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Within this triangle, the distance between the sensors is the base b and must be known. By determining the angles between the projection rays of the sensors and the basis, the intersection point, and thus the 3D coordinate, is calculated from the triangular relations.
Triangulation of Kodiak Island in Alaska in 1929. In surveying, triangulation is the process of determining the location of a point by measuring only angles to it from known points at either end of a fixed baseline by using trigonometry, rather than measuring distances to the point directly as in trilateration. The point can then be fixed as ...
The Retriangulation of Great Britain was a triangulation project carried out between 1935 and 1962 that sought to improve the accuracy of maps of Great Britain. [1] Data gathered from the retriangulation replaced data gathered during the Principal Triangulation of Great Britain, which had been performed between 1783 and 1851. [2]
Their precise locations were determined by triangulation, and the details in between were then filled in with less precise methods. Modern Ordnance Survey maps are largely based on orthorectified aerial photographs, but large numbers of the triangulation pillars remain, many of them adopted by private land owners. The Ordnance Survey still has ...
In Japan, there are five classes of triangulation stations (三角点, sankakuten, lit. 'three corner points'): Class 1 (一等三角点, ittō sankakuten) They are installed approximately every 40 kilometres (25 mi), with smaller ones (as necessary) about every 25 kilometres (16 mi). [3] There are about 1000 throughout Japan.
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The Principal Triangulation of Britain was the first high-precision triangulation survey of the whole of Great Britain and Ireland, carried out between 1791 and 1853 under the auspices of the Board of Ordnance. The aim of the survey was to establish precise geographical coordinates of almost 300 significant landmarks which could be used as the ...
To triangulate an implicit surface (defined by one or more equations) is more difficult. There exist essentially two methods. There exist essentially two methods. One method divides the 3D region of consideration into cubes and determines the intersections of the surface with the edges of the cubes in order to get polygons on the surface, which ...