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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: 5881 Page: 1 of 236 prev<<<[12345678910]>>>next
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

Image for Benchmark, Treveighan Methodist Church - Treveighan, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, Treveighan Methodist Church - Treveighan, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark on a stone outside the Treveighan Methodist Church, Michaelstow.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 10/16/2014

last visited: never

Image for Flush bracket, St James the Great, 12015 - Kilkhampton, Cornwallview gallery
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U.K. and Ireland TrigpointsFlush bracket, St James the Great, 12015 - Kilkhampton, Cornwall

in U.K. and Ireland Trigpoints

Flush bracket, 12015, on the church tower. West face, South west angle

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 10/16/2014

last visited: never

Image for Cut Mark On York House - Bradford, UKview gallery
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U.K. and Ireland TrigpointsCut Mark On York House - Bradford, UK

in U.K. and Ireland Trigpoints

This Ordnance Survey Cut Mark is on the corner of York House, built in 1866 as a gentleman's club.

posted by: Groundspeak Premium Member dtrebilc

location: Yorkshire, United Kingdom

date approved: 10/10/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the painted brickwork of a building on the south east side of Rosebery Avenue.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/10/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a curved wall on the south east side of Corporation Row at the junction with Woodbridge Street.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/10/2014

last visited: never

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

in U.K. and Ireland Trigpoints

The mark is cut into the brickwork of a building on the north west side of Rawstorne Street abd the junction with St John Street.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/10/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into stonework of the former Finsbury Town Hall on the south east side of Rosebery Avenue. The stonework surrounds the main entrance with the mark being to the right.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/10/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the stonework of the New River Head building on the north west side of Rosebery Avenue.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/10/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into a brick gate post on the north west side of Clerkenwell Green. The entry leads into St James's churchyard.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/8/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into brick and is located on the east side of Sekforde Street at the junction with Woodbridge Street.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/8/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into concrete on the north west side of Rosebery Avenue. It is adjacent to the northern end of the bridge that crosses Warner Street.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/8/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the end wall brickwork of a garage block on the south west side of Central Street at Cotswold Court.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/6/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into a brick wall on the north east side of Ironmonger Row opposite the public baths.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/4/2014

last visited: never

Image for Cut Bench Mark - Central Street, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Central 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 Central Street opposite Dingley Road.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/4/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a buttress on the south face of St Monica's Church at the northern end of Hoxton Square. The mark is on the buttress to the left of the main doorway.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/2/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into a brick post on the east side of Hoxton Street at the southern boundary of Hoxton House.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/2/2014

last visited: never

Image for Flush Bracket - Shoreditch Town Hall, Old Street, London, UKview gallery
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U.K. and Ireland TrigpointsFlush Bracket - Shoreditch Town Hall, Old Street, London, UK

in U.K. and Ireland Trigpoints

This flush bracket is on the west face of Shoreditch Town Hall. A passage runs from Old Street down the west side of the Town Hall and there are gates meaning that the FB is not always accessible and it is sometimes hidden behind rubbish.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/2/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into a post at the south east corner of Aske Gardens on the west side of Pifield Street. The mark and bolt are on the east face of the post.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/1/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the north west face of the plinth of a memorial column/fountain on the north east side of Paul Street.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/1/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into brickwork of The Old King's Head public house on the north west side of Holywell Row in Shoreditch.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/1/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into brickwork, at the western end of The White Hart public house on the north east side of Bear Lane. The mark is partly concealed by a waste bin.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 10/1/2014

last visited: never

Image for Cut Mark, Layer Brook Bridge, Factory Hill, Tiptree, Essesx. CO5 0RQview gallery
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U.K. and Ireland TrigpointsCut Mark, Layer Brook Bridge, Factory Hill, Tiptree, Essesx. CO5 0RQ

in U.K. and Ireland Trigpoints

A well defined cut-mark on the parapet of the road bridge over the Layer Brook.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 9/30/2014

last visited: never

Total Records: 5881 Page: 1 of 236 prev<<<[12345678910]>>>next
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