MYD13A1.061 Aqua Vegetation Indices 16-Day Global 500m

Dataset Availability

2002-07-04T00:00:00Z–2024-10-23T00:00:00Z

Dataset Provider

NASA LP DAAC at the USGS EROS Center

Earth Engine Snippet

ee.ImageCollection("MODIS/061/MYD13A1")

Tags

16-day aqua evi global modis nasa ndvi usgs vegetation

myd13a1

Description

The MYD13A1 V6.1 product provides a Vegetation Index (VI) value at a per pixel basis. There are two primary vegetation layers. The first is the Normalized Difference Vegetation Index (NDVI) which 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 second vegetation layer is the Enhanced Vegetation Index (EVI) that minimizes canopy background variations and maintains sensitivity over dense vegetation conditions. The EVI also uses the blue band to remove residual atmosphere contamination caused by smoke and sub-pixel thin cloud clouds. The MODIS NDVI and EVI products are computed from atmospherically corrected bi-directional surface reflectances that have been masked for water, clouds, heavy aerosols, and cloud shadows.

Documentation:

• User's Guide

• Algorithm Theoretical Basis Document (ATBD)

• General Documentation

Bands

Resolution
500 meters

Bands

Name	Units	Min	Max	Scale	Wavelength	Description
NDVI		-2000	10000	0.0001		Normalized Difference Vegetation Index
EVI		-2000	10000	0.0001		Enhanced Vegetation Index
DetailedQA						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		0	10000	0.0001	645nm	Red surface reflectance
sur_refl_b02		0	10000	0.0001	858nm	NIR surface reflectance
sur_refl_b03		0	10000	0.0001	469nm	Blue surface reflectance
sur_refl_b07		0	10000	0.0001	2130nm/2105 - 2155nm	MIR surface reflectance
ViewZenith	deg	0	18000	0.01		View zenith angle
SolarZenith	deg	0	18000	0.01		Solar zenith angle
RelativeAzimuth	deg	-18000	18000	0.01		Relative azimuth angle
DayOfYear		1	366			Julian day of year
SummaryQA						Quality reliability of VI pixel
Bitmask for SummaryQA Bits 0-1: VI quality (MODLAND QA Bits) 0: Good data, use with confidence 1: Marginal data, useful but look at detailed QA for more information 2: Pixel covered with snow/ice 3: Pixel is cloudy

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

Citations:

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

DOIs

• https://doi.org/10.5067/MODIS/MYD13A1.061

Explore with Earth Engine

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('MODIS/061/MYD13A1')
                  .filter(ee.Filter.date('2018-01-01', '2018-05-01'));
var ndvi = dataset.select('NDVI');
var ndviVis = {
  min: 0.0,
  max: 9000.0,
  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

MYD13A1.061 Aqua Vegetation Indices 16-Day Global 500m

The MYD13A1 V6.1 product provides a Vegetation Index (VI) value at a per pixel basis. There are two primary vegetation layers. The first is the Normalized Difference Vegetation Index (NDVI) which is referred to as the continuity index to the existing National Oceanic and Atmospheric Administration-Advanced Very High Resolution Radiometer …

MODIS/061/MYD13A1, 16-day,aqua,evi,global,modis,nasa,ndvi,usgs,vegetation

2002-07-04T00:00:00Z/2024-10-23T00:00:00Z

Google Earth Engine

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

• https://doi.org/10.5067/MODIS/MYD13A1.061