ASTER Global Digital Elevation Model V001 Data Dictionary

 

 

Acquisition Date

• Field Definition:  The starting acquisition date the image was acquired.

         Format:

             YYYY/MM/DD

 

Agency

• Field Definition:  The Agency which provided the data.

 

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.

 

Check Sum Value

• Field Definition:  The size, in bits, of the scene during transmission, used to check for transmission errors.

 

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

 

Data Entered

• Field Definition:  The date the data was entered into collection.

 

Date of Update

• Field Definition:  The Date of Update refers to the date the inventory record was last updated.

 

Entity ID

• Field Definition:  This field uniquely identifies individual ASTER Global DEM images.

          Format:

          ASTGDEMV1_1N01E172

          ASTGDEM = ASTER Global DEM

          1N01E172 = Southwest Corner Coordinate (rounded)

 

Ellipsoid

• Field Definition:  The name of ellipsoid used to process this product.

           Values:

           Valid code:

           WGS84

 

File Size

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

 

Image Resolution

• Field Definition:  These field identifies the resolution of the image.

          Values:

          1-ARC Second

 

Map Projection

• Field Definition:  The map projection of the image.

          Values:

          Geographic

 

Number of Bands

• Field Definition:  The number of bands in image.

          Values:

          2

 

License ID

• Field Definition:  License ID which identifies which agency has access to the data.

 

License Uplift Update

• Field Definition:  Date and time the license id was last updated.

 

Product Format

• Field Definition:  The format of the product available for customer use.

          Values:

          GEOTIFF

 

Sensor

• Field Definition:  The name of sensor.

          Values:

          ASTER

 

Type of Sensor

• Field Definition:  Sensor Type available; Global DEM (GDEM).

 

Units

• Field Definition:  The units of measurement.

          Values:

          Degrees

 

Vendor

• Field Definition:  The name of Vendor providing data.

          Values:

          NASA/METI

 

Version Number

• Field Definition:  The Version number of data.

          Values:

          1.1

          2.0