NOAA CDR AVHRR NDVI: Normalized Difference Vegetation Index, Version 4

NOAA/CDR/AVHRR/NDVI/V4
Dataset Availability
1981-06-24T00:00:00 - Present
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("NOAA/CDR/AVHRR/NDVI/V4")
Tags
land daily ndvi noaa cdr avhrr

Description

The NOAA Climate Data Record (CDR) of AVHRR Normalized Difference Vegetation Index (NDVI) contains gridded daily NDVI derived from the NOAA AVHRR Surface Reflectance product. It provides a measurement of surface vegetation coverage activity, gridded at a resolution of 0.05° and computed globally over land surfaces.

Known issues with this dataset include:

  • TIMEOFDAY variable contains values that are too large by 1 day
  • Latitude values are not correctly associated with the center of the grid cell, error is < 0.002 degrees
  • Longitude values are not correctly associated with the center of the grid cell, error is < 0.02 degrees
See technical note from the data provider.

Bands

Resolution
0.05 arc degrees

Bands

Name Units Min Max Scale Description
NDVI -9998* 9998* 0.0001

Normalized difference vegetation index

TIMEOFDAY hours 0* 2400* 0.01

Hours since start of day

QA

Quality control bit flags

* estimated min or max value

Image Properties

Image Properties

Name Type Description
status STRING

'provisional' or 'permanent'

Terms of Use

Terms of Use

The NOAA CDR Program’s official distribution point for CDRs is NOAA’s National Climatic Data Center which provides sustained, open access and active data management of the CDR packages and related information in keeping with the United States’ open data policies and practices as described in the President's Memorandum on "Open Data Policy" and pursuant to the Executive Order of May 9, 2013, "Making Open and Machine Readable the New Default for Government Information". In line with these policies, the CDR data sets are nonproprietary, publicly available, and no restrictions are placed upon their use. For more information, see the Fair Use of NOAA's CDR Data Sets, Algorithms and Documentation pdf.

Citations

Citations:
  • Eric Vermote, Chris Justice, Ivan Csiszar, Jeff Eidenshink, Ranga Myneni, Frederic Baret, Ed Masuoka, Robert Wolfe, Martin Claverie and NOAA CDR Program (2014): NOAA Climate Data Record (CDR) of Normalized Difference Vegetation Index (NDVI), Version 4. [indicate subset used]. NOAA National Climatic Data Center. doi:10.7289/V5PZ56R6

DOI(s)

Explore in Earth Engine

var dataset = ee.ImageCollection('NOAA/CDR/AVHRR/NDVI/V4')
                  .filter(ee.Filter.date('2018-05-01', '2018-06-01'));
var ndvi = dataset.select('NDVI');
var ndviVis = {
  min: -1000.0,
  max: 5000.0,
  palette: [
    'ffffff', 'ce7e45', 'fcd163', 'c6ca02', '22cc04', '99b718', '207401',
    '012e01'
  ],
};
Map.setCenter(7.71, 17.93, 2);
Map.addLayer(ndvi, ndviVis, 'NDVI');

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