Global 30 Arc-Second Elevation Data Set Dictionary

 

Acquisition Date

• Field Definition:  The acquisition date of the product.

 

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 Updated

• Field Definition:  Date the data was last updated.

 

DEM Available

• Field Definition:  The availability of the DEM is expressed by Y or N.

 

DEM File Size

• Field Definition:  The size of the DEM file.

 

Entity ID

• Field Definition:  This field uniquely identifies each scene.

          Format:

         GT30E060N90

         SRTM = Dataset designator

        GT30 = Global Topo 30 minute

        N or S (N = North, S = South hemisphere)

        Next two charaters indicate lower left corner Latitude

        E or W (E = East, W = West hemisphere)

        Next three charaters indicate lower left corner Longitude

 

GEOTIFF Available

• Field Definition:  The availability of the GEOTIFF expressed by Y or N.

 

GEOTIFF File Size

• Field Definition:  The size of the GEOTIFF file.

 

Month Number of Acquisition

• Field Definition:  The month number of acquisition.