eVIIRS NDVI Data Dictionary

• Agency
• Area of Interest
• Begin Date
• Comments
• Coordinates Decimal Degrees
• Coordinates Degrees, Minutes, Seconds
• End Date
• Entity ID
• Map Projection
• Platform
• Sensor
• Version

Agency

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

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:

EVAZJ 2026 06 01 2026 06 101

EV = Dataset Designator (eVIIRS)

AZ = Australia, New Zealand, and Indonesia 

P = Platform: J = JPSS-1, JPSS-2 (NOAA-20, NOAA-21)

YYYYMMDD = Begin date of cycle

yyyymmdd = End date of cycle

V = Version of source data

Example:

EVAZJ 2026 06 01 2026 06 101

Map Projection

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

Platform

          Field Definition:  The NOAA-20 and NOAA-21 satellites carry the VIIRS sensor.

Sensor

          Field Definition:  The Visible Infrared Imaging Radiometer Suite (VIIRS) sensor is the instrument used to acquire the data.

Version

          Field Definition:  The version of eVIIRS source data used to create the product.