But unlike other bands, it captures a much wider range of light, allowing it to be significantly sharper. By itself, the panchromatic band would look somewhat uninteresting like other individual bands, it appears black and white. The spectral bands of Landsat 7 and 8 have a resolution of 30 meters per pixel, while the panchromatic band has a resolution of 15 meters per pixel. Panchromatic sharpening (pan-sharpening) is a technique that combines the high-resolution detail from a panchromatic band with the lower-resolution color information of other bands (usually only the visible bands). It also enables us to combine these bands in order to see the unseen, make important calculations, or assemble just the data from visible light to produce a natural-color image.īut there’s another great feature of the different bands in Landsat 7 and 8 data: one of them can be used to effectively double the resolution of your image. This allows for multispectral imagery that goes beyond the visible light our eyes can see. The sensors onboard Landsat capture imagery in several different “ bands.” Each band represents a unique chunk of the electromagnetic spectrum, defined by wavelength. But Landsat is quite different from the camera in your mobile phone or dSLR. It’s almost like having your own camera in orbit, 700 kilometers (430 miles) above the Earth. A true-color Landsat 8 image of Mount Jefferson, Oregon, at a resolution of 15 meters per pixel.
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