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Google Earth EngineでNO2

Last updated at Posted at 2020-08-25

概要

Google Earth EngineでNO2、やって見た。
covid-19のロックダウンでNO2が減ったか、5月の第一週を去年と比較表示。

参考にしたページ

写真

image.png

サンプルコード

var collection = ee.ImageCollection('COPERNICUS/S5P/NRTI/L3_NO2').select('NO2_column_number_density');
var collection_2019 = collection.filterDate('2019-05-01', '2019-05-07').mean();
var collection_2020 = collection.filterDate('2020-05-01', '2020-05-07').mean();
var band_viz = {
  min: 0,
  max: 0.0002,
  palette: ['black', 'blue', 'purple', 'cyan', 'green', 'yellow', 'red'],
  opacity: 0.5
};
//Map.addLayer(collection_2019, band_viz, 'S5P N02 2019');
//Map.addLayer(collection_2020, band_viz, 'S5P N02 2020');
Map.setCenter(137, 36, 5);
var diff = collection_2019.subtract(collection_2020);
Map.addLayer(diff, band_viz, 'diff no2');


以上。

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