MYD13C1.061: Aqua Vegetation Indices 16-Day L3 Global 0.05 Deg CMG

Dataset Availability

2002-07-04T00:00:00Z–2024-11-24T00:00:00Z

Dataset Provider

NASA LP DAAC at the USGS EROS Center

Earth Engine Snippet

ee.ImageCollection("MODIS/061/MYD13C1")

Cadence

16 Days

Tags

16-day aqua global nasa usgs vegetation

Description

The Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) Vegetation Indices 16-Day (MYD13C1) Version 6.1 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 maintains continuity with 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), which has improved sensitivity over high biomass regions. The Climate Modeling Grid (CMG) consists of 3,600 rows and 7,200 columns of 5,600 meter (m) pixels. Global MYD13C1 data are cloud-free spatial composites of the gridded 16-day 1 kilometer MYD13A2 data, and are provided as a Level 3 product projected on a 0.05 degree (5,600 m) geographic CMG. The MYD13C1 has data fields for NDVI, EVI, VI QA, reflectance data, angular information, and spatial statistics such as mean, standard deviation, and number of used input pixels at the 0.05 degree CMG resolution.

Bands

Resolution
5600 meters

Bands

Name	Units	Min	Max	Wavelength	Description
NDVI		-0.2	1		16-day NDVI average
EVI		-0.2	1		16-day EVI average
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	1	620-670nm	Surface reflectance band 1 (red)
sur_refl_b02		0	1	841-876nm	Surface reflectance band 2 (near-infrared)
sur_refl_b03		0	1	459-479nm	Surface reflectance band 3 (blue)
sur_refl_b07		0	1	2105-2155nm	Surface reflectance band 7 (mid-infrared)
SolarZenith	deg	0	180		View zenith angle of VI Pixel
NDVIStdDev		-0.2	1		Standard deviation computed from input NDVI pixels
EVIStdDev		-0.2	1		Standard deviation computed from input NDVI pixels
Pixel_1km	count	0	36		Number of 1 km input pixels used
Pixel_30deg_1km	count	0	36		Number of 1 km input pixels used with VZ angle less than + or - 30 degs
SummaryQA					Quality reliability of VI pixel

SummaryQA Class Table

Value	Color	Description
0		Good Data: use with confidence
1		Marginal Data: useful, but look at other QA information
2		Snow/Ice: target covered with snow/ice
3		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

Citations:

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

DOIs

• https://doi.org/10.5067/MODIS/MYD13C1.061

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('MODIS/061/MYD13C1')
                  .filter(ee.Filter.date('2023-01-01', '2023-05-01'));
var ndvi = dataset.select('NDVI');
var ndviVis = {
  min: 0,
  max: .9,
  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

MYD13C1.061: Aqua Vegetation Indices 16-Day L3 Global 0.05 Deg CMG

The Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) Vegetation Indices 16-Day (MYD13C1) Version 6.1 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 maintains continuity with the existing National Oceanic and Atmospheric …

MODIS/061/MYD13C1, 16-day,aqua,global,nasa,usgs,vegetation

2002-07-04T00:00:00Z/2024-11-24T00:00:00Z

Google Earth Engine

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

• https://doi.org/10.5067/MODIS/MYD13C1.061