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EDG Data Set Name
MODIS/Terra Vegetation Indices 16-Day L3 Global 500m ISIN Grid
Granule Shortname
MOD13A1
Data Set Characteristics
Area = ~ 10° x 10° lat/long
Size = 2400 x 2400 rows/columns
File Size = ~70 MB (variable)
Resolution = 500 meters
Projection = Integerized Sinusoidal
Data Format = HDF-EOS
Science Data Sets (SDSs) = 11
Product Description
The MOD13A1 image shown above is a sample of the MODIS Level 3 16-day composite of Vegetation Indices at 500m resolution that has been pseudo-colored. This product uses, as input, MODIS Terra surface reflectances, corrected for molecular scattering, ozone absorption, and aerosols. Two vegetation index (VI) algorithms are produced globally for land. One is the standard normalized difference vegetation index (NDVI), which is referred to as the "continuity index" to the existing NOAA-AVHRR derived NDVI. The other is an 'enhanced' vegetation index with improved sensitivity into high biomass regions and improved vegetation monitoring through a de-coupling of the canopy background signal and a reduction in atmosphere influences. The two VIs compliment each other in global vegetation studies and improve upon the extraction of canopy biophysical parameters. A new compositing scheme that reduces angular, sun-target-sensor variations with an option to use BRDF models is utilized. The gridded vegetation indices include quality assurance (QA) flags with statistical data that indicate the quality of the VI product and input data. Due to their implicity, ease of application, and widespread familiarity, vegetation indices have a wide range of usage within the user community. Some of the more common applications may include global biogeochemical and hydrologic modeling, agricultural monitoring and forecasting, land-use planning, land cover characterizaton, and land cover change detection.
NOTE: These products are still experimental in nature upon their initial release. Investigations are underway to assess the scientific validity of these products.
| SDS |
UNITS |
DATA TYPE-bit |
FILL VALUE |
VALID RANGE |
SCALE FACTOR |
| NDVI |
NDVI |
16-bit integer |
-3000 |
-2000-10000 |
10000 |
| EVI |
EVI |
16-bit integer |
-3000 |
-2000-10000 |
10000 |
| NDVI Quality |
bit field |
16-bit unsigned integer |
65535 |
0-65534 |
na |
| EVI Quality |
bit field |
16-bit unsigned integer |
65535 |
0-65534 |
na |
| Red Reflectance |
relectance |
16-bit integer |
-1000 |
0-10000 |
10000 |
| NIR Reflectance |
relectance |
16-bit integer |
-1000 |
0-10000 |
10000 |
| Blue Reflectance |
relectance |
16-bit integer |
-1000 |
0-10000 |
10000 |
| MIR Reflectance |
relectance |
16-bit integer |
-1000 |
0-10000 |
10000 |
| Viewing Zenith Angle |
degree |
16-bit integer |
-10000 |
-9000-9000 |
100 |
| Solar Zenith Angle |
degree |
16-bit integer |
-10000 |
-9000-9000 |
100 |
| Relative Azimuth Angle |
degree |
16-bit integer |
-4000 |
-3600-3600 |
10 |
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EOS Data Gateway Search Tips
| Data Center: |
LPDAAC |
| Sensor: |
MODIS |
| Dataset: |
MODIS/Terra Vegetation Indices 16-Day L3 Global 500m ISIN Grid |
| Geographic Extent: |
Type Lat/Long Range or Draw on Map |
| Temporal Extent: |
August 29, 2002 (2002241) - October 7, 2002 (2002280) |
Product Information
Contact Information
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