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U.K. and Ireland Trigpoints
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Description:
All survey marks or objects used by the UK Ordnance Survey, Ordnance Survey Northern Ireland (OSNI)
PLEASE NOTE, THERE IS A FACILITY TO SUGGEST CHANGES TO WAYMARKS, THE UK WAYMARKERS WOULD PREFER IF YOU EMAILED THEM DIRECT IF ANY CHANGES TO THEIR WAYMARKS ARE NEEDED. THANK YOU.

choose your Region from approved UK Region Map

Expanded Description:
All survey marks or objects used by the UK Ordnance Survey, Ordnance Survey Northern Ireland (OSNI) Ordnance Survey Ireland (OSI)& EA Environment Agency. Can include Cut bench marks, Rivets, Flush Brackets, Trig pillars in fact any point used and recorded by ordnance survey, OSNI or OSI. This category can include Triangulation Stations placed by the Admiralty Hydrographic Department that feature on various points around the UK coast. Can also include EABM (Environment Agency Bench Mark). Trigpoints are the common name for "triangulation pillars". These are concrete pillars, about 4' tall, which were used by the Ordnance Survey in order to determine the exact shape of the country. They are generally located on the highest bit of ground in the area, so that there is a direct line of sight from one to the next. By sitting a theodolite (an accurate compass built into a telescope) on the top of the pillar, accurate bearings to nearby trigpoints could be taken.
This category also includes any confirmed other Ordnance Survey marks such as cut bench marks, O/S tide markers, OS rivets, OS bolts, Fundamental bench marks, surface blocks, Berntsen's, blocks, passive and active GPS active stations and flush bracket's on constructions other than trig pillars. Many cut bench marks can be researched on www.old-maps.co.uk (1890's OS maps) which show their exact location and height. If you know of any other easily accessible resources please let group know.

EABM's are placed by the Environment Agency

Related and other useful sites.

www.trigpointinguk.com (OSGB36)

OS benchmarks (OSGB36)

Bench-marks.org.uk non trig pillar marks

Yahoo trig group Membership needed.

TrigTools.co.uk Co-ordinate conversion

MSN OSBM group (OSGB36)

www.nearby.org.uk (variety of datums) Co-ordinate conversions

OS map of Active Stations (OSGB36)

Waymarking.com uses WGS84 datum. Other sites use other datums.


Here are definitions of common OS marks.
OSBM BOLT "OSBM Bolt" is quite large - an inch or two in diameter (25 - 50mm) (sizes vary), with letters "O S B M" and an arrow engraved into the Bolt itself.(Some of the older ones have no markings.) Bolt
1GL BOLT or PA BOLT1GL BOLT or PA BOLT is a cut mark with a small bolt. The bolt can be next to the cut benchmark or in the apex. 1GL BOLT or PA BOLT
CUT BENCHMARK A cut mark in stone/brick. Some have been found upside-down. CUT BENCHMARK
RIVET WITH CUT BENCHMARK. A rivet is a small round headed bolt no more than half and inch (12mm) in diameter. They are situated ABOVE a cut benchmark. RIVET WITH CUT BENCHMARK
FUNDAMENTAL BENCHMARK. These are about a foot high (30 cm) with a large bolt on top, with a metal plaque. Worth noting also is that some standard FBMs have been cut down to ground level. Some of these have a new bolt on top, but not all. FUNDAMENTAL BENCHMARK
FLUSH BRACKET. These can be found on trig pillars, buildings, bridges etc. They all have an individual number, which you should log. FLUSH BRACKET
SURFACE BLOCK. A rivet set in a concrete base about 6 inches across (15cm) flush at ground level. SURFACE BLOCK
RIVET AND BENCHMARK (OLD STYLE) I have been told that it is the old style of rivet. It is like a headless nail which has been driven into the granite. The top of the stump protrudes out of the rock by about a quarter of an inch (6mm). The only place I have found one is on Dartmoor, where there are several. RIVET AND BENCHMARK (OLD STYLE)
PIVOT BENCH MARKS. A benchmark which has an empty hole above it. There is no horizontal mark. PIVOT BENCH MARKS
PROJECTING BRACKET. These brackets are the predecessor to the Flush Bracket. 258 listed on OSBM. PROJECTING BRACKET
BERNTSEN. Visible is a metal circular lid about 6 inches across (15cm) at ground level, covering a brass bolt. BERNSTEN
CURRY STOOL is a horizontal concrete tripod at ground level with arms about 3 feet (1m) long & a centre stud. 9 known in the UK. CURRY STOOL
BLOCKS. These are similar to a surface block, often replacing (and made from the remains of) a destroyed trig pillar. 17 known in the UK.
WM8CME is one
BLOCKS
ACTIVE STATIONS contain a GPS receiver antenna and sometimes meteorological instruments. Active Station Map. (Not publicly listed by OS.) Find an Active Station. Active
CONCRETE RING with a centre stud. 2 feet (55cm) diameter. 6 known in the UK. CONCRETE RING
(The pictures below have been borrowed from T:UK which will be replaced with our own waymarking photos when the objects have been submitted. If you are submitting any of the objects please could you let a manager know.)
FENOMARK. 10 of these are known in the UK. FENOMARK
CENTRE is a small cross engraved in metal. There are 2 known in the UK. CENTRE
GRAVITY FBM. Similar to a standard FBM, but bigger, and with a flush bracket. 4 known in the UK. GRAVITY FBM
BURIED BLOCKS 5 known. Like Surface Blocks but roughly one to two feet underground. (No photos in Waymark database yet.)
SPIDER. There are 6 left in the UK. They are similar to the spider on top of standard trig pillar, but placed elsewhere. e.g. in a wall (No photos in Waymark database yet.)
There are ANOMILIES. A raised block without Flush Bracket but with OSBM bolt under a trap door. Irish Pillar
Other survey marks.
ADMIRALTY HYDROGRAPHIC DEPARTMENT LEVEL MARKER. These markers are flat and about 6 inches across (15cm) , set in rock. ADMIRALTY HYDROGRAPHIC DEPARTMENT LEVEL MARKER
EABM (Environment Agency Bench Mark)EABM (Environment Agency Bench Mark)EABM (Environment Agency Bench Mark)

Instructions for Posting a U.K. and Ireland Trigpoints Waymark:
This category requires a CLOSE-UP photo of the OS object and a photo of the object with the general area taken by the waymarker.

When a trig is waymarked 2 photos are required, the trig and one of the flush bracket.

Most waymarkers submit two photos one close up of the object and one a little further away. The object must be recognizable in the photos.

Please ensure you complete both the short and long descriptions including street names if appropriate, nearest hamlet, village or town and County. (If these are not completed then your submission will be rejected.) Postcode is a bonus.

Ensure all Flush Bracket numbers are entered in the appropriate field.

Instructions for Visiting a Waymark in this Category:
A photo should be taken when you visit, and added to the log.
Category Settings:
  • Waymarks can be added to this category
  • New waymarks of this category are reviewed by the category group prior to being published
  • Category is visible in the directory
Variables:
  • Type of Trigpoint
  • Condition
  • Number on Flush Bracket
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Currently displaying U.K. and Ireland Trigpoints

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Image for Cut Bench Mark - Crossford Street, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Crossford Street, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a block of flats at the junction of Crossford Street and Lingham Street. The mark is on the south east face of the building, Crossford Street, at the building's south corner.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/11/2018

last visited: never

Image for Cut Bench Mark - Jeffreys Road, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Jeffreys Road, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a block of flats on the north east side of Jeffreys Road. The mark is on the south west face of the building at its south corner.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/11/2018

last visited: never

Image for Cut Bench Mark - Hartington Road, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Hartington Road, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into a brick wall at the junction of Hartington Road and Viceroy Road. The mark is on the west face of the wall close to a brick post at the end of the wall.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/11/2018

last visited: never

Image for Cut Bench Mark - Lansdowne Way, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Lansdowne Way, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a building at the junction of Lansdowne Way and Larkhall Lane. The mark is on the north, Lansdowne Way, face of the building at the north east corner where a garden wall joins the building.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/11/2018

last visited: never

Image for Cut Bench Mark - Lansdowne Way, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Lansdowne Way, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a large bus garage on the south side of Lansdowne Way. The mark is on the north face of the bus garage close to the north west corner.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/6/2018

last visited: never

Image for Cut Bench Mark - Clapham Common North Side, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Clapham Common North Side, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a boundary wall at the junction of Clapham Common North Side and Cedars Road. The mark is at the curved section of the wall.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/5/2018

last visited: never

Image for Cut Bench Mark - Baldwin Road, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Baldwin Road, London, UK

in U.K. and Ireland Trigpoints

This mark is cur into the brickwork of a building at the junction of Baldwin Road and Thurleigh Road. The mark is on the south west face of the building in Baldwin Road.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/5/2018

last visited: never

Image for Benchmark - St Nicholas - Lockington, Leicestershireview gallery
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U.K. and Ireland TrigpointsBenchmark - St Nicholas - Lockington, Leicestershire

in U.K. and Ireland Trigpoints

A cut benchmark on the south face of St Nicholas' bell tower, Lockington.

posted by: Groundspeak Premium Member SMacB

location: East Midlands, United Kingdom

date approved: 2/5/2018

last visited: never

Image for Cut Bench Mark - Macaulay Road, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Macaulay Road, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a block of flats on the south west side of Macaulay Road. The mark is on the north west face of the building.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/5/2018

last visited: never

Image for Cut Bench Mark - Shamrock Street, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Shamrock Street, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a building at the junction of Shamrock Street and Clapham Manor Street. The mark is on the north west face of the building in Shamrock Street.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/5/2018

last visited: never

Image for Benchmark - Lady Gate - Diseworth, Leicestershireview gallery
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U.K. and Ireland TrigpointsBenchmark - Lady Gate - Diseworth, Leicestershire

in U.K. and Ireland Trigpoints

A cut benchmark on a farm building on the east side of Lady Gate, Diseworth

posted by: Groundspeak Premium Member SMacB

location: East Midlands, United Kingdom

date approved: 2/5/2018

last visited: never

Image for Cut Mark - Roadside wall near Grisiau Cochion, Bethesda, Gwynedd, Walesview gallery
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U.K. and Ireland TrigpointsCut Mark - Roadside wall near Grisiau Cochion, Bethesda, Gwynedd, Wales

in U.K. and Ireland Trigpoints

Cut mark: On wall NE side of road, near Grisiau Cochion, Bethesda, Gwynedd, Wales.

posted by: Groundspeak Premium Member Meirion

location: North Wales, United Kingdom

date approved: 2/5/2018

last visited: never

Image for Cut Bench Mark - Lysias Road, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Lysias Road, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a building at the junction of Lysias Road and Alderbrook Road. The mark is on the north west face of the building at its north corner.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/3/2018

last visited: never

Image for Cut Bench Mark and Bolt - Lillieshall Road, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark and Bolt - Lillieshall Road, London, UK

in U.K. and Ireland Trigpoints

This mark, with bolt, is cut into the brickwork of a building at the junction of Lillieshall Road and North Street. The mark and bolt are on the north west, Lillieshall Road, face of the building at the north corner.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/1/2018

last visited: never

Image for Flush Bracket - Holy Trinity Church, Clapham Common, London, UKview gallery
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U.K. and Ireland TrigpointsFlush Bracket - Holy Trinity Church, Clapham Common, London, UK

in U.K. and Ireland Trigpoints

This flush bracket is attached to the south east face of Holy Trinity church on Clapham Common. The bracket is close to the south corner of the church.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 1/28/2018

last visited: never

Image for Cut Bench Mark - Holy Trinity Church, Clapham Common, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Holy Trinity Church, Clapham Common, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of Holy Trinity Church at Clapham Common. The mark is on the north west face of the church close to the west corner of the church.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 1/28/2018

last visited: never

Image for Cut Bench Mark - Belmont Road, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Belmont Road, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a building located at the junction of Beaumont Road and Grafton Square. The mark is on the north west (Belmont Road) face of the building.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 1/28/2018

last visited: never

Image for Cut Bench Mark - Clapham Manor Street, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Clapham Manor Street, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a building on the south west side of Clapham Manor Street at the junction with Clapham High Street.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 1/28/2018

last visited: never

Image for Cut Bench Mark - Clapham Park Road, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Clapham Park Road, London, UK

in U.K. and Ireland Trigpoints

The mark is cut into the stonework of a wall that is part of St Mary's chuech on the south west side of Clapham Park Road.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 1/28/2018

last visited: never

Image for Cut Bench Mark - Riverside, Twickenham, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Riverside, Twickenham, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a wall on the north west side of Riverside in Twickenham. The mark is almost directly below the arch bridge that spans Riverside.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 1/28/2018

last visited: never

Image for Bench Mark - All Saints' Church, Little Munden, Hertfordshire. SG12 0NJview gallery
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U.K. and Ireland TrigpointsBench Mark - All Saints' Church, Little Munden, Hertfordshire. SG12 0NJ

in U.K. and Ireland Trigpoints

A nice mark on the church tower.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 1/28/2018

last visited: never

Image for Pivot - Grimes Gate - Diseworth, Leicestershireview gallery
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U.K. and Ireland TrigpointsPivot - Grimes Gate - Diseworth, Leicestershire

in U.K. and Ireland Trigpoints

A pivot mark on a farmhouse on the west side of Grimes Gate, Diseworth.

posted by: Groundspeak Premium Member SMacB

location: East Midlands, United Kingdom

date approved: 1/28/2018

last visited: never

Image for Cut Bench Mark - Rectory Grove, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Rectory Grove, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a building on the north west side of Rectory Grove. The mark is on the north face of the building at the building's north east corner.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 1/28/2018

last visited: never

Image for Cut Bench Mark - St Mary's Church, Twickenham, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - St Mary's Church, Twickenham, UK

in U.K. and Ireland Trigpoints

The mark is cut into a band of stonework on the south east face of St Mary's church in Twickenham.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 1/24/2018

last visited: never

Image for Cut Bench Mark - The Embankment, Twickenham, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - The Embankment, Twickenham, UK

in U.K. and Ireland Trigpoints

The mark is cut into a brick wall at the south west end of The Embankment on the north west bank of the River Thames in Twickenham.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 1/24/2018

last visited: never

Total Records: 6984 Page: 1 of 280 prev<<<[12345678910]>>>next
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