MYD13A2.061 Aqua Vegetation Indices 16-Day Global 1km

AI-generated Key Takeaways

The MYD13A2 V6.1 product provides both the Normalized Difference Vegetation Index (NDVI) and the Enhanced Vegetation Index (EVI).
Data is available from July 4, 2002, to September 22, 2025, with updates every 16 days.
The algorithm selects the best available pixel value over the 16-day period based on low clouds, low view angle, and highest NDVI/EVI.
The dataset includes various bands such as vegetation indices, quality indicators, surface reflectance bands, and view/solar angles.
MODIS data and products from LP DAAC have no restrictions on subsequent use, sale, or redistribution.

Dataset Availability: 2002-07-04T00:00:00Z–2025-10-24T00:00:00Z
Dataset Provider: NASA LP DAAC at the USGS EROS Center

Cadence: 16 Days
Tags: 16-day aqua evi global modis nasa ndvi usgs vegetation vegetation-indices
myd13a2

Description

The MYD13A2 V6.1 product provides two Vegetation Indices (VI): the Normalized Difference Vegetation Index (NDVI) and the Enhanced Vegetation Index (EVI). The NDVI is referred to as the continuity index to the existing National Oceanic and Atmospheric Administration-Advanced Very High Resolution Radiometer (NOAA-AVHRR) derived NDVI. The EVI has improved sensitivity over high biomass regions.

The algorithm for this product chooses the best available pixel value from all the acquisitions from the 16-day period. The criteria used are low clouds, low view angle, and the highest NDVI/EVI value.

Documentation:

Bands

Pixel Size 1000 meters

Bands

Name

Units

Min

Max

Scale

Pixel Size

Wavelength

Description

NDVI

-2000

10000

0.0001

meters

None

16-day NDVI average

EVI

-2000

10000

0.0001

meters

None

16-day EVI average

DetailedQA

meters

None

VI Quality indicators

Bitmask for DetailedQA

Bits 0-1: VI quality (MODLAND QA Bits)
- 0: VI produced with good quality
- 1: VI produced, but check other QA
- 2: Pixel produced, but most probably cloudy
- 3: Pixel not produced due to other reasons than clouds
Bits 2-5: VI usefulness
- 0: Highest quality
- 1: Lower quality
- 2: Decreasing quality
- 4: Decreasing quality
- 8: Decreasing quality
- 9: Decreasing quality
- 10: Decreasing quality
- 12: Lowest quality
- 13: Quality so low that it is not useful
- 14: L1B data faulty
- 15: Not useful for any other reason/not processed
Bits 6-7: Aerosol Quantity
- 0: Climatology
- 1: Low
- 2: Intermediate
- 3: High
Bit 8: Adjacent cloud detected
- 0: No
- 1: Yes
Bit 9: Atmosphere BRDF correction
- 0: No
- 1: Yes
Bit 10: Mixed Clouds
- 0: No
- 1: Yes
Bits 11-13: Land/water mask
- 0: Shallow ocean
- 1: Land (nothing else but land)
- 2: Ocean coastlines and lake shorelines
- 3: Shallow inland water
- 4: Ephemeral water
- 5: Deep inland water
- 6: Moderate or continental ocean
- 7: Deep ocean
Bit 14: Possible snow/ice
- 0: No
- 1: Yes
Bit 15: Possible shadow
- 0: No
- 1: Yes

sur_refl_b01

10000

0.0001

meters

620-670nm

Surface reflectance band 1 (red)

sur_refl_b02

10000

0.0001

meters

841-876nm

Surface reflectance band 2 (near-infrared)

sur_refl_b03

10000

0.0001

meters

459-479nm

Surface reflectance band 3 (blue)

sur_refl_b07

10000

0.0001

meters

2105-2155nm

Surface reflectance band 7 (mid-infrared)

ViewZenith

deg

18000

0.01

meters

None

View zenith angle of VI Pixel

SolarZenith

deg

18000

0.01

meters

None

Sun zenith angle of VI pixel

RelativeAzimuth

deg

-18000

18000

0.01

meters

None

Relative azimuth angle of VI pixel

DayOfYear

Julian Day

366

meters

None

Day of year VI pixel

SummaryQA

meters

None

Quality reliability of VI pixel

SummaryQA Class Table

Value	Color	Description
0	None	Good Data: use with confidence
1	None	Marginal Data: useful, but look at other QA information
2	None	Snow/Ice: target covered with snow/ice
3	None	Cloudy: target not visible, covered with cloud

Terms of Use

Terms of Use

MODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.

Citations

Please visit LP DAAC 'Citing Our Data' page for information on citing LP DAAC datasets.

DOIs

https://doi.org/10.5067/MODIS/MYD13A2.061

Explore with Earth Engine

Code Editor (JavaScript)

 var 
  
 dataset 
  
 = 
  
 ee 
 . 
 ImageCollection 
 ( 
 'MODIS/061/MYD13A2' 
 ) 
  
 . 
 filter 
 ( 
 ee 
 . 
 Filter 
 . 
 date 
 ( 
 '2018-01-01' 
 , 
  
 '2018-05-01' 
 )); 
 var 
  
 ndvi 
  
 = 
  
 dataset 
 . 
 select 
 ( 
 'NDVI' 
 ); 
 var 
  
 ndviVis 
  
 = 
  
 { 
  
 min 
 : 
  
 0 
 , 
  
 max 
 : 
  
 9000 
 , 
  
 palette 
 : 
  
 [ 
  
 'ffffff' 
 , 
  
 'ce7e45' 
 , 
  
 'df923d' 
 , 
  
 'f1b555' 
 , 
  
 'fcd163' 
 , 
  
 '99b718' 
 , 
  
 '74a901' 
 , 
  
 '66a000' 
 , 
  
 '529400' 
 , 
  
 '3e8601' 
 , 
  
 '207401' 
 , 
  
 '056201' 
 , 
  
 '004c00' 
 , 
  
 '023b01' 
 , 
  
 '012e01' 
 , 
  
 '011d01' 
 , 
  
 '011301' 
  
 ], 
 }; 
 Map 
 . 
 setCenter 
 ( 
 6.746 
 , 
  
 46.529 
 , 
  
 2 
 ); 
 Map 
 . 
 addLayer 
 ( 
 ndvi 
 , 
  
 ndviVis 
 , 
  
 'NDVI' 
 );

Open in Code Editor

MYD13A2.061 Aqua Vegetation Indices 16-Day Global 1km

MODIS/061/MYD13A2, 16-day,aqua,evi,global,modis,nasa,ndvi,usgs,vegetation,vegetation-indices

2002-07-04T00:00:00Z/2025-10-24T00:00:00Z

-90 -180 90 180

Google Earth Engine

https://developers.google.com/earth-engine/datasets

MYD13A2.061 Aqua Vegetation Indices 16-Day Global 1km Stay organized with collections Save and categorize content based on your preferences.

AI-generated Key Takeaways

Description

Bands

Terms of Use

Citations

DOIs

Explore with Earth Engine

Code Editor (JavaScript)

MYD13A2.061 Aqua Vegetation Indices 16-Day Global 1km