<Li> Gravitational influence of mountains on pendulums </Li> <Li> Height above sea level </Li> <P> Thomas George Montgomerie organized several cartographic expeditions to map Tibet, as well as China . Mohamed - i - Hameed, Nain Singh and Mani Singh were among the agents employed by the British for their cartographic operations . Nain Singh, in particular, became famous for his geographical knowledge of Asia, and was awarded several honors for his expeditions . </P> <P> The modern map making techniques in India, like other parts of the world, employ digitization, photographic surveys and printing . Satellite imageries, aerial photographs and video surveying techniques are also used . The Indian IRS - P5 (CARTOSAT - 1) was equipped with high resolution panchromatic equipment to enable it for cartographic purposes . IRS - P5 (CARTOSAT - 1) was followed by a more advanced model named IRS - P6 developed also for agricultural applications . The CARTOSAT - 2 project, equipped with single panchromatic camera which supported scene specific on - spot images, succeed the CARTOSAT - 1 project . </P>

How did the science of cartography come to india