MYD13A1.005 Vegetation Indices 16-Day L3 Global 500m [deprecated]

Page Summary

• This dataset provides global MODIS vegetation indices designed for consistent spatial and temporal comparisons of vegetation conditions.

• The dataset includes both the Normalized Difference Vegetation Index (NDVI) and the Enhanced Vegetation Index (EVI), computed from atmospherically corrected surface reflectances.

• Global MYD13A1 data is available every 16 days at 500-meter spatial resolution and can be used for global monitoring, modeling biogeochemical and hydrologic processes, and characterizing land surface properties.

• This version of the dataset has been superseded by MODIS/061/MYD13A1 and has attained Validation Stage 3.

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

Caution: This dataset has been superseded by MODIS/061/MYD13A1.

Dataset Availability

2002-07-04T00:00:00Z–2017-03-14T00:00:00Z

Dataset Producer

NASA LP DAAC at the USGS EROS Center

Earth Engine Snippet

ee.ImageCollection("MODIS/MYD13A1")

Cadence

16 Days

Tags

16-day

aqua

evi

global

modis

myd13a1

ndvi

vegetation

vegetation-indices

Description

Global MODIS vegetation indices are designed to provide consistent spatial and temporal comparisons of vegetation conditions. Blue, red, and near-infrared reflectances, centered at 469-nanometers, 645-nanometers, and 858-nanometers, respectively, are used to determine the MODIS daily vegetation indices.

The MODIS Normalized Difference Vegetation Index (NDVI) complements NOAA's Advanced Very High Resolution Radiometer (AVHRR) NDVI products provide continuity for time series historical applications. MODIS also includes a new 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.

Global MYD13A1 data are provided every 16 days at 500-meter spatial resolution as a gridded level-3 product in the Sinusoidal projection. Vegetation indices are used for global monitoring of vegetation conditions and are used in products displaying land cover and land cover changes. These data may be used as input for modeling global biogeochemical and hydrologic processes and global and regional climate. These data also may be used for characterizing land surface biophysical properties and processes, including primary production and land cover conversion.

Version-5 MODIS Vegetation Indices products have attained Validation Stage 3.

Vegetation Indices production is phased between Terra and Aqua acquisitions, with Terra beginning on Day 001 and Aqua beginning on Day 008.

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

Bands

Bands

Pixel size: 500 meters (all bands)

Name	Units	Min	Max	Scale	Pixel Size	Wavelength	Description
NDVI		-2000	10000	0.0001	500 meters	None	Normalized Difference Vegetation Index
EVI		-2000	10000	0.0001	500 meters	None	Enhanced Vegetation Index
DetailedQA					500 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		0	10000	0.0001	500 meters	645nm	Red surface reflectance
sur_refl_b02		0	10000	0.0001	500 meters	858nm	NIR surface reflectance
sur_refl_b03		0	10000	0.0001	500 meters	469nm	Blue surface reflectance
sur_refl_b07		0	10000	0.0001	500 meters	2130nm/2105 - 2155nm	MIR surface reflectance
ViewZenith	deg	0	18000	0.01	500 meters	None	View zenith angle
SolarZenith	deg	0	18000	0.01	500 meters	None	Solar zenith angle
RelativeAzimuth	deg	-18000	18000	0.01	500 meters	None	Relative azimuth angle
DayOfYear		1	366		500 meters	None	Julian day of year
SummaryQA					500 meters	None	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.

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('MODIS/MYD13A1')
                  .filter(ee.Filter.date('2014-04-01', '2014-06-01'));
var ndvi = dataset.select('NDVI');
var ndviVis = {
  palette: [
    'ffffff', 'ce7e45', 'df923d', 'f1b555', 'fcd163', '99b718', '74a901',
    '66a000', '529400', '3e8601', '207401', '056201', '004c00', '023b01',
    '012e01', '011d01', '011301'
  ],
};
Map.setCenter(-7.03, 31.05, 2);
Map.addLayer(ndvi, ndviVis, 'NDVI');

Open in Code Editor

MYD13A1.005 Vegetation Indices 16-Day L3 Global 500m [deprecated]

Global MODIS vegetation indices are designed to provide consistent spatial and temporal comparisons of vegetation conditions. Blue, red, and near-infrared reflectances, centered at 469-nanometers, 645-nanometers, and 858-nanometers, respectively, are used to determine the MODIS daily vegetation indices. The MODIS Normalized Difference Vegetation Index (NDVI) complements NOAA's Advanced Very High Resolution …

MODIS/MYD13A1, 16-day,aqua,evi,global,modis,ndvi,vegetation,vegetation-indices

2002-07-04T00:00:00Z/2017-03-14T00:00:00Z

-90 -180 90 180

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