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Why is this symbol hidden everywhere in the UK
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yayınlandı 23 Aug 2025 / İçinde
Film ve Animasyon
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https://en.wikipedia.org/wiki/....Benchmark_(surveying
The term benchmark, bench mark, or survey benchmark originates from the chiseled horizontal marks that surveyors made in stone structures, into which an angle iron could be placed to form a "bench" for a leveling rod, thus ensuring that a leveling rod could be accurately repositioned in the same place in the future. These marks were usually indicated with a chiseled arrow – specifically a broad arrow – below the horizontal line. A benchmark is a type of survey marker.
The term is generally applied to any item used to mark a point as an elevation reference. Frequently, bronze or aluminum disks are set in stone or concrete, or on rods driven deeply into the earth to provide a stable elevation point. If an elevation is marked on a map, but there is no physical mark on the ground, it is a spot height.
The height of a benchmark is calculated relative to the heights of nearby benchmarks in a network extending from a fundamental benchmark. A fundamental benchmark is a point with a precisely known relationship to the vertical datum of the area, typically mean sea level. The position and height of each benchmark are shown on large-scale maps.
The terms "height" and "elevation" are often used interchangeably, but in many jurisdictions, they have specific meanings; "height" commonly refers to a local or relative difference in the vertical (such as the height of a building), whereas "elevation" refers to the difference from a nominated reference surface (such as sea-level, or a mathematical/geodetic model that approximates the sea level known as the geoid). Elevation may be specified as normal height (above a reference ellipsoid), orthometric height, or dynamic height which have slightly different definitions.
Triangulation points, also known as trig points, are marks with a precisely established horizontal position. These points may be marked by disks similar to benchmark disks, but set horizontally, and are also sometimes used as elevation benchmarks. Prominent features on buildings such as the tip of a church spire or a chimney stack are also used as reference points for triangulation. In the United Kingdom, triangulation points are often set in large concrete markers that, as well as functioning as triangulation points, have a benchmark set into the side. With the increasing use of GPS and electronic distance measuring devices, the same techniques and equipment are used to fix the horizontal and vertical position of a survey marker at the same moment, and therefore the marks are usually regarded as "fixed in three dimensions".
Flush brackets are metal plates placed flush into the faces of buildings or other structures. Although many are attached to triangulation pillars as above, Non-Pillar Flush Brackets were also frequently located in the faces of buildings.[1]
https://en.wikipedia.org/wiki/Survey_marker
Similar to the Brit MOD Arrow Mark stamped on weapons and kit. Also a similar design was printed on British prisoner uniforms for a time. Greys with a bunch of bench marks over the shirts and trousers. Symbol used for cartographers and artillery - the stereoscopic rangefinder.
yea, not your property if they can just enter your property without your permission whenever the hell they feel like it...
its need at all, but they could have bought small plots from the owners to have small 5x5 foot square spots where they could then place the markers...
those nano plots would then be owned by the survey group (or whatever) and 'the crown'...
course you do not own your land anyways because you get to pay the gov. "taxes" on that land that is supposed to be yours...