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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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Total Records: 6153 Page: 1 of 247 prev<<<[12345678910]>>>next
Image for Benchmark, St David - Davidstow, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, St David - Davidstow, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark on south west angle, south face of church tower. St David's, Davidstow.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/15/2015

last visited: never

Image for Benchmark, St Mary Almer - Almer, Dorsetview gallery
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U.K. and Ireland TrigpointsBenchmark, St Mary Almer - Almer, Dorset

in U.K. and Ireland Trigpoints

Cut benchmark on south east face, south angle of church tower, St Mary's, Almer.

posted by: Groundspeak Premium Member SMacB

location: Southern England, United Kingdom

date approved: 4/15/2015

last visited: never

Image for Benchmark , St Laurence - Affpuddle, Dorsetview gallery
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U.K. and Ireland TrigpointsBenchmark , St Laurence - Affpuddle, Dorset

in U.K. and Ireland Trigpoints

Cut benchmark on south west angle of church tower, St Laurence, Affpuddle.

posted by: Groundspeak Premium Member SMacB

location: Southern England, United Kingdom

date approved: 4/15/2015

last visited: never

Image for Benchmark, Holy Trinity - West Lulworth, Dorsetview gallery
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U.K. and Ireland TrigpointsBenchmark, Holy Trinity - West Lulworth, Dorset

in U.K. and Ireland Trigpoints

Cut benchmark on north west face of Holy Trinity church, West Lulworth.

posted by: Groundspeak Premium Member SMacB

location: Southern England, United Kingdom

date approved: 4/14/2015

last visited: never

Image for Benchmark and 1GL bolt, St Michael - Owermoigne, Dorsetview gallery
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U.K. and Ireland TrigpointsBenchmark and 1GL bolt, St Michael - Owermoigne, Dorset

in U.K. and Ireland Trigpoints

Cut benchmark and 1GL Bolt in South-west angle of St Michael's church, Owermoigne ; 2.84 ft. above surface.

posted by: Groundspeak Premium Member SMacB

location: Southern England, United Kingdom

date approved: 4/12/2015

last visited: never

Image for Benchmark - St George - Langton Matravers, Dorsetview gallery
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U.K. and Ireland TrigpointsBenchmark - St George - Langton Matravers, Dorset

in U.K. and Ireland Trigpoints

Cut benchmark on the south west corner of St George's church, Langton Matravers

posted by: Groundspeak Premium Member SMacB

location: Southern England, United Kingdom

date approved: 4/10/2015

last visited: never

Image for Benchmark - Miles & Son, Station Road - Swanage, Dorsetview gallery
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U.K. and Ireland TrigpointsBenchmark - Miles & Son, Station Road - Swanage, Dorset

in U.K. and Ireland Trigpoints

Cut benchmark on Miles & Son estate agents, Station Road, Swanage.

posted by: Groundspeak Premium Member SMacB

location: Southern England, United Kingdom

date approved: 4/9/2015

last visited: never

Image for Benchmark - Weyfish Ltd, Custom House Quay - Weymouth, Dorsetview gallery
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U.K. and Ireland TrigpointsBenchmark - Weyfish Ltd, Custom House Quay - Weymouth, Dorset

in U.K. and Ireland Trigpoints

Cut benchmark on Weyfish Ltd premises, Custom House Quay, Weymouth.

posted by: Groundspeak Premium Member SMacB

location: Southern England, United Kingdom

date approved: 4/9/2015

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a building on the north east side of Leicester Court close to the junction with Cranbourn Street.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 4/6/2015

last visited: never

Image for Cut-mark, St Mary's Church, Earl Stonham, Suffolk, IP14 5EEview gallery
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U.K. and Ireland TrigpointsCut-mark, St Mary's Church, Earl Stonham, Suffolk, IP14 5EE

in U.K. and Ireland Trigpoints

St Mary's, Earl Stonham, is on the A1120 between Forward Green and the A140 at Earl Stonham. This is a well preserved cut-mark on the base of the tower.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 3/30/2015

last visited: never

Image for Cut Mark, Church St.Mary the Virgin, The Causeway, Walsham le Willows, Suffolk. IP31 3AA.view gallery
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U.K. and Ireland TrigpointsCut Mark, Church St.Mary the Virgin, The Causeway, Walsham le Willows, Suffolk. IP31 3AA.

in U.K. and Ireland Trigpoints

Worn but legible on the east face of the south-east tower buttress.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 3/30/2015

last visited: never

Image for St Johns Church Tauntonview gallery
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U.K. and Ireland TrigpointsSt Johns Church Taunton

in U.K. and Ireland Trigpoints

Cut bench mark on church

posted by: Groundspeak Premium Member dave.johnson

location: South West England, United Kingdom

date approved: 3/26/2015

last visited: never

Image for Taunton Crown Court. Cut bench markview gallery
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U.K. and Ireland TrigpointsTaunton Crown Court. Cut bench mark

in U.K. and Ireland Trigpoints

Cut Bench mark on court building

posted by: Groundspeak Premium Member dave.johnson

location: South West England, United Kingdom

date approved: 3/26/2015

last visited: never

Image for Hare Farm Cut Bench Mark, Hare Lane, Broadway, Devonview gallery
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U.K. and Ireland TrigpointsHare Farm Cut Bench Mark, Hare Lane, Broadway, Devon

in U.K. and Ireland Trigpoints

Cut Bench Mark

posted by: Groundspeak Premium Member dave.johnson

location: South West England, United Kingdom

date approved: 3/25/2015

last visited: 3/26/2015

Image for Benchmark, St John the Baptist - Muston, Leicestershireview gallery
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U.K. and Ireland TrigpointsBenchmark, St John the Baptist - Muston, Leicestershire

in U.K. and Ireland Trigpoints

Cut benchmark on north west angle of St John the Baptist church tower, Muston.

posted by: Groundspeak Premium Member SMacB

location: East Midlands, United Kingdom

date approved: 3/24/2015

last visited: never

Image for Benchmark & PA Bolt - St Lawrence - Sedgebrook, Lincolnshireview gallery
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U.K. and Ireland TrigpointsBenchmark & PA Bolt - St Lawrence - Sedgebrook, Lincolnshire

in U.K. and Ireland Trigpoints

Cut benchmark and PA bolt, west face, north west angle of St Lawrence church tower, Sedgebrook.

posted by: Groundspeak Premium Member SMacB

location: East Midlands, United Kingdom

date approved: 3/23/2015

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a building at the junction of Swan Street and Trinity Church Square. The mark is cut into the Swan Street face of the building.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 3/23/2015

last visited: never

Image for Benchmark & 1GL bolt - St Mary - Marston, Lincolnshireview gallery
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U.K. and Ireland TrigpointsBenchmark & 1GL bolt - St Mary - Marston, Lincolnshire

in U.K. and Ireland Trigpoints

Cut benchmark & 1GL bolt on the west face of of the buttress at the south west angle of the tower of St Mary's church, Marston.

posted by: Groundspeak Premium Member SMacB

location: East Midlands, United Kingdom

date approved: 3/23/2015

last visited: never

Image for Benchmark & 1GL Bolt - St James - Dry Doddington, Lincolnshireview gallery
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U.K. and Ireland TrigpointsBenchmark & 1GL Bolt - St James - Dry Doddington, Lincolnshire

in U.K. and Ireland Trigpoints

Cut benchmark and hole where 1GL bolt used to be on west face of the church tower of St James', Dry Doddington.

posted by: Groundspeak Premium Member SMacB

location: East Midlands, United Kingdom

date approved: 3/22/2015

last visited: never

Image for Cut Bench Mark & Bolt - Trinity Church Square, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark & Bolt - Trinity Church Square, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the stonework, on the south west face, of The Henry Wood Hall that was formerly known as Holy Trinity Church.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 3/22/2015

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of Becket House on the south west side of Tabard Street close to the junction with Pilgrimage Street.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 3/22/2015

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of Pilgrim House on the north east side of Tabard Street at the junction with Law Street. The mark is on the Tabard Street face of the building.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 3/22/2015

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a viaduct buttress on the south west side of Druid Street close to the junction with Brunswick Court.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 3/22/2015

last visited: never

Image for Benchmark, St Swithun - Leadenham, Lincolnshireview gallery
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U.K. and Ireland TrigpointsBenchmark, St Swithun - Leadenham, Lincolnshire

in U.K. and Ireland Trigpoints

Cut benchmark on St Swithun's church, Leadenham. North west angle of church tower, west face.

posted by: Groundspeak Premium Member SMacB

location: East Midlands, United Kingdom

date approved: 3/21/2015

last visited: never

Image for Benchmark, St Chad - Welbourn, Lincolnshireview gallery
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U.K. and Ireland TrigpointsBenchmark, St Chad - Welbourn, Lincolnshire

in U.K. and Ireland Trigpoints

Cut benchmark on the west side of the south porch, St Chad's church, Welbourn

posted by: Groundspeak Premium Member SMacB

location: East Midlands, United Kingdom

date approved: 3/21/2015

last visited: never

Total Records: 6153 Page: 1 of 247 prev<<<[12345678910]>>>next
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