India’s Coastline Measurement
India’s coastline has undergone a remarkable transformation in recent years. The length has increased by nearly 50% due to advanced measurement techniques. This change is for administrative and strategic purposes. However, the actual ground situation remains unchanged.
Recent Developments in Coastline Measurement
The coastline length was previously estimated at 7,516 km based on 1970s data. Recent measurements reveal a new length of 11,098 km, an increase of 3,582 km. This change stems from using high-resolution data, which captures the coastline’s intricate details better than older methods.
Advancements in Measurement Techniques
Older measurements relied on a scale of 1:4,500,000, which smoothed out many irregularities. Modern techniques use a scale of 1:250,000, allowing for more precise mapping. The transition from manual calculations to Geographic Information System (GIS) software has enhanced accuracy .
The Coastline Paradox
The increase in coastline length marks the coastline paradox. This theory states that the length of a coastline is not fixed. It varies based on the measurement scale. As technology improves, future assessments may yield even longer coastline lengths. This paradox applies to other natural features like rivers and mountain ranges.
Reassessment of Offshore Islands
India’s offshore islands have also been reassessed. A 2016 survey identified 1,382 offshore islands. However, discrepancies in counts from various agencies led to a standardised number of 1,298 offshore islands and 91 inshore islands. The total now stands at 1,389, excluding river islands.
Implications of New Measurements
While the changes in coastline length and island count are largely academic, they hold implications. Enhanced understanding of India’s territory aids in administrative, developmental, and security planning. The new measurements may also influence Coastal Zone Regulations and efforts to combat coastal erosion.
Future Monitoring and Reassessment
Regular reassessment of coastlines is essential due to natural processes and human activities. India has mandated these exercises every ten years. Other nations also engage in similar practices to stay updated on coastal changes.
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