(Online Course) Contemporary Issues for IAS Mains 2012: Yojana Magazine – Geospatial Techniques and Methods

Yojana Magazine

Entertainment Industry  – Geospatial Techniques and Methods

Q. Write a short notes on Geospatial Techniques in Disaster

Answer: The geospatial technologies have an important
role in developing strategies for disaster reduction as well managing the
disasters. It can be broadly classified into remote sensing based technologies
and Geographical Information System (GIS). The remote sensing can be either
space or aerial based.

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The space born remote sensing technology, that is satellite
remote sensing, is more apt for disaster management owing to its temporal

The Earth observation satellites provide synoptic and
temporal coverage of large areas in near real time. The repetitive images enable
the continuous monitoring of Earth surface features and phenomena. It
facilitates the detection and early warning of disasters, especially those of
meteorological origin. Besides, the different spatial resolutions of the
satellite images enable us to choose images according to the area coverage of
disaster prone areas. The forest fires can be detected early and their spread
can be monitored. The images enable the mapping of flood affected areas and also
track the direction of movement of tropical cyclones.The satellite images
also assist in mapping the drought and flood stricken areas and forest fire
affected areas. The magnitude of the drought and flood can be assessed using the
temporal images of the affected area.

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