Data that comes from field visits conducted during surveys may provide different information each time a study is conducted, and can prove helpful only if data from all studies are integrated, said Surveyor-General of India Swarna Subba Rao.
At a Geographic Inform-ation System (GIS) Day workshop held on the occasion of World GIS Day, Mr. Rao said Hyderabad’s map would soon be released.
“It will be out, after two decades, in mid-Decem-ber,” he said, adding that a mapping of all urban areas was the simplest solution for better management.
“GIS mapping will also make it very easy to find out illegal settlements in urban areas. Nowadays, there is also a lot of dem-and for digital maps in the GIS format,” he observed.
Former Director of the Survey of India G.S. Kumar said GIS, now popular as geospatial technologies, includes satellite images, GPS, digital maps, photogr-ammetry, cartography, land surveying and also Lidar (laser).
Mr. Kumar pointed out that 3D mapping in Delhi was completed recently using Lidar technology. “In the past it used to take months to capture and process 3D data of any area, but with Lidar it takes a only few days,” he said.
