Trigonometrical survey

a survey of a portion of country by measuring a single base, and connecting it with various points in the tract surveyed by a series of triangles, the angles of which are carefully measured, the relative positions and distances of all parts being computed from these data.
See under Survey.

See also: Survey, Trigonometric

References in periodicals archive ?
LAHORE: The present urban flood threat in Pakistan reminds me of the Great Trigonometrical Survey of India, which is known to geographers, surveyors and the general public by its acronym, GTSI.
The final chapter on Adventurous Travel examines the Great Trigonometrical Survey of India which began in 1802 and took some 75 years to complete.
In 1819, it was noted how he walked 586 miles in 22 days during his surveying work and, the following year, he was appointed by the Duke of Wellington as superintendent of the trigonometrical survey. After a long and successful career, he died in New Brighton in 1852 with the title of Major General and the Director of the Ordnance Survey.
The Himalaya has always been a region of myth and cosmological creation for the Indian subcontinent, an other-worldly abode of the gods, but at the same time an actual mountain range mapped by the Great Trigonometrical Survey in the 19th century, and the living place of richly varied communities.
Through the courtesy of the Director of the SA Trigonometrical Survey Office (Mr Boonzeier) sixteen concrete pillars were constructed by the Trig Surveyor Beacon Building section along the line for the mounting of the telescopes.
Cesar Francois Cassini de Thury born; a French astronomer, grandson of Jean-Dominique Cassini; appointed Director of the Paris Observatory in 1771; undertook and completed a trigonometrical survey of France.
Before leaving for the climb he told AFP in Kathmandu: "It's not about a personal achievement for me, it's about being a role model." Everest was named in 1852 by the colonial-era Great Trigonometrical Survey of India which singled out the until then unremarkable peak in the eastern Himalayas as the tallest mountain in the world.
Chapter 4, 'Gluing It All Together' takes us from the Plains of India and the Great Trigonometrical Survey, to indulging in the "endless pleasure to be derived from continuing Alfred Wegener's work in fitting the continents back together".
Mann (1819-1907) According to the article by Peter Orlovich in Volume 5 of the Australian Dictionary of Biography, after four years in the British Army, Mann joined the Trigonometrical Survey of Britain.
He is, of course, referring to the Great Trigonometrical Survey of India, which followed the arc of a meridian from the southernmost tip of the subcontinent up to the northernmost region of Kashmir, covering a distance of 3,000 kilometres.
This book discusses the work of a 'group of explorer-spies whose intelligence gathering enabled the Great Trigonometrical Survey of India' to map areas never before surveyed.