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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: 6595 Page: 1 of 264 prev<<<[12345678910]>>>next
Image for Cut Mark - St John's Church, Glastonbury, Somerset, England.view gallery
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U.K. and Ireland TrigpointsCut Mark - St John's Church, Glastonbury, Somerset, England.

in U.K. and Ireland Trigpoints

Cut mark: St John's Church S Face SW angle of tower, Glastonbury, Somerset, England.

posted by: Groundspeak Premium Member Meirion

location: South West England, United Kingdom

date approved: 9/26/2016

last visited: never

Image for Flush Bracket - St Benedict's Church, Glastonbury, Somerset, Englandview gallery
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U.K. and Ireland TrigpointsFlush Bracket - St Benedict's Church, Glastonbury, Somerset, England

in U.K. and Ireland Trigpoints

Flush Bracket: On E face at NE angle buttress of St Benedict's Church, Glastonbury, Somerset, England.

posted by: Groundspeak Premium Member Meirion

location: South West England, United Kingdom

date approved: 9/26/2016

last visited: never

Image for Cut Mark On Bridge 135 On Lancaster Canal - Borwick, UKview gallery
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U.K. and Ireland TrigpointsCut Mark On Bridge 135 On Lancaster Canal - Borwick, UK

in U.K. and Ireland Trigpoints

This Cut Mark is on the arch stones of bridge 135 that carries Borwick Lane over the canal.

posted by: Groundspeak Premium Member dtrebilc

location: Northwest England, United Kingdom

date approved: 9/26/2016

last visited: never

Image for Cut Mark On Bridge 134 On Lancaster Canal - Borwick, UKview gallery
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U.K. and Ireland TrigpointsCut Mark On Bridge 134 On Lancaster Canal - Borwick, UK

in U.K. and Ireland Trigpoints

This Cut Mark is on the arch stones of bridge 134 over the canal, an accommodation bridge for a nearby farm.

posted by: Groundspeak Premium Member dtrebilc

location: Northwest England, United Kingdom

date approved: 9/26/2016

last visited: never

Image for Cut Mark - Chilkwell Street, Glastonbury, Somerset, Englandview gallery
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U.K. and Ireland TrigpointsCut Mark - Chilkwell Street, Glastonbury, Somerset, England

in U.K. and Ireland Trigpoints

Cut mark: On the E side of Chilkwell Street opposite junction with Bere Lane, Glastonbury, Somerset, England.

posted by: Groundspeak Premium Member Meirion

location: South West England, United Kingdom

date approved: 9/26/2016

last visited: never

Image for Cut Mark On Bridge 138 On Lancaster Canal - Tewitfield, Ukview gallery
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U.K. and Ireland TrigpointsCut Mark On Bridge 138 On Lancaster Canal - Tewitfield, Uk

in U.K. and Ireland Trigpoints

This Cut Mark is on the arch stones of bridge 138 that carries Kellett Lane over the canal.

posted by: Groundspeak Premium Member dtrebilc

location: Northwest England, United Kingdom

date approved: 9/23/2016

last visited: never

Image for Cut Mark On Bridge 136 On The Lancaster Canal - Borwick, UKview gallery
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U.K. and Ireland TrigpointsCut Mark On Bridge 136 On The Lancaster Canal - Borwick, UK

in U.K. and Ireland Trigpoints

This Cut Mark is on the arch stones of bridge 136 over the canal, an accommodation bridge for a nearby farm.

posted by: Groundspeak Premium Member dtrebilc

location: Northwest England, United Kingdom

date approved: 9/23/2016

last visited: never

Image for Cut Mark On Bridge 131 On Lancaster Canal - Capernwray, UKview gallery
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U.K. and Ireland TrigpointsCut Mark On Bridge 131 On Lancaster Canal - Capernwray, UK

in U.K. and Ireland Trigpoints

This Cut Mark is on the arch stones of bridge 131, an accommodation bridge for a nearby farm over the canal.

posted by: Groundspeak Premium Member dtrebilc

location: Northwest England, United Kingdom

date approved: 9/23/2016

last visited: never

Image for Cut Mark - Town Hall, Glastonbury, Somerset, Englandview gallery
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U.K. and Ireland TrigpointsCut Mark - Town Hall, Glastonbury, Somerset, England

in U.K. and Ireland Trigpoints

Cut mark: On the S face of the town hall, Glastonbury, Somerset, England.

posted by: Groundspeak Premium Member Meirion

location: South West England, United Kingdom

date approved: 9/23/2016

last visited: never

Image for Flush Bracket - Town Hall, Glastonbury, Somerset, Englandview gallery
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U.K. and Ireland TrigpointsFlush Bracket - Town Hall, Glastonbury, Somerset, England

in U.K. and Ireland Trigpoints

Flush Bracket: On the S face of the town hall, Glastonbury, Somerset, England.

posted by: Groundspeak Premium Member Meirion

location: South West England, United Kingdom

date approved: 9/23/2016

last visited: never

Image for Cut Mark On Huddersfield Road Bridge 18 - Brighouse, UKview gallery
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U.K. and Ireland TrigpointsCut Mark On Huddersfield Road Bridge 18 - Brighouse, UK

in U.K. and Ireland Trigpoints

This cut mark is on the roadside parapet of Huddersfield Road Bridge over the Calder and Hebble Navigation.

posted by: Groundspeak Premium Member dtrebilc

location: Yorkshire, United Kingdom

date approved: 9/22/2016

last visited: never

Image for Cut Benchmark, St. Andrew, Presteigne, Walesview gallery
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U.K. and Ireland TrigpointsCut Benchmark, St. Andrew, Presteigne, Wales

in U.K. and Ireland Trigpoints

Cut Benchmark, St. Andrew's Church

posted by: Groundspeak Premium Member The_Senior_Crabbes

location: South Wales, United Kingdom

date approved: 9/20/2016

last visited: never

Image for Cut Mark - Cwmdauddwr Arms, Rhayader, Powys, Walesview gallery
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U.K. and Ireland TrigpointsCut Mark - Cwmdauddwr Arms, Rhayader, Powys, Wales

in U.K. and Ireland Trigpoints

Cut mark: On the SE face of the former Cwmdauddwr Arms on West Street, Rhayader, Powys, Wales.

posted by: Groundspeak Premium Member Meirion

location: South Wales, United Kingdom

date approved: 9/20/2016

last visited: never

Image for Flush Bracket - Castle Hotel, Rhayader, Powys, Walesview gallery
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U.K. and Ireland TrigpointsFlush Bracket - Castle Hotel, Rhayader, Powys, Wales

in U.K. and Ireland Trigpoints

Flush Bracket: On the SW face of the Castle Hotel on North Street, Rhayader, Powys, Wales.

posted by: Groundspeak Premium Member Meirion

location: South Wales, United Kingdom

date approved: 9/20/2016

last visited: never

Image for Flush Bracket - St Clement's Church, Rhayader, Powys, Walesview gallery
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U.K. and Ireland TrigpointsFlush Bracket - St Clement's Church, Rhayader, Powys, Wales

in U.K. and Ireland Trigpoints

Flush Bracket: On the SW angle of St Clement's Church, Rhayader, Powys, Wales.

posted by: Groundspeak Premium Member Meirion

location: South Wales, United Kingdom

date approved: 9/20/2016

last visited: never

Image for Cut Bench Mark - Clarence Gate Bridge, Regent's Park, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Clarence Gate Bridge, Regent's Park, London, UK

in U.K. and Ireland Trigpoints

This mark is located at the north east end of the Clarence Gate bridge in Regent's Park. It is on the north west side of the bridge, down a grassy embankment.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 9/20/2016

last visited: never

Image for Benchmark - St James - Bicknor, Kentview gallery
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U.K. and Ireland TrigpointsBenchmark - St James - Bicknor, Kent

in U.K. and Ireland Trigpoints

Cut benchmark on the south west corner of St James' church tower, Bicknor.

posted by: Groundspeak Premium Member SMacB

location: South East England, United Kingdom

date approved: 9/20/2016

last visited: never

Image for Rivet On Milestone On Lancaster Canal - Borwick, UKview gallery
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U.K. and Ireland TrigpointsRivet On Milestone On Lancaster Canal - Borwick, UK

in U.K. and Ireland Trigpoints

This rivet is on the top of a stone milestone next to a hedge on the tow path of the Lancaster Canal.

posted by: Groundspeak Premium Member dtrebilc

location: United Kingdom

date approved: 9/20/2016

last visited: never

Image for Rivet On Milestone On Lancaster Canal - Borwick, UKview gallery
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U.K. and Ireland TrigpointsRivet On Milestone On Lancaster Canal - Borwick, UK

in U.K. and Ireland Trigpoints

This rivet is on the top of a stone milestone next to a hedge on the tow path of the Lancaster Canal.

posted by: Groundspeak Premium Member dtrebilc

location: Northwest England, United Kingdom

date approved: 9/20/2016

last visited: never

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

in U.K. and Ireland Trigpoints

The mark is cut into the stonework of Primrose Hill Bridge. The mark is on the north east side of the bridge at its southern end over the canal bank.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 9/7/2016

last visited: never

Image for Benchmark - St Catherine - Kingsdown, Kentview gallery
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U.K. and Ireland TrigpointsBenchmark - St Catherine - Kingsdown, Kent

in U.K. and Ireland Trigpoints

Cut benchmark on the north face of St Catherine's church, Kingsdown.

posted by: Groundspeak Premium Member SMacB

location: South East England, United Kingdom

date approved: 9/7/2016

last visited: never

Image for Cut Mark - North-East Buttress, Holy Trinity Church, Stratford upon Avon, Warwickshire. CV37 9BGview gallery
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U.K. and Ireland TrigpointsCut Mark - North-East Buttress, Holy Trinity Church, Stratford upon Avon, Warwickshire. CV37 9BG

in U.K. and Ireland Trigpoints

A Cut Bench Mark on the north-east diagonal buttress of the chancel of this large parish church.

posted by: Groundspeak Premium Member greysman

location: West Midlands, United Kingdom

date approved: 9/7/2016

last visited: never

Image for Cut Bench Mark - King Edward Memorial Park, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - King Edward Memorial Park, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into stonework at the entrance to a ventilation shaft for the Rotherhithe Tunnel in east London. The shaft is in King Edward Memorial Park with the mark being near the entrance to the shaft on its north west side.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 9/7/2016

last visited: never

Image for 1GL/PA Bolt, No.46, Ely Street, Stratford upon Avon, Warwickshire. CV37 6LNview gallery
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U.K. and Ireland Trigpoints1GL/PA Bolt, No.46, Ely Street, Stratford upon Avon, Warwickshire. CV37 6LN

in U.K. and Ireland Trigpoints

Only listed as a cut bench mark in the Benchmark locator it has a bolt in the mark making it a 1GL/PA Bolt and cut benchmark.

posted by: Groundspeak Premium Member greysman

location: West Midlands, United Kingdom

date approved: 9/7/2016

last visited: never

Image for Cut Mark - The Swan's Nest, Bridgefoot, Stratford-upon-Avon. CV37 7LTview gallery
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U.K. and Ireland TrigpointsCut Mark - The Swan's Nest, Bridgefoot, Stratford-upon-Avon. CV37 7LT

in U.K. and Ireland Trigpoints

A suspect cut-mark on the platt band of the rubble plinth of this C17th building.

posted by: Groundspeak Premium Member greysman

location: West Midlands, United Kingdom

date approved: 9/7/2016

last visited: never

Total Records: 6595 Page: 1 of 264 prev<<<[12345678910]>>>next
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