NASA SRTM3 SRTMGL30 Data Dictionary

Acquisition Date

• Field Definition:  The date the image was acquired.

               Format:
               YYYY/MM/DD

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
 

Date Entered

• Field Definition:  The date the image was entered into the database.

               Format:
               YYYY/MM/DD
 

Date Updated

• Field Definition:  The date the image was last updated.

              Format:
              YYYY/MM/DD
 

End Acquisition Date

• Field Definition:  Ending date of image series

               Format:
               YYYY/MM/DD
 

Entity ID

• Field Definition:  This field uniquely identifies the granule id of the individual scene.
  
  Example W020N90.SRTMGL30
  
  E or W (E = East, W = West hemisphere)
  Next three characters indicate lower left corner Longitude
  N or S (N = North, S = South hemisphere)
  Next two characters indicate lower left corner Latitude Longitude
  SRTM = Data set designator
  GL= Global
  30 = Arc Second
   

Resolution

• Field Definition:  The geographic reference system treats the globe as if it were a sphere divided into 360 equal parts called degrees. Each degree is subdivided into 60 minutes. Each minute is composed of 60 seconds. Said differently, an arc-second represents the distance of latitude or longitude traversed on the earth's surface while traveling one second (1/3600th of a degree).
   

Start Acquisition Date

• Field Definition:  Beginning date of image series

              Format:
              YYYY/MM/DD
 

Version

• Field Definition:  Version number assigned to image