triangulation - šø Land Surveying Photos - Land Surveyors United - Global Surveying Community2024-03-28T20:54:41Zhttps://landsurveyorsunited.com/photo/feed/tag/triangulationtriangulationhttps://landsurveyorsunited.com/photo/triangulation2019-09-29T23:56:25.000Z2019-09-29T23:56:25.000Zā”Survenatorāhttps://landsurveyorsunited.com/surveyors/Survenator<div><img src="https://storage.ning.com/topology/rest/1.0/file/get/3635444503?profile=RESIZE_400x&width=400"></div><div><p>Illustration from JW Zollmann, Complete Guide to Geodesy or Practical Geometry, Hall 1744</p>
<p>In this method of earth measurement, the country is covered with a network of triangles (latin: triangula), which collide at their sides and whose corners are formed by high points such as church towers or distinctive hilltops.<br />At the beginning of a triangulation, a short distance is measured very precisely, from the ends of which a further point is aimed, which then forms the third corner of the first triangle.Ā From each side of this first triangle now more points can be targeted and thus new triangles are formed.<br />A number of monuments are still reminiscent of the Gaussian land surveying:<br />the southern meridian sign in the Friedlander Forst, the GauĆturm on the Hohen Hagen and someĀ <a href="http://webdoc.sub.gwdg.de/ebook/e/2005/gausscd/html/kapitel_landv_punkte.htm">observation points secured</a>Ā asĀ <a href="http://webdoc.sub.gwdg.de/ebook/e/2005/gausscd/html/kapitel_landv_punkte.htm">monuments</a>Ā .</p></div>Nevis Island Survey 1973https://landsurveyorsunited.com/photo/nevis-island-survey-19732017-01-29T20:03:45.000Z2017-01-29T20:03:45.000ZEd Dansonhttps://landsurveyorsunited.com/surveyors/EdDanson<div><img src="https://storage.ning.com/topology/rest/1.0/file/get/1206272688?profile=RESIZE_400x&width=400"></div><div>Saddle Hill trig station - hunting for a target with a prismatic compass. Those were the days... Ed Danson.</div>Scorus pillarhttps://landsurveyorsunited.com/photo/scorus-pillar2013-05-04T07:00:47.000Z2013-05-04T07:00:47.000ZDAN POPESCUhttps://landsurveyorsunited.com/surveyors/DANPOPESCU<div><img src="https://storage.ning.com/topology/rest/1.0/file/get/1206158970?profile=RESIZE_400x&width=400"></div><div>Monumentation of point in 1937.</div>SCORUS, a III-rd order pointhttps://landsurveyorsunited.com/photo/scorus-a-iii-rd-order-point2013-05-04T07:00:30.000Z2013-05-04T07:00:30.000ZDAN POPESCUhttps://landsurveyorsunited.com/surveyors/DANPOPESCU<div><img src="https://storage.ning.com/topology/rest/1.0/file/get/1206158838?profile=RESIZE_400x&width=400"></div><div>Point is about 25 km est of Ploiesti (Prahova county). Monumentation of point in 1937.</div>boldesti_gradisteahttps://landsurveyorsunited.com/photo/boldesti-gradistea2013-05-04T06:49:39.000Z2013-05-04T06:49:39.000ZDAN POPESCUhttps://landsurveyorsunited.com/surveyors/DANPOPESCU<div><img src="https://storage.ning.com/topology/rest/1.0/file/get/1206158708?profile=RESIZE_400x&width=400"></div><div>boldesti_gradistea pyramid</div>boldesti gradisteahttps://landsurveyorsunited.com/photo/boldesti-gradistea-12013-05-04T06:49:37.000Z2013-05-04T06:49:37.000ZDAN POPESCUhttps://landsurveyorsunited.com/surveyors/DANPOPESCU<div><img src="https://storage.ning.com/topology/rest/1.0/file/get/1206158814?profile=RESIZE_400x&width=400"></div><div>both pillars from a I-st order roumanian triangulation point.</div>Triangulation Pointhttps://landsurveyorsunited.com/photo/triangulation-point2012-01-22T22:59:13.000Z2012-01-22T22:59:13.000ZTim K.https://landsurveyorsunited.com/surveyors/TimK<div><img src="https://storage.ning.com/topology/rest/1.0/file/get/1198995679?profile=RESIZE_400x&width=400"></div><div>The same monument from some distance to show its position. The TP is the monument on the right of the red fence.The monument on the left is only a boundary stone made of concrete to mark the boundary between the land of the church (on the right) and the street on the left. Almost same size, but it even looks much less important being made of concrete instead of granite.</div>Trigonometrical/Triangulation Pointhttps://landsurveyorsunited.com/photo/trigonometrical-triangulation-point2012-01-22T22:21:54.000Z2012-01-22T22:21:54.000ZTim K.https://landsurveyorsunited.com/surveyors/TimK<div><img src="https://storage.ning.com/topology/rest/1.0/file/get/1198993692?profile=RESIZE_400x&width=400"></div><div>A trigonometrical or triangulation point (Trigonometrischer Punkt/Triangulationspunkt) in my hometown, in front of the church.The pillar is made of natural stone, probably granite. As typical for this kind of monument, on the southern side it bears the inscription TP, on the southern side there is a triangle symbol. But this is partial covered by plants and the ground and hardly readable.Exactly below the pillar there is probably a sub-surface granite plate with a cross to mark the position even if the pillar gets misplaced or even lost. But of cause I didn't try to dig it out to know it for sure. ;-)These TPs have been quite important as reference points for surveys before GPS came into use. But now their importance declined and as far as I know their maintenance as been suspended in most states.</div>