd0,0xff,0x00
          if depth <   150 then color = 0xe0,0xff,0x00
          if depth <   160 then color = 0xf0,0xff,0x00
          if depth <   170 then color = 0xff,0xff,0x00
          if depth <   180 then color = 0xff,0xf0,0x00
          if depth <   190 then color = 0xff,0xe0,0x00
          if depth <   200 then color = 0xff,0xd0,0x00
          if depth <   300 then color = 0xff,0xc0,0x00
          if depth <   400 then color = 0xff,0xb0,0x00
          if depth <   500 then color = 0xff,0xa0,0x00
          if depth <   600 then color = 0xff,0x90,0x00
          if depth <   700 then color = 0xff,0x80,0x00
          if depth <   800 then color = 0xff,0x70,0x00
          if depth <   900 then color = 0xff,0x60,0x00
          if depth <  1000 then color = 0xff,0x50,0x00
          if depth <  2000 then color = 0xff,0x40,0x00
          if depth <  3000 then color = 0xff,0x30,0x00
          if depth <  4000 then color = 0xff,0x20,0x00
          if depth <  5000 then color = 0xff,0x10,0x00
          if depth <  6000 then color = 0xff,0x00,0x00
          if depth < 32767 then color = 0xff,0x00,0x00
        Attribute_Definition_Source: <URL:http://geochange.er.usgs.gov/pub/data/sea_level/Core/raw/src/color_ice4g.c>
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0
            Range_Domain_Maximum: 127
        Attribute_Units_of_Measure: None; the values are indices into a color look-up table.
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