X-Nico

unusual facts about Triangulation


Theodolite

Triangulation, as invented by Gemma Frisius around 1533, consists of making such direction plots of the surrounding landscape from two separate standpoints.


Angular Recording Corporation

Set up in June 2003 by two ex-Goldsmiths College students, Joe Daniel and Joe Margetts, who reclaimed a local Ordnance Survey Triangulation Station and made it their first artefact: ARC 001.

Causal dynamical triangulation

Causal dynamical triangulation (abbreviated as CDT) invented by Renate Loll, Jan Ambjørn and Jerzy Jurkiewicz, and popularized by Fotini Markopoulou and Lee Smolin, is an approach to quantum gravity that like loop quantum gravity is background independent.

Combinatorial class

For instance, the triangulations of regular polygons (with size given by the number of sides of the polygon, and a fixed choice of polygon to triangulate for each size) and the set of unrooted binary plane trees (up to graph isomorphism, with a fixed ordering of the leaves, and with size given by the number of leaves) are both counted by the Catalan numbers, so they form isomorphic combinatorial classes.

Julius Erasmus Hilgard

In 1875 he wrote a paper for the American Association for the Advancement of Science "On the Measurement of a Base Line for the Primary Triangulation of the United States Coast Survey near Atlanta, Georgia;" another for the Philosophical Society of Washington on "The Relation of the Legal Standards of Measure of the United States to those of Great Britain and France."

Location-based routing

The location of call origin is normally determined by the outgoing caller ID of the caller but can also be determined by GPS position or signal triangulation, the latter being particularly useful for calls coming from mobile phones.

Minimum-weight triangulation

It is also possible to formulate a version of the point set or polygon triangulation problems in which one is allowed to add Steiner points, extra vertices, in order to reduce the total edge length of the resulting triangulations.

Opio

Opio has appeared on all four Souls of Mischief albums, both Hieroglyphics studio albums, and released his solo debut, Triangulation Station, in February, 2005 on the Hieroglyphics' own independent label, Hieroglyphics Imperium Recordings.

Pitteway triangulation

When such a triangulation exists it is a special case of the Delaunay triangulation, and consists of the union of the Gabriel graph and convex hull.

Thus, a circle having that edge as diameter must be empty of vertices, so the Pitteway triangulation consists of the Gabriel graph together with the convex hull of the point set.

Thomas Maclear

In 1750 Abbe Nicolas Louis de Lacaille had measured a triangulation arc northwards from Cape Town, to determine the shape of the earth and found that the curvature of the earth was less in southern latitudes than at corresponding northern ones.

Williams Rocks

The Williams Rocks were named by the ANCA for J. Williams, assistant diesel mechanic at Mawson Station in 1962, who assisted in a triangulation of the Williams Rocks and the erection of a beacon.


see also