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.
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 …
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["\u003cp\u003eMYD13A2 V6.1 provides Normalized Difference Vegetation Index (NDVI) and Enhanced Vegetation Index (EVI) data on a 16-day global scale at 1km resolution.\u003c/p\u003e\n"],["\u003cp\u003eThe data is collected by the MODIS sensor on the Aqua satellite and is available from 2002-07-04 to 2024-11-08.\u003c/p\u003e\n"],["\u003cp\u003eThe product includes quality assessment bands and surface reflectance information for select spectral bands.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is provided by NASA LP DAAC at the USGS EROS Center and is freely available for use, sale, and redistribution.\u003c/p\u003e\n"],["\u003cp\u003eUsers can access and analyze this dataset through Google Earth Engine.\u003c/p\u003e\n"]]],["The MYD13A2 V6.1 dataset, provided by NASA LP DAAC, offers 16-day global vegetation indices (NDVI and EVI) from July 4, 2002, to January 25, 2025. The data is derived from the Aqua satellite, and each pixel represents the best available value from the 16-day period, with low clouds, low view angle, and high NDVI/EVI values as selection criteria. It can be accessed via Google Earth Engine using a provided code snippet.\n"],null,["# MYD13A2.061 Aqua Vegetation Indices 16-Day Global 1km\n\nDataset Availability\n: 2002-07-04T00:00:00Z--2025-08-05T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA LP DAAC at the USGS EROS Center](https://doi.org/10.5067/MODIS/MYD13A2.061)\n\nCadence\n: 16 Days\n\nTags\n:\n [16-day](/earth-engine/datasets/tags/16-day) [aqua](/earth-engine/datasets/tags/aqua) [evi](/earth-engine/datasets/tags/evi) [global](/earth-engine/datasets/tags/global) [modis](/earth-engine/datasets/tags/modis) [nasa](/earth-engine/datasets/tags/nasa) [ndvi](/earth-engine/datasets/tags/ndvi) [usgs](/earth-engine/datasets/tags/usgs) [vegetation](/earth-engine/datasets/tags/vegetation) [vegetation-indices](/earth-engine/datasets/tags/vegetation-indices) \nmyd13a2 \n\n#### Description\n\nThe MYD13A2 V6.1 product provides two Vegetation Indices (VI): the Normalized\nDifference Vegetation Index (NDVI) and the Enhanced Vegetation Index (EVI).\nThe NDVI is referred to as the continuity index to the existing National\nOceanic and Atmospheric Administration-Advanced Very High Resolution\nRadiometer (NOAA-AVHRR) derived NDVI. The EVI has improved sensitivity over\nhigh biomass regions.\n\nThe algorithm for this product chooses the best available\npixel value from all the acquisitions from the 16-day period. The criteria\nused are low clouds, low view angle, and the highest NDVI/EVI value.\n\nDocumentation:\n\n- [User's Guide](https://lpdaac.usgs.gov/documents/103/MOD13_User_Guide_V6.pdf)\n\n- [Algorithm Theoretical Basis Document (ATBD)](https://lpdaac.usgs.gov/documents/104/MOD13_ATBD.pdf)\n\n- [General Documentation](https://ladsweb.modaps.eosdis.nasa.gov/filespec/MODIS/61/MYD13A2)\n\n### Bands\n\n\n**Pixel Size**\n\n1000 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Scale | Pixel Size | Wavelength | Description |\n|-------------------|------------|--------|-------|--------|------------|-------------|--------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `NDVI` | | -2000 | 10000 | 0.0001 | meters | None | 16-day NDVI average |\n| `EVI` | | -2000 | 10000 | 0.0001 | meters | None | 16-day EVI average |\n| `DetailedQA` | | | | | meters | None | VI Quality indicators |\n| 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 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `sur_refl_b01` | | 0 | 10000 | 0.0001 | meters | 620-670nm | Surface reflectance band 1 (red) |\n| `sur_refl_b02` | | 0 | 10000 | 0.0001 | meters | 841-876nm | Surface reflectance band 2 (near-infrared) |\n| `sur_refl_b03` | | 0 | 10000 | 0.0001 | meters | 459-479nm | Surface reflectance band 3 (blue) |\n| `sur_refl_b07` | | 0 | 10000 | 0.0001 | meters | 2105-2155nm | Surface reflectance band 7 (mid-infrared) |\n| `ViewZenith` | deg | 0 | 18000 | 0.01 | meters | None | View zenith angle of VI Pixel |\n| `SolarZenith` | deg | 0 | 18000 | 0.01 | meters | None | Sun zenith angle of VI pixel |\n| `RelativeAzimuth` | deg | -18000 | 18000 | 0.01 | meters | None | Relative azimuth angle of VI pixel |\n| `DayOfYear` | Julian Day | 1 | 366 | | meters | None | Day of year VI pixel |\n| `SummaryQA` | | | | | meters | None | Quality reliability of VI pixel |\n\n**SummaryQA Class Table**\n\n| Value | Color | Description |\n|-------|-------|---------------------------------------------------------|\n| 0 | None | Good Data: use with confidence |\n| 1 | None | Marginal Data: useful, but look at other QA information |\n| 2 | None | Snow/Ice: target covered with snow/ice |\n| 3 | None | Cloudy: target not visible, covered with cloud |\n\n### Terms of Use\n\n**Terms of Use**\n\nMODIS data and products acquired through the LP DAAC\nhave no restrictions on subsequent use, sale, or redistribution.\n\n### Citations\n\nCitations:\n\n- Please visit [LP DAAC 'Citing Our Data' page](https://lpdaac.usgs.gov/citing_our_data)\n for information on citing LP DAAC datasets.\n\n### DOIs\n\n- \u003chttps://doi.org/10.5067/MODIS/MYD13A2.061\u003e\n\n### Explore with Earth Engine\n\n| **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.ImageCollection('MODIS/061/MYD13A2')\n .filter(ee.Filter.date('2018-01-01', '2018-05-01'));\nvar ndvi = dataset.select('NDVI');\nvar ndviVis = {\n min: 0,\n max: 9000,\n palette: [\n 'ffffff', 'ce7e45', 'df923d', 'f1b555', 'fcd163', '99b718', '74a901',\n '66a000', '529400', '3e8601', '207401', '056201', '004c00', '023b01',\n '012e01', '011d01', '011301'\n ],\n};\nMap.setCenter(6.746, 46.529, 2);\nMap.addLayer(ndvi, ndviVis, 'NDVI');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_061_MYD13A2) \n[MYD13A2.061 Aqua Vegetation Indices 16-Day Global 1km](/earth-engine/datasets/catalog/MODIS_061_MYD13A2) \nThe 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 ... \nMODIS/061/MYD13A2, 16-day,aqua,evi,global,modis,nasa,ndvi,usgs,vegetation,vegetation-indices \n2002-07-04T00:00:00Z/2025-08-05T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/MODIS/MYD13A2.061](https://doi.org/https://doi.org/10.5067/MODIS/MYD13A2.061)\n- [https://doi.org/10.5067/MODIS/MYD13A2.061](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MYD13A2)"]]
