‘Bhuvan,’ the new web-based 3D mapping tool uses images taken over a year ago by ISRO’s seven remote sensing satellites, including Cartosat-1 and Cartosat-2. The satellites can capture images of objects as small as a car on a road. This would provide a sharper picture of Indian terrain barring sensitive locations such as military and nuclear installations.
The degree of resolution showcased is based on the level of popularity of a place or an area. Most of the terrain is covered up to a resolution of at least six metres. The least spatial resolution is 55 metres.
Like Google Earth, the geo-portal, http://bhuvan.nrsc.gov.in, allows users to view cities and other places of interest looking perpendicularly down or at an oblique angle, with different perspectives. The site, among other things, offers tools to measure horizontal, vertical and aerial distances.
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