Question

What is change detection? Describe various classification based methods of change detection.

19 Jan 2026
Answer :
Word Count : 482
Change detection in remote sensing refers to the process of identifying differences in the state of an object or phenomenon by observing it at different times. It is a critical technique used in environmental monitoring, urban planning, agriculture, forestry, and disaster management. The primary goal of change detection is to quantify, locate, and analyze the changes that occur over time in the Earth's surface by comparing multi-temporal satellite or aerial images. These changes can be natural, such as vegetation growth, soil erosion, or water level fluctuations, or anthropogenic, such as urban expansion, deforestation, and land use _______ ____ _____ _______ _____ ________.
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