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In the first-of-its-kind comprehensive exercise, the central government has surveyed 17.78 lakh acres of defence land using the latest technologies such as drone and satellite imagery.
The mammoth exercise of surveying about 1.61 lakh acres of defence land inside cantonments and 16.17 lakh acres outside cantonments was started in October 2018 and is now complete, the defence ministry said.
This is the first time after independence, entire defence land has been surveyed using the latest survey technology and in a large number of pockets in association with the Revenue authorities of several state governments, the Defence ministry said.
This came after 9622.807 acres of defence land was reported to be encroached in the country.
“Clear demarcation and boundary survey of defence lands and fixing of the boundaries is necessary for protection of the defence land, safeguarding of the title of Ministry of Defence , updation of land records, maps and prevention of encroachments,” the Ministry of Defence said in a statement.
The defence ministry said, as per records maintained by Defence Estates Offices, the Ministry of Defence owns large tracts of land about 17.99 lakh acres out of which approximately 1.61 lakh acres is situated within the 62 notified Cantonments. About 16.38 lakh acres is spread across many pockets outside the Cantonments. Out of 16.38 lakh acres land, about 18,000 acres is either state hired land or is proposed for deletion from records on account of transfer to other government departments.
According to the Defence Ministry, the magnitude of land holding, location of land in approximately 4,900 pockets across the country, inaccessible terrain in many places and association of various stakeholders makes this survey one of the largest land surveys in the country.
“Modern survey technologies like Electronic Total Station (ETS) and Differential Global Positioning System (DGPS) were used in the survey. To further speed up the process, Drone imagery and satellite imagery-based surveys were leveraged for reliable, robust and time-bound outcomes,” the Defence Ministry statement said.
“3D Modelling techniques for better visualisation of defence land in hilly area have also been introduced by utilising Digital Elevation Model (DEM) in association with Bhabha Atomic Research Centre (BARC).”
The defence ministry said the mammoth exercise of survey of nearly 18 lakh acres of defence land spread pan India, which hitherto rested on the fulcrum of herculean human efforts, is a unique example of leveraging emerging technologies for land survey in a short time in line with the Central Govt’s emphasis on Digital India. The fact that such an exercise has been conducted after 75 years of Independence, also makes it a part of celebrations under the ‘AZADI KA AMRUT MAHOTSAV’.
As a part of the survey, a project for a real time change detection system based on the Time series-Satellite imagery for detection of encroachments on defence land has also been initiated. Pilot tests have been carried out on satellite imagery of defence land pockets procured from National Remote Sensing Centre, Hyderabad.
Geo-referenced and digitised shape files are made available to enable quick decision making by officials of DGDE & MoD. Association of Revenue officials in survey will eventually help in reducing boundary disputes amongst stakeholders and would also help in resolving legal disputes at various levels.
Completion of such a humongous survey has been made possible due to the capacity building of technical personnel and officers of Defence Estates Organisation on the latest technologies for land surveys over the years in association with premier institutes like the National Remote Sensing Centre and the National Institute for Geo-Informatics Science and Technology.
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