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It has been hypothesized that the Toba supereruption about 74,000 years ago destroyed much of India's central forests, covering it with a layer of volcanic ash, and may have brought humans worldwide to a state of near-extinction by suddenly plunging the planet into an ice-age that could have lasted for up to 1,800 years. [4]
Joseph E. Schwartzberg (2008) proposes that the Bronze Age Indus Valley civilization (c. 2500–1900 BCE) may have known "cartographic activity" based on a number of excavated surveying instruments and measuring rods and that the use of large scale constructional plans, cosmological drawings, and cartographic material was known in India with some regularity since the Vedic period (1st ...
Advisor to the Indian Government: The Survey of India acts as an adviser to the Government of India on all cartography-related matters, such as geodesy, photogrammetry, mapping and map reproduction. Geo names: Survey of India is responsible for the naming convention and spellings of names of geographical features of India .
The Great Trigonometrical Survey of India was a project that aimed to carry out a survey across the Indian subcontinent with scientific precision. It was begun in 1802 by the British infantry officer William Lambton, under the auspices of the East India Company. [1]
The precise definition of an "Indian subcontinent" in a geopolitical context is somewhat contested as there is no globally accepted definition on which countries are a part of South Asia or the Indian subcontinent. [61] [62] [63] [6] Whether called the Indian subcontinent or South Asia, the definition of the geographical extent of this region ...
A topographic survey is typically based upon a systematic observation and published as a map series, made up of two or more map sheets that combine to form the whole map. A topographic map series uses a common specification that includes the range of cartographic symbols employed, as well as a standard geodetic framework that defines the map ...
Hinduism expansion in Asia, from its heartland in Indian Subcontinent, to the rest of Asia, especially Southeast Asia, started circa 1st century marked with the establishment of early Hindu settlements and polities in Southeast Asia. By 600 BC, India had been divided into 17 regional states that would occasionally feud amongst themselves.
An arc of mountains consisting of the Himalayas, Hindu Kush, and Patkai ranges define the northern frontiers of the Indian subcontinent. [20] These were formed by the ongoing tectonic plates collision of the Indian and Eurasian plates. The mountains in these ranges include some of the world's tallest mountains which act as a barrier to cold ...