ASTER Global Digital Elevation Model 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

 

Agency

• Field Definition:  ASTER GDEM and the Water Body Database were developed jointly by the U.S. National Aeronautics and Space Administration (NASA) and Japan’s Ministry of Economy, Trade, and Industry (METI).

 

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

 

DOI Authority

• Field Definition:  The Digital Object Identifier (DOI) Authority provides the infrastructure for the registration and services for a persistent reference. The DOI authority is used along with the DOI Name to view the associated URL for the product.

          Example:

          https://doi.org

 

DOI Name

• Field Definition:  Digital Object Identifier is used to uniquely and permanently identify a dataset. The DOI Name is more stable than a URL and is used as a permanent reference for the product. The DOI Name can be entered into a DOI Authority system to view the associated URL for the product (https://doi.org/10.5067/ASTER/ASTGTM.003).

          Example:

          10.5067/ASTER/ASTGTM.003

 

Entity ID

• Field Definition:  The name of an individual file.

          Format:

          PPPPPPVVVV_LatLon.zip

 

          PPPPPP= Product Short Name (Number of characters may vary by data set)

          VVVV = Data product version

          LatLon = 1 x 1 degree grid

          zip = Compressed data format

          Example:

          ASTER GDEM Example: ASTGTMV003_N23W078.zip

          ASTER WBD Example: ASTWBDV001_N00E040.zip

 

Local Granule ID

• Field Definition:  The name of an individual file.

          Format:

          PPPPPPVVVV_LatLon.zip

 

         PPPPPP= Product Short Name (Number of characters may vary by data set)

         VVVV = Data product version

         LatLon = 1 x 1 degree grid

         zip = Compressed data format

         Example:

         ASTER GDEM Example: ASTGTMV003_N23W078.zip

         ASTER WBD Example: ASTWBDV001_N00E040.zip

 

Version Number

• Field Definition:  The version number of the data.

          Values:

          1