Describe spectral signatures of soils, minerals and rocks and the factors influencing it. Support your answer with neat well labelled diagrams, wherever required.

Spectral signatures are the unique patterns of reflectance or emittance of electromagnetic radiation by objects on the Earth's surface, which can be detected by remote sensing instruments. These signatures are primarily influenced by the material's composition, structure, moisture content, and surface roughness. In the context of remote sensing, soils, minerals, and rocks exhibit distinct spectral signatures, which can be used to identify and study their properties.

### Spectral Signatures of Soils

Soil spectral signatures are influenced by the mineral composition, organic content, moisture content, and surface roughness. In general, soils tend to have relatively broad, featureless spectra in the visible to near-infrared (VNIR) region. The reflectance of soils decreases as the wavelength increases in this region, with soil properties affecting the degree of reflectance.

- Composition: The mineral content of soil significantly affects its reflectance. Clay-rich soils tend to have lower reflectance in the visible region compared to sandy ________ _____ _____ ___ ___ ______ ____ ______.
_________ __________ ___ ____ _________ ________ ________ _____ ___ __________ _______.
__________ ______ _____ ____ __________ __________ _________ _________ _________ ________ ___ _____.
_____ _______ ______ ______ _________ _____ ___ __________ _________.
___ _______ __________ __________ _____ _____ _________ _________.
_____ ________ ____ _____ _____ _____.
__________ ____ ____ ___ _____ ________.
________ __________ ____ ______ ______ _____ ____ ___ ____.
___ ___ _______ _____ _____ _________ ______ ________ _________.
_________ ________ _____ _________ ________ _________ _____ _____ __________.
________ _________ ____ ______ ___ _______ __________ _______ _____ _______ ______ ________.
__________ __________ ______ ________ ____ _______ _____ ______ _________ _____ _____ __________.
____ __________ __________ _________ _____ ____ _______ _______ __________ _____ ________ _______.
_________ ________ _______ _______ ___ ___ _______ ____.
__________ ________ _______ __________ ____ _______.
_____ _______ _________ ___ ______ _______ _______ ___ ___ ____ ____ ___.
__________ ___ ___ ____ _____ _____ _____ ______ __________ ________ ___ ______.
____ _______ _____ _______ ____ ____ __________.
___ ______ __________ ________ ________ _______ _________ _____.
_____ ___ ________ ________ ____ ___ ___ _______ ______ ____.
__________ ______ ______ ____ _______ _______ _____ _____ ___ _________.
______ ______ _________ _________ _____ ________ ______ ____.
_______ __________ ______ _________ __________ ___ ______ __________ _______ ___.
_______ _______ _______ ________ _______.
_______ _____ _________ ___ ______ ___ ____ ______ ____ ______.
_____ ____ ___ ____ _____ __________ ____ ____.
___ ______ _________ _______ ___ ___ __________ ______ ______ __________.
________ ____ _______ ______ _______ _______ _______ _______.
_______ ____ _______ ____ ________ ___ _____ ________ __________ _______ ________ _________.
________ ________ ____ ______ _______ __________.
_________ ____ _________ _______ ____ ____ ________.
_________ _____ _______ _________ ______ _______.
_______ ________ _________ ___ _____ _______.
______ _______ ___ ___ __________ _________ __________ __________ ____ _____.
___ ______ _____ ___ _____ ________ ______ _________ _____ ___ ____ ____.
___ ________ _______ ________ __________ _______ ____ _______ _____.
_________ _______ ___ ____ _____ ______ ____ ___ _________ ____ ______ ____.
______ ________ _____ __________ _____ ______ __________ ________ ____ _______ _________.
______ ________ __________ _____ _________ _________ _______ __________ __________ ______ __________.
_________ _______ _____ __________ ________ _______ ____.
___ ___ ______ _______ ___ ___ _____ ___ ___ ________.
__________ __________ ___ ____ ___ __________ ____ _________ ______ ___.
_____ ___ ________ ________ _______ __________ ____.
__________ _______ _________ ___ ________ _______ _________ _______.
____ ______ ___ _________ ____ ________ _____ ___ ______.
_____ ____ _________ _____ ___ ___ _______ __________ ________ __________ ____.
___ _____ ______ _______ _______ _______ ___.
_________ _______ ______ __________ ________.
______ ________ _____ ___ _________ __________.
________ ___ _______ _________ ________ _____ ____.
___ _________ ____ _____ _______ _____ _________ _______ _______.
_____ ____ _________ ____ _________ _______ _____ ________.
________ ______ _________ ____ ___ ______.
_____ __________ ____ ___ __________ _________ ___ ___ _________.
__________ _________ _________ ____ ______ _______ ________ ____ __________ _____ ___.
_________ _______ ___ _____ ____.
___ __________ _____ ___ _________ ________ ______ _____.
________ __________ _______ _______ ___ __________ ____ __________ ______ ____.
________ ________ ___ _________ __________ ________ _____ ____ _______.
___ _______ _______ _________ _________ __________ ____ _____ _________ ______ __________.
________ ___ _________ ________ __________ _______ __________ ______ ______ __________.
___ __________ ____ ___ ______ ___.
__________ _________ _______ _______ _________ ______ ________.
_____ _________ __________ ______ _________.
_______ ________ __________ __________ _______ _______ ______ _________.
__________ _______ _____ _______ ______ ___ ___ __________ ________ ____ ________.
____ _________ _____ ____ ____ ______ _______ _______.
______ ________ _____ _________ ___ _____ ____ _________ _________.
_________ _______ ____ _____ ________ __________ __________ ___ _____ ________ ___.
____ _________ ___ ___ _______ ________ ________.
___ _________ _________ ______ ______ ________ _____ _________ _________ _____ ___ ______.
__________ ____ ________ ______ ___ _________ ______ ______.
_________ _____ _________ ______ _____ _______.
_______ _________ _________ ______ __________ _____ ___ ___ ____ _______ _____ _____.
_________ ________ ___ _____ ____ ____ ______ _______ ____ _______ ___ ______.
______ _____ ______ _____ _________ ___ __________ __________ ___ ____ ____ __________.
____ ____ _______ ___ _____ ________ ___ ________ ____.
__________ _____ _________ _______ __________ ______ ______ _____ ______ ________ _____ __________.
___ _______ _______ _______ __________ ______ ___ _______.
_______ ___ ____ _______ ________ ___.
___ ______ _____ _________ ___ ___ _______ ____ _______ ____ _____ _____.
____ ___ _______ _______ ________ __________ ______ ____ _________ ________ __________ ______.
__________ ____ ____ ___ ____ _______ ________.
_______ ___ _______ ____ ___ ____ ______ ___ _____ ___.
Get Full Answer on WhatsApp