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Sentinel Copernicus 2 "space exploration earth" series: Rhine River, Germany

2022-05-08 02:05:03Chinese industry information station

The black Rhine River can be seen in the image , From the Swiss Alps to the North Sea , Through Switzerland 、 Liechtenstein 、 Austria 、 The French 、 Germany and the Netherlands . In the picture , The Rhine flows from the lower right to the upper left . The river is an important waterway , There is abundant shipping traffic , Transporting import and export goods from all over the world .

Bonn is North Rhine, Germany - A city on the Rhine in Westphalia . Bonn is located about... South southeast of Cologne 24 km (15 miles ) It's about , Located in Rhine, the largest metropolitan area in Germany - The southernmost end of Ruhr district . It is a university city , Also Ludwig - all - Beethoven's birthplace .

The picturesque Rhine Valley has many forest covered hills , There is a castle on it , Including vineyards 、 Ancient towns and villages along the river . A special section from Bingen in the south to Koblenz is called the Rhine Valley , It has been declared a UNESCO World Heritage site ( invisible ), The city of Cologne is visible at the top of the picture .

This is a composite image of the sentry 2 Three independent normalized vegetation indices for mission (NDVI) Composed of layers . Normalized vegetation index is widely used in remote sensing , Because it provides scientists with an accurate way to measure the health and state of plant growth .

Each color in this week's image represents 2018 - 2021 The average of the whole season of the year NDVI value . The hue of red describes 4 The month and 5 The peak of vegetation growth in August , Green shows 6 The month and 7 Monthly changes , And blue shows 8 The month and 9 Monthly changes .

Cologne is one of the oldest cities in Germany . It is the largest city on the Rhine , It's also the Rhine - The most populous cities in the Ruhr metropolitan area and Rhine region . It is the fourth most populous city in Germany , It is also the most populous North Rhine in Germany - Westphalia (NRW) The largest city in .

Colored squares , Especially visible on the left side of the image , Shows different crop types . The nearby white area is forest , They look white because they maintain a high... During most growing seasons NDVI value , This is different from crops , Crops are planted and harvested within a specified time . The light pink area is grass , And dark areas (NDVI Lower values ) It's a building area and a water body .

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