Landsat Orthorectified MSS Data Dictionary

Acquisition Date

• Field Definition:  The date the image 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
 

Entity ID

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

               Example:
               EMP039R28_2M19780714
               Valid Format: xxPpppRrrstyyyymmdd
               xx= Data set identifier
               EM = MSS
               P = Path Number; next three characters
               ppp = Path number
               R = Row Number; next two characters
               rr = Row number
               s = Satellite number
               2 = Landsat 2
               M = (MSS) Sensor Type
               yyyy = Year of acquisition
               mm = Month of acquisition
               dd = Day of acquisition
 

Scene Size

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

Satellite Number

• Field Definition:  The satellite which acquired the data.

               Valid Codes:
               Landsat 1 (MSS)
               Landsat 2 (MSS)
               Landsat 3 (MSS)
               Landsat 4 (MSS)
               Landsat 5 (MSS)
 

Sun Azimuth

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

               Values:
              -180.00 through +180.00 degrees (with 2-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 +90.00 (with a 2-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 Row is the latitudinal center line of a Landsat scene. This nominal configuration begins with row 1 at North 80 degrees 47 minutes and ends at row 122 at South 81 degrees 51 minutes for daylight acquisitions. Row 60 corresponds with the equator at 0 degrees latitude. A total of 248 rows are involved for all Landsat missions. Rows 123-248 are associated with night acquisitions.
   

Zone Number

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