Earth Engine incorporates quite a lot of Landsat specific processing methods. Particularly, there are methods to compute at-sensor radiance, high-of-environment (TOA) reflectance, surface reflectance (SR), cloud score and cloud-free composites.
Beach ridges are moderately undulating terrain features of marine depositional kind, shaped throughout pliestocene to current age, within the plains of the study space. They are low, primarily steady seaside or seashore dune materials (sand, gravel and shingle) heaped up by the motion of wave and currents on the backshore of a seaside past the current limit of storm waves or the attain of ordinary tides, and occurring as a single or as one in all a sequence of approximately parallel deposits (Chockalingam 1993). The beach ridges have been recognized as representing successive nonetheless-stand place of sea of an advancing shoreline from satellite imagery. Beach ridges of Tuticorin are highly reworked.
Visible light is just one form of electromagnetic radiation that satellites can monitor. Infrared and radar are also part of the electromagnetic spectrum, and each represents radiation in a special wavelength. For example, yellow mild has a longer wavelength than blue, and pink is longer than yellow. Infrared and radar wavelengths are longer still. By amassing data in numerous areas of the spectrum, satellites can reveal info that will go undetected by our eyes alone.
For instance, the next photos illustrate three charts of different spectral signatures (water, vegetation, and bare soil) calculated with the original image (DN), the TOA reflectance image and the DOS1 corrected reflectance image. As you can see, the DOS1 correction modifies the reflectance values, especially within the blue band. Discover that the band number in the following photos is the numerical order of used bands, thus for example: band 1 of the chart is band 2 of Landsat 8 (i.e. blue band).
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