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| LISS III image Baitarni Estuary, Odisha |
The LISS III satellite image is acquired from Bhuvan portal by National Remote Sensing Centre, ISRO, Government of India, Hyderabad, India.
Decoding the Satellite image -
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| Google Earth Image of Baitarni Estuary, Odisha |
The LISS III image is taken on February 2018. As you can see, it is not a natural colour image. A natural colour image of the same region will not have much brighter colours, like the Google Earth image given here. The hues of the features have the same shades as it is present in the nature. However, it is somewhat difficult to distinguish the features as all the colours merge into each other.
The colourful image i.e. the LISS III satellite image is a false colour composite (FCC). The regular RGB bands are not used in a FCC image, instead other band images are taken. In the FCC image here Red, Green and Infra-red band has been used. The FCC image highlights the features with bright shades which reveal lots of information. LISS III is a multi-spectral sensor employed in ISRO's Resourcesat satellites which capture images in visible and infra-red bands.
In this LISS III image, many distinguishable features in bright shades are visible. One can easily distinguish between the triangular landmass and surrounding water feature in the region by the tone and texture of the features. Another distinguishable feature here is the curvy, meandering bright blue Baitarni river dissecting the landmass. The dissimilar shades of blue in different section is due to presence of suspended particles and sediment brought by the river. As it falls into the Bay of Bengal, the extent of the suspended sediments is clearly visible in different shades of the sea.
Kanika sand island is visible in the Bay of Bengal as bright red patch, east of the main landmass. It is a densely vegetated mangrove forest confirmed by the bright red shade in the FCC. In the mainland, two major and many minor bright red patches are also discernible. The patches are in dissimilar shade/tone of red owing to type, health, and density of vegetation in the region. The two major patches are forested part of the Bhitarkanika national park and wildlife sanctuary. In the northern part of the mainland, cyan/turquiose toned small sized specks of land along the river are the settlements.
