Toposheet Of India

. PublicationsPublicationsMAPS (All Maps are printed in English language, except where otherwise stated )Our expertise in this field compares to the best anywhere in the world. They have tremendously rendered their services to the Government of India to bring out various types of maps for publication by Survey of India.Topographical Maps –These were printed by Survey of India on 1:250,000; 1:50,000 and 1:25,000 scales. Technically they were based on Everest Datum and Polyconic Projection.

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But, since National Mapping Policy - 2005 has been implemented (May 19, 2005) in our department the production of fresh topographical maps has been stopped. Till date target of 100% OSM sheets printing has not been achieved so these maps are still available in our map sale counters.Open Series Maps (OSM) – These are prepared on 1:250,000; 1:50,000 and 1:25,000 scales for the use of general public/civilians for supporting development activities in the country. Technically maps of this series are based on WGS-84 Datum and UTM Projection. They do not contain grid and classified information; therefore, they are kept under unrestricted category.

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They can be obtained from all map sale centre and other authorized agents deputed all over the country. Few sheets are also printed in Hindi and other regional languages.Defence Series Maps (DSM) - These are prepared on 1:250,000; 1:50,000 and 1:25,000 scales for the use of defence forces of India for supporting national security requirements. Technically maps of this series are based on WGS-84 Datum and LCC Projection. They contain full features of map with grid, contours and other classified information without any dilution of accuracy; therefore, they are kept under restricted category. Survey of India is only authorized for preparation and printing of DSM.