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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: 5903 Page: 1 of 237 prev<<<[12345678910]>>>next
Image for Bench Mark and Rivet, Church of the The Holy Family and All Saints, Guithavon Street, WITHAM, Essex. CM8 1BNview gallery
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U.K. and Ireland TrigpointsBench Mark and Rivet, Church of the The Holy Family and All Saints, Guithavon Street, WITHAM, Essex. CM8 1BN

in U.K. and Ireland Trigpoints

Cut-mark with rivet on the south-west buttress of this Catholic Church.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 11/19/2014

last visited: never

Image for Cut-mark, Saul's Bridge, Maldon Road, Witham, Essex.view gallery
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U.K. and Ireland TrigpointsCut-mark, Saul's Bridge, Maldon Road, Witham, Essex.

in U.K. and Ireland Trigpoints

This Cut-mark is on the oldest iron bridge in Essex still in use for its original purpose.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 11/18/2014

last visited: never

Image for Plug Bolt and Cut-mark, Church of St.Bartholomew, Church Road, Wickham Bishops, Essex. CM8 3LA.view gallery
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U.K. and Ireland TrigpointsPlug Bolt and Cut-mark, Church of St.Bartholomew, Church Road, Wickham Bishops, Essex. CM8 3LA.

in U.K. and Ireland Trigpoints

Only just discernible on the north-west tower buttress.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 11/13/2014

last visited: never

Image for CBM, Weston Methodist Church, Weston, Staffsview gallery
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U.K. and Ireland TrigpointsCBM, Weston Methodist Church, Weston, Staffs

in U.K. and Ireland Trigpoints

A Cut Benchmark located on the side of the west facing wall of Weston Methodist Church, Weston, Staffordshire. It's in good condition and clearly visible on it's own stone inlaid in the wall.

posted by: Groundspeak Premium Member PazaUK

location: West Midlands, United Kingdom

date approved: 11/12/2014

last visited: never

Image for Flush Bracket, All Saints Church, Wath-on-Dearne, South Yorkshire.view gallery
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U.K. and Ireland TrigpointsFlush Bracket, All Saints Church, Wath-on-Dearne, South Yorkshire.

in U.K. and Ireland Trigpoints

Flush Bracket on the side of the church.

posted by: Groundspeak Premium Member wireworm

location: Yorkshire, United Kingdom

date approved: 11/6/2014

last visited: 11/7/2014

Image for Benchmark and rivet, St Mary - Usk, Monmouthshireview gallery
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U.K. and Ireland TrigpointsBenchmark and rivet, St Mary - Usk, Monmouthshire

in U.K. and Ireland Trigpoints

Cut benchmark and rivet on the porch of St Mary's's church, Usk. South East face, east angle.

posted by: Groundspeak Premium Member SMacB

location: South Wales, United Kingdom

date approved: 10/30/2014

last visited: never

Image for Benchmark, St Edmund - Crickhowell, Powysview gallery
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U.K. and Ireland TrigpointsBenchmark, St Edmund - Crickhowell, Powys

in U.K. and Ireland Trigpoints

Cut benchmark on the church of St Edmund, Crickhowell. North west angle.

posted by: Groundspeak Premium Member SMacB

location: South Wales, United Kingdom

date approved: 10/29/2014

last visited: never

Image for Benchmark, All Saints - Bwlch, Powysview gallery
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U.K. and Ireland TrigpointsBenchmark, All Saints - Bwlch, Powys

in U.K. and Ireland Trigpoints

Cut Benchmark on All Saints' chapel, Bwlch, in the Parish of Llyn Safaddan. NW corner, E face of building

posted by: Groundspeak Premium Member SMacB

location: South Wales, United Kingdom

date approved: 10/29/2014

last visited: never

Image for Benchmark, Brecon Presbyterian Church - Brecon, Powysview gallery
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U.K. and Ireland TrigpointsBenchmark, Brecon Presbyterian Church - Brecon, Powys

in U.K. and Ireland Trigpoints

Cut benchmark by the entrance to Brecon Presbyterian Church.

posted by: Groundspeak Premium Member SMacB

location: South Wales, United Kingdom

date approved: 10/29/2014

last visited: never

Image for Benchmark, The Barracks - Brecon, Powysview gallery
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U.K. and Ireland TrigpointsBenchmark, The Barracks - Brecon, Powys

in U.K. and Ireland Trigpoints

Cut benchmark in the wall of the Barracks, Watton (B4601), Brecon

posted by: Groundspeak Premium Member SMacB

location: South Wales, United Kingdom

date approved: 10/29/2014

last visited: never

Image for Cut mark and PA bolt, St. John the Evangelist - Brecon, Powysview gallery
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U.K. and Ireland TrigpointsCut mark and PA bolt, St. John the Evangelist - Brecon, Powys

in U.K. and Ireland Trigpoints

Cut benchmark and PA bolt on Brecon Cathedral buttress, North West angle of tower, North face.

posted by: Groundspeak Premium Member SMacB

location: South Wales, United Kingdom

date approved: 10/28/2014

last visited: never

Image for Cut Mark, Church of St Mary the Virgin, Church Street, Wendens Ambo, Essex. CB11 4JZview gallery
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U.K. and Ireland TrigpointsCut Mark, Church of St Mary the Virgin, Church Street, Wendens Ambo, Essex. CB11 4JZ

in U.K. and Ireland Trigpoints

A cut mark in nice condition on the north-west corner of the church tower.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 10/28/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a bridge buttress on the north west side of Battersea Park Road. The mark is difficult to miss as someone, probably a surveyor, has painted it white.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/27/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into a parapet at the southern end of Chelsea Bridge on the south west side of Queenstown Road.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/27/2014

last visited: never

Image for Benchmark, St Peter and St Illtyd - Llanhamlach, Breconshireview gallery
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U.K. and Ireland TrigpointsBenchmark, St Peter and St Illtyd - Llanhamlach, Breconshire

in U.K. and Ireland Trigpoints

Cut benchmark on St Peter & St Illtyd's church, Llanhamlach. North West angle, West face.

posted by: Groundspeak Premium Member SMacB

location: South Wales, United Kingdom

date approved: 10/27/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the corner brickwork of a block of flats on the east side of Ebury Bridge Road opposite St Barnabas Street.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/27/2014

last visited: never

Image for Benchmark, St John the Baptist - Upton Bishop, Herefordshireview gallery
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U.K. and Ireland TrigpointsBenchmark, St John the Baptist - Upton Bishop, Herefordshire

in U.K. and Ireland Trigpoints

Cut benchmark on St John the Baptist church, Upton Bishop

posted by: Groundspeak Premium Member SMacB

location: Southern England, United Kingdom

date approved: 10/27/2014

last visited: never

Image for Benchmark, St Mary - Newent, Gloucestershireview gallery
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U.K. and Ireland TrigpointsBenchmark, St Mary - Newent, Gloucestershire

in U.K. and Ireland Trigpoints

Cut benchmark on buttress of St Mary's church, South East face, South angle.

posted by: Groundspeak Premium Member SMacB

location: West Midlands, United Kingdom

date approved: 10/27/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a block of flats, Dryburgh House, on the north west side of Warwick Way. The flats are in private grounds but the mark can be seen from the public path in Warwick Way.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/27/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into a brick wall on the south west side of Ebury Bridge close to the entrance to the railway maintenance entrance.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/27/2014

last visited: never

Image for Cut Bench Mark - Bowling Green Lane, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Bowling Green Lane, London, UK

in U.K. and Ireland Trigpoints

The mark is cut into the brickwork of a building on the south east side of Bowling Green Lane in Finsbury, London.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/26/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a building on the north west side of Lloyd Baker Street in Pentonville, London.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/26/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the face of a building in Hand Court right at the junction with Bedofrd Row.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/21/2014

last visited: never

Image for Benchmark, St Nicholas - Little Saxham, Suffolkview gallery
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U.K. and Ireland TrigpointsBenchmark, St Nicholas - Little Saxham, Suffolk

in U.K. and Ireland Trigpoints

Cut benchmark by the tower of St Nichiolas' church, Little Saxham

posted by: Groundspeak Premium Member SMacB

location: Eastern England, United Kingdom

date approved: 10/18/2014

last visited: never

Image for Benchmark, St John the Baptist - Needham Market, Suffolkview gallery
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U.K. and Ireland TrigpointsBenchmark, St John the Baptist - Needham Market, Suffolk

in U.K. and Ireland Trigpoints

Cut benchmark on south corner of St John the Baptist church, Needham Market

posted by: Groundspeak Premium Member SMacB

location: Eastern England, United Kingdom

date approved: 10/17/2014

last visited: never

Total Records: 5903 Page: 1 of 237 prev<<<[12345678910]>>>next
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