Landsat Orthorectified ETM+ and ETM+ Pansharpened Data Dictionary

Acquisition Date

• Field Definition:  The year, month and day the scene was acquired.

               Format:
               YYYY/MM/DD
 

Browse Availability

• Field Definition:  This flag identifies whether or not the entity has a browse image available with it. A browse image provides the user with a visual overview of an inventory item. The browse image is an online digitally subsampled raster image.

              Valid Codes:
              Y = Yes
              N = No
 

Coordinates - Decimal Degrees

• Field Definition:  : The latitude and longitude are provided in decimal degrees for the following fields:
  
  Values:
  Scene Center Latitude and Longitude
  Northeast (NE) Corner Latitude and Longitude
  Northwest (NW) Corner Latitude and Longitude
  Southeast (SE) Corner Latitude and Longitude
  Southwest (SW) Corner Latitude and Longitude
  
  Latitude Format Decimal Degrees: -90.000 through 90.000
  Longitude Format Decimal Degrees: -180.000 through 180.000
  
  Number of decimal places will vary by dataset – check collection in EE.
   

Coordinates - Degrees, Minutes, Seconds

• Field Definition:  The latitude and longitude are provided in degrees, minutes, and seconds for the following fields:
  
  Values:
  Scene Center Latitude and Longitude
  Northeast (NE) Corner Latitude and Longitude
  Northwest (NW) Corner Latitude and Longitude
  Southeast (SE) Corner Latitude and Longitude
  Southwest (SW) Corner Latitude and Longitude
  
  Longitude Format:
  DDDMMSS.SSH
  DDD = Degree(s) with a range of 0 through 180
  MM = Minute(s) with a range of 0 through 59
  SS.SS = Second(s) with a range of 0 through 59.99
  H = Hemisphere with E for east and W for west
  
  Latitude Format:
  DDMMSS.SSH
  DD = Degree(s) with a range of 0 through 90
  MM = Minutes(s) with a range of 0 through 59
  SS.SS = Second(s) with a range of 0 through 59.99
  H = Hemisphere with N for north and S for south
   

Datum

• Field Definition:  The datum associated with the image.

               Valid Code:
               WGS 84 = Worldgeodetic System 1984
 

Entity ID

• Field Definition:  This field uniquely identifies the individual landsat scene.

               Example:
               ELP029R030_7T20010804

               Example Orthorectified ETM+ Pan-sharpened Entity ID: EPP189R026_7F20000802

               Valid Format: xxPpppRrrrstyyyymmdd
               xx= Data set identifier
               EL = ETM+
               EP = ETM+ Pansharpened
               P = Path Number; next three characters
               ppp = Path number
               R = Row Number; next three characters
               rrr = Row number
               s = Satellite number
               7 = ETM+
               t = Sensor Type
               T = 28.5 multi-spectral data (6 bands)
               F = Data fusion
               yyyy = Year of acquisition
               mm = Month of acquisition
               dd = Day of acquisition
 

Orientation

• Field Definition:  The orientation of the image.

               Values:
               Valid code = NUP (North Up)
 

Pan-sharpened Flag

• Field Definition:  This field identifies whether or not the pan-sharpening process was applied to the image. This process involves a resolution merging process, which allowed the fusion of the higher-resolution panchromatic band (8) with selected lower-resolution multi-spectral bands (7,4,2) to create a higher-resolution ("pan-sharpened") color image was applied to the image. (ETM+ Pan-sharpened collection only).

              Values:
              Valid Codes = Y; Image is pan sharpened
 

QA Percent Missing Data

• Field Definition:  Estimated percentage of scene missing or unusable

               Values:
               Valid Values = 0 - 100
 

Resampling Technique

• Field Definition:  The resampling applied to the scene.

               Valid Codes:
               CC = Cubic Convolution
               NN = Nearest Neighbor
 

Satellite Number

• Field Definition:  The satellite which acquired the data.

               Values:
               Valid Codes = Landsat 7 (ETM+)
 

Scene Size

• Field Definition:  The size of all files associated with the scene, in megabytes.
   

Sensor

• Field Definition:  The sensor which acquired the data.

               Valid Code:
               ETM+ (Enhanced Thematic Mapper Plus)
 

Sun Azimuth

• Field Definition:  The Sun azimuth angle at the "true" WRS scene center. Azimuth is the angle of horizontal deviation, measured clockwise from the north.

               Values:
               -180.0000000 through +180.0000000 degrees (with 7-digit precision)

               NOTE: A positive value
 

Sun Elevation

• Field Definition:  The Sun elevation angle at the "true" WRS scene center. Elevation is the angle of vertical deviation from the tangent to the earth's surface (at scene center point) to the line between the sun's center and the scene center point. NOTE: The solar zenith angle will be 90 degrees minus the solar elevation angle.

               Values:
               0 through +90.0000000 (with a 7-digit precision)
 

WRS Path

• Field Definition:  The WRS-2 Path number associated with the scene.

               Values:
               001 through 233
 

WRS Row

• Field Definition:  The WRS-2 Row number associated with the scene.

              Values:
              001 through 244
 

Zone Number

• Field Definition:  The UTM zone number associated with the scene.