Within the Copernicus program, the European Space Agency (ESA) makes satellite data from the Sentinel missions available free of charge. The LGV prepares the data quarterly for easier use. Originally, the satellite data can be obtained via the national platform CODE-DE (Copernicus Data and Exploitation Platform – Germany). Data basis: - Sentinel-2 L2A: Multispectral, atmospherically corrected data - Georeferenced mosaic - Tile count: 25 - Tile size: 8 km x 8 km - Tile selection: recency and degree of cloud cover - Color representation: RGB, CIR, NDVI - Ground resolution: 10m - Color depth: 8 bit RGB (Red Green Blue): The band combination of red (B4), green (B3) and blue (B2) emulates human color perception. Healthy vegetation is shown in green, urban areas are shown in white / gray and water areas are shown in blue, depending on the turbidity. CIR (Color Infrared): The band combination of near infrared (B8), red (B4) and green (B3) highlights vegetation. Due to the chlorophyll content of the plants, this reflects particularly strongly in the near infrared range and is displayed reddish. Urban areas appear cyan-blue / gray and water areas dark blue. NDVI (Normalized Difference Vegetation Index): The NDVI is a frequently used index, which is used to assess vegetation. It is calculated from the near infrared (B8) and red (B4) bands: NDVI = (NIR-Red)/(NIR+Red) [© Contains modified Copernicus Sentinel data [2018-2021], processed on CODE-DE]
