What is spectral signature? Describe the spectral signature of vegetation and the factors influencing it. Support your answer with neat well labelled diagrams, wherever required.

Understanding Spectral Signature in Remote Sensing

Spectral signature refers to the unique pattern of electromagnetic energy reflected or emitted by a surface or object across different wavelengths. In remote sensing, this signature is crucial for identifying and characterizing various features on the Earth's surface, such as vegetation, water bodies, urban areas, etc. The spectral signature is typically depicted as a graph showing reflectance or radiance against different wavelengths.

Spectral Signature of Vegetation:

The spectral signature of vegetation exhibits distinct patterns across different wavelengths due to its biochemical composition and structural characteristics. Generally, vegetation exhibits high reflectance in the near-infrared (NIR) region and low reflectance in the visible ____ _______ _______ ____ ______ _________.
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