- Dataset Availability
- 2000-01-01T00:00:00Z–2014-01-01T00:00:00
- Dataset Provider
- NASA LP DAAC at the USGS EROS Center
- Earth Engine Snippet
-
ee.ImageCollection("MODIS/055/MOD17A3") - Tags
Description
The MOD17A3 V055 product provides information about annual Gross and Net Primary Productivity (NPP) at 1km pixel resolution. Net Primary Productivity (NPP) defines the rate at which all plants in an ecosystem produce net useful chemical energy. In other words, NPP is equal to the difference between the rate at which plants in an ecosystem produce useful chemical energy (or GPP), and the rate at which they expend some of that energy for respiration.
The version 055 of the NPP product is produced by the Numerical Terradynamic Simulation Group (NTSG), University of Montana (UMT). It corrects the problem with cloud-contaminated MODIS LAI-FPAR inputs to the MOD17 algorithm. The original, uncorrected datasets constitute the version 4 NPP products. For further details regarding the differences between the NTSG and NASA versions of this product, please consult this document
Bands
Resolution
1000 meters
Bands
| Name | Units | Min | Max | Scale | Description |
|---|---|---|---|---|---|
Gpp |
kg*C/m^2 | 0 | 65500 | 0.0001 | Annual gross primary productivity |
Npp |
kg*C/m^2 | 0 | 65500 | 0.0001 | Annual net primary productivity |
Gpp_Npp_QC |
% | 0 | 100 | Percentage of filled MOD15 LAI caused by cloud-contamination during a growing season (defined when daily minimum air temperatures are above -8°) in a year. A high value indicates a high frequency of cloud-contamination. For example, QA is high for tropical rainforests but low in arid areas. |
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
Please visit LP DAAC 'Citing Our Data' page for information on citing LP DAAC datasets.
Explore with Earth Engine
Code Editor (JavaScript)
var dataset = ee.ImageCollection('MODIS/055/MOD17A3')
.filter(ee.Filter.date('2014-01-01', '2014-05-01'));
var npp = dataset.select('Npp');
var nppVis = {
min: 0,
max: 18000,
palette: ['bbe029', '0a9501', '074b03'],
};
Map.setCenter(6.746, 46.529, 3);
Map.addLayer(npp, nppVis, 'NPP');