NASA SRTM3 Data Dictionary

NASA SRTM3 Data Dictionary

Acquisition End Date

• Field Definition:  The last day of data acquisition

               Format:
               YYYY/MM/DD
 

Acquisition Start Date

• Field Definition:  The first day of data acquisition

               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 data file was entered into the database.

               Format:
               YYYY/MM/DD
 

Date Updated

• Field Definition:  The date the data file was last updated in the database.

               Format:
               YYYY/MM/DD
 

Entity ID

• Field Definition:  This field uniquely identifies the granule id of the individual scene.

               Format:
               LatLon.PPPPPPP

               Lat = Latitude for the lower left corner of the 1 x 1 degree tile (N = North, S = South hemisphere)
               Lon = Longitude for the lower left corner of the 1 x 1 degree tile (E = East, W = West hemisphere)
               PPPPPPP = Product Short Name (Number of characters may vary by data set)

               Example:
               N34E032.SRTMGL1
 

Resolution

• Field Definition:  The resolution identified the pixel size in arc-seconds.

               Values:
               1 arc-second (approximately 30 meters)
               3 arc-second (approximately 90 meters)
               30 arc-second (approximately 1,000 meters)
 

Version

• Field Definition:  The version number of the data set.