Google Earth Engine ——MOD17A3HGF.006: MOD17A3HGF V6产品提供500米像素分辨率的年度净初级生产力（NPP）Yearly Global 500m

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发布于 2024-02-02 10:43:02

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The MOD17A3HGF V6 product provides information about annual Net Primary Productivity (NPP) at 500m pixel resolution. Annual NPP is derived from the sum of all 8-day Net Photosynthesis (PSN) products (MOD17A2H) from the given year. The PSN value is the difference of the Gross Primary Productivity (GPP) and the Maintenance Respiration (MR) (GPP-MR).

MOD17A3HGF V6产品提供500米像素分辨率的年度净初级生产力（NPP）信息。年度净初级生产力是由给定年份的所有8天净光合作用（PSN）产品（MOD17A2H）之和得出的。PSN值是总初级生产力（GPP）和维持呼吸（MR）之差（GPP-MR）。

Dataset Availability

2001-01-01T00:00:00 - 2020-01-01T00:00:00

Dataset Provider

NASA LP DAAC at the USGS EROS Center

Collection Snippet

ee.ImageCollection("MODIS/006/MOD17A3HGF")

Resolution

500 meters

Bands Table

Name	Description	Min	Max	Units	Scale
Npp	Net primary productivity	-30000	32700	kg*C/m^2	0.0001
Npp_QC	Quality control percentage	0	100	%	0

使用说明：

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

数据引用：

LP DAAC - MOD17A3HGF

代码：

var dataset = ee.ImageCollection('MODIS/006/MOD17A3HGF')
                  .filter(ee.Filter.date('2014-01-01', '2015-05-01'));
var npp = dataset.select('Npp');
var nppVis = {
  min: 0.0,
  max: 19000.0,
  palette: ['bbe029', '0a9501', '074b03'],
};
Map.setCenter(6.746, 46.529, 2);
Map.addLayer(npp, nppVis, 'NPP');