Vegetation Drought Response Index (VegDRI) Data Dictionary
The Data Dictionaries are a set of information describing the contents, format, and structure of elements for EarthExplorer products.
- Field Definition: USGS EROS is the agency associated with this collection.
- Field Definition: The first date of image acquisition for the eMODIS NDVI composite used to generate the VegDRI product.
- Field Definition: The latitude and longitude are provided in decimal degrees for the following fields:
Values:
Coordinates in decimal degrees for the following fields:
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 EarthExplorer.
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
- Field Definition: The date the product was updated in the database at USGS EROS. A blank field indicates that the data not been updated.
- Field Definition: The last date of image acquisition for the eMODIS NDVI composite used to generate the VegDRI product.
- Field Definition: A unique identification code given to each scene based on dataset designator, region, begin date, end date, and version number associated with the product.
Format:
V = VegDRI
T = T for Terra or A for Aqua (platform)
M = MODIS (sensor)
CONUS = Region (CONUS = Conterminous US)
2009 = Year of begin date
04 = Month of begin date
22 = Day of begin date
2009 = Year of end date
04 = Month of end date
28 = Day of end date
01 = Version number of VegDri product*
*VegDRI Version 1 product was processed using MODIS Version/Collection 5 source data. Version 2 utilizes MODIS Version/Collection 6 source data.
Example:
VTMCONUS2008042222009042801
- Field Definition: Geographic projection used to map the product.
Values:
Lambert Azimuth Equal Area
- Field Definition: The total number of acquisition days contained in the collection period for the eMODIS NDVI composite used to generate the VegDRI product.
- Field Definition: The distance on the ground represented by each pixel in meters.
- Field Definition: The satellite which acquired the data.
Values:
Aqua
Terra
VIIRS
- Field Definition: Type of data available for download.
Values:
VegDRI
- Field Definition: The center latitude and longitude of the project area.
Format:
DD = Degrees (Valid Values: 0-90 for Latitude)
DDD = Degrees (Valid Values 0-180 for Longitude)
H = Hemisphere (Valid Values: N or S for Latitude, E or W for Longitude)
Note: Minutes and seconds are zero-filled
Example:
DDH, DDDH
- Field Definition: Geographic area of the product.
Values:
Conterminous US
- Field Definition: The instrument used to acquire the data for the NDVI composite.
Values:
MODIS
VIIRS
- Field Definition: The version for the MODIS source data used to generate the VegDRI product. The VegDRI data set utilizes MODIS Version/Collection 5 source data. VegDRI V6 utilizes MODIS Version/Collection 6 source data.
The Data Dictionaries are a set of information describing the contents, format, and structure of elements for EarthExplorer products.
- Field Definition: USGS EROS is the agency associated with this collection.
- Field Definition: The first date of image acquisition for the eMODIS NDVI composite used to generate the VegDRI product.
- Field Definition: The latitude and longitude are provided in decimal degrees for the following fields:
Values:
Coordinates in decimal degrees for the following fields:
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 EarthExplorer.
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
- Field Definition: The date the product was updated in the database at USGS EROS. A blank field indicates that the data not been updated.
- Field Definition: The last date of image acquisition for the eMODIS NDVI composite used to generate the VegDRI product.
- Field Definition: A unique identification code given to each scene based on dataset designator, region, begin date, end date, and version number associated with the product.
Format:
V = VegDRI
T = T for Terra or A for Aqua (platform)
M = MODIS (sensor)
CONUS = Region (CONUS = Conterminous US)
2009 = Year of begin date
04 = Month of begin date
22 = Day of begin date
2009 = Year of end date
04 = Month of end date
28 = Day of end date
01 = Version number of VegDri product*
*VegDRI Version 1 product was processed using MODIS Version/Collection 5 source data. Version 2 utilizes MODIS Version/Collection 6 source data.
Example:
VTMCONUS2008042222009042801
- Field Definition: Geographic projection used to map the product.
Values:
Lambert Azimuth Equal Area
- Field Definition: The total number of acquisition days contained in the collection period for the eMODIS NDVI composite used to generate the VegDRI product.
- Field Definition: The distance on the ground represented by each pixel in meters.
- Field Definition: The satellite which acquired the data.
Values:
Aqua
Terra
VIIRS
- Field Definition: Type of data available for download.
Values:
VegDRI
- Field Definition: The center latitude and longitude of the project area.
Format:
DD = Degrees (Valid Values: 0-90 for Latitude)
DDD = Degrees (Valid Values 0-180 for Longitude)
H = Hemisphere (Valid Values: N or S for Latitude, E or W for Longitude)
Note: Minutes and seconds are zero-filled
Example:
DDH, DDDH
- Field Definition: Geographic area of the product.
Values:
Conterminous US
- Field Definition: The instrument used to acquire the data for the NDVI composite.
Values:
MODIS
VIIRS
- Field Definition: The version for the MODIS source data used to generate the VegDRI product. The VegDRI data set utilizes MODIS Version/Collection 5 source data. VegDRI V6 utilizes MODIS Version/Collection 6 source data.