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India Revises Coastline Length to 11,098.8 km Using Advanced Mapping

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India Revises Coastline Length to 11,098.8 km Using Advanced Mapping

AspectDetails
EventRevision of India's coastline length
Announced byMinistry of Home Affairs (MoHA) in the 2023-24 Annual Report
Old Coastline Length7,516.6 km
New Coastline Length11,098.8 km (nearly 50% increase)
Reason for RevisionEnhanced mapping technologies, no territorial expansion
Measurement AgenciesSurvey of India and National Hydrographic Office (NHO)
New MethodologyHigh-resolution digital tools: GIS, Satellite altimetry, LIDAR-GPS, Drones
Base Scale1:250,000 (earlier 1:4,500,000)
Reference LineHigh Water Line (HWL) from 2011 electronic navigation charts
Review FrequencyEvery 10 years using advanced mapping tools
ImplicationsMaritime security, Exclusive Economic Zones (EEZs), Disaster management, Climate modelling, Textbook updates
Coastal States/UTs11 coastal States and 2 Union Territories (Andaman & Nicobar, Lakshadweep)
Last Coastal StateGoa (1961)
Coastline ParadoxConcept by Lewis Fry Richardson, expanded by Benoit Mandelbrot

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