Landsat Orthorectified TM Data Dictionary

Acquisition Date

• Field Definition:  The date the image was acquired.

               Format:

               YYYY/MM/DD

 

Band 6 Missing

• Field Definition:  This field identifies whether or not band 6 is missing.

               Values:

               Y = Yes, band 6 is missing

               Null = Band 6 is present

 

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

 

Entity ID

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

              Example:

              ETP011R55_4T19871222

              Valid Format: xxPpppRrrrstyyyymmdd

              xx= Data set identifier

              ET = TM

              P = Path Number; next three characters

              ppp = Path number

              R = Row Number; next three characters

              rrr = Row number

              s = Satellite number

              4 = Landsat 4

              5 = Landsat 5

              t = Sensor Type

              yyyy = Year of acquisition

              mm = Month of acquisition

              dd = Day of acquisition

 

Satellite Number

• Field Definition:  The satellite which acquired the data.

               Valid Codes:

               Landsat 4 (TM)

               Landsat 5 (TM)

 

Scene Size

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

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 +90.000000 (with a 7-digit precision)

 

WRS Path

• Field Definition:  The Path is the longitudinal center line of a Landsat scene, corresponding to the center of an orbital track. Sequential numbers from east to west are assigned to 233 nominal satellite tracks for Landsat 4 and 5. Landsat 1-3 satellites have 251 tracks (paths). Path numbers can be used with Row numbers to designate a geographic search for a nominal scene center. The consistency and repeatability of the path for each satellite provides a common reference for all scenes acquired. The path is also a key indexing field for subsequent acquisition requests as well as data base inquiries.

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 image.