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Spectral signatures refer to the specific way in which different materials reflect, absorb, and emit electromagnetic radiation across various wavelengths. Each type of earth surface feature, such as water bodies, vegetation, soil, snow, and urban areas, exhibits a unique spectral response that can be measured using remote sensing instruments. Water, for instance, strongly absorbs in the near-infrared region but reflects in the visible ____ _______ ____ ___ ____ ___ ______ __________ __________ __________.
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