eMODIS NDVI Data Dictionary

 

Agency

• Field Definition:  The U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center is the agency responsible for maintenance and distribution of this data.

 

Area of Interest

• Field Definition:  The geographic area represented in the product.

          Values:

          * Area Designators

          AF = Africa

          AK = Alaska

          AZ – Australia, New Zealand, and Indonesia

          CC = Central America and Caribbean

          CA = Central Asia

          SA = South America

          US = Continental United States

 

Begin Date

• Field Definition:  The first day of data acquisition for the source data at the start of the collection period. The begin date and end date are used to indicate the date range for the product.

 

Comments

• Field Definition:  An indication of the completeness of the data which may include comments on missing or limited data.

 

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

 

End Date

• Field Definition:  The last day of data acquisition for the source data at the end of the collection period. The begin date and end date are used to indicate the date range for the product.

 

Entity ID

• Field Definition:  The naming convention of each file is based on product attributes.

          Format:

         EMAAPYYYYMMDDyyyymmddV

 

         EM = Dataset Designator (eMODIS)

         AA = Area of Interest*

         P = Platform: T = Terra, A = AQUA

         YYYYMMDD = Begin date of cycle

         yyyymmdd = End date of cycle

         V = Version of source data

 

         * Area Designators

         AF = Africa

         AK = Alaska

         AZ = Australia, New Zealand, and Indonesia

         CC = Central America and Caribbean

         CA = Central Asia

         SA = South America

         US = United States

         Example:

              EMAKT20080812200808185

 

Map Projection

• Field Definition:  The method of representing the surface of the earth on a plane using grid lines of latitude and longitude.

          Values:

          Albers Conical Equal Area

          Geographic

          Lambert Azimuthal Equal Area

 

Platform

• Field Definition:  The Terra and Aqua satellites carry the MODIS sensor.

 

Sensor

• Field Definition:  The Moderate Resolution Imaging Spectroradiometer (MODIS) is the instrument on the satellite used to acquire the source data for the product.

 

Version

• Field Definition:  The version of MODIS source data used to create the product. The original eMODIS NDVI data set was processed using MODIS Version/Collection 5 source data.