1922 Index of Great Trigonometrical Survey of India
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Index to the Great Trigonometrical Survey of India (1922). India is shown on a 1-degree grid of green lines. The blue triangles indicate the Great Trigonometrical w:triangulation measurements. Triangulation series are indicated by a number in parentheses. These series are described in the table at the bottom left. The red dash-dot lines are telegraph longitude area . Among the many accomplishments of the Survey were the demarcation of the British territories in India and the measurement of the height of the Himalayan giants: Everest , K2 , and Kanchenjunga .
Fotograf/eser: Survey of India, Government of India.
Public domain — serbestce kullanilabilir.
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