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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: 6907 Page: 1 of 277 prev<<<[12345678910]>>>next
Image for O.S. Triangulation Pillar - Cairn-mon-earn, Aberdeenshire.view gallery
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U.K. and Ireland TrigpointsO.S. Triangulation Pillar - Cairn-mon-earn, Aberdeenshire.

in U.K. and Ireland Trigpoints

Ordnance Survey trig pillar on the 378 metre summit of Cairn-mon-earn in Durris Forest at the eastern extremity of the Grampian Mountains.

posted by: Groundspeak Regular Member creg-ny-baa

location: Northern Scotland, United Kingdom

date approved: 10/17/2017

last visited: never

Image for Flush Bracket - Church of St.Margaret of Antioch, Stanford-le-Hope, The Green, Stanford-le-Hope, Essex, SS17 0BYview gallery
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U.K. and Ireland TrigpointsFlush Bracket - Church of St.Margaret of Antioch, Stanford-le-Hope, The Green, Stanford-le-Hope, Essex, SS17 0BY

in U.K. and Ireland Trigpoints

This slightly worn flush bracket is on the north face of the chancel of this old church.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 10/17/2017

last visited: never

Image for Cut Bench Mark - Church of St.Margaret of Antioch, Stanford-le-Hope, The Green, Stanford-le-Hope, Essex, SS17 0BYview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Church of St.Margaret of Antioch, Stanford-le-Hope, The Green, Stanford-le-Hope, Essex, SS17 0BY

in U.K. and Ireland Trigpoints

An almost pristine cut mark on the east face at the south-east angle of the old church.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 10/17/2017

last visited: never

Image for Church of St.Giles and All Saints, High Road, Orsett, Essex. RM16 3ERview gallery
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U.K. and Ireland TrigpointsChurch of St.Giles and All Saints, High Road, Orsett, Essex. RM16 3ER

in U.K. and Ireland Trigpoints

A neat cut mark on the south face of the south aisle, west end.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 10/17/2017

last visited: never

Image for Cut Bench Mark - Wells Town Hall.view gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Wells Town Hall.

in U.K. and Ireland Trigpoints

A cut bench mark on the Town Hall, City of Wells.

posted by: Groundspeak Premium Member MeerRescue

location: South West England, United Kingdom

date approved: 10/13/2017

last visited: never

Image for Cut Mark On River Calder Railway Bridge - Bradley, UKview gallery
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U.K. and Ireland TrigpointsCut Mark On River Calder Railway Bridge - Bradley, UK

in U.K. and Ireland Trigpoints

This cut mark is on the base of a railway bridge that carries the Calder Valley Railway Line over the River Calder.

posted by: Groundspeak Premium Member dtrebilc

location: Yorkshire, United Kingdom

date approved: 10/13/2017

last visited: never

Image for Benchmark - St Peter - Swallowcliffe, Wiltshireview gallery
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U.K. and Ireland TrigpointsBenchmark - St Peter - Swallowcliffe, Wiltshire

in U.K. and Ireland Trigpoints

A cut benchmark on the south corner of St Peter's church, Swallowcliffe.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 10/13/2017

last visited: never

Image for Cut Bench Mark - Old Post Office, High Street, Bathampton.view gallery
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U.K. and Ireland TrigpointsCut Bench Mark - Old Post Office, High Street, Bathampton.

in U.K. and Ireland Trigpoints

A cut bench mark on the wall of the Old Post Office in Bathampton.

posted by: Groundspeak Premium Member MeerRescue

location: South West England, United Kingdom

date approved: 10/13/2017

last visited: never

Image for Benchmark - St James - Ansty, Wiltshireview gallery
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U.K. and Ireland TrigpointsBenchmark - St James - Ansty, Wiltshire

in U.K. and Ireland Trigpoints

Cut benchmark on the north east corner of St James' church, Ansty.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 10/11/2017

last visited: never

Image for Benchmark - St James - St Kew, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark - St James - St Kew, Cornwall

in U.K. and Ireland Trigpoints

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

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 10/11/2017

last visited: never

Image for O.S. Triangulation Pillar - Fothringham Hill, Angus.view gallery
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U.K. and Ireland TrigpointsO.S. Triangulation Pillar - Fothringham Hill, Angus.

in U.K. and Ireland Trigpoints

Ordnance Survey trig pillar on the summit area of Fothringham Hill, 3 miles south of the town of Forfar in the county of Angus.

posted by: Groundspeak Regular Member creg-ny-baa

location: Northern Scotland, United Kingdom

date approved: 10/9/2017

last visited: never

Image for Benchmark - Bell Street United Church - Shaftesbury, Dorsetview gallery
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U.K. and Ireland TrigpointsBenchmark - Bell Street United Church - Shaftesbury, Dorset

in U.K. and Ireland Trigpoints

Cut benchmark on the south east corner of Bell Street United Church, Shaftesbury.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 10/6/2017

last visited: never

Image for Benchmark - Salisbury Street - Shaftesbury, Dorsetview gallery
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U.K. and Ireland TrigpointsBenchmark - Salisbury Street - Shaftesbury, Dorset

in U.K. and Ireland Trigpoints

A cut benchmark on a private dwelling, Salisbury Street, Shaftesbury.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 10/6/2017

last visited: never

Image for Old Railway Bridge, track off Langford Road - B1018, Wickham Bishops, Essex.view gallery
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U.K. and Ireland TrigpointsOld Railway Bridge, track off Langford Road - B1018, Wickham Bishops, Essex.

in U.K. and Ireland Trigpoints

A cut mark with rivet on a three-arch railway bridge over the now defunct Witham to Maldon Railway.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 10/1/2017

last visited: never

Image for Flush Bracket S2515 - Town Hall - Shaftesbury, Dorsetview gallery
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U.K. and Ireland TrigpointsFlush Bracket S2515 - Town Hall - Shaftesbury, Dorset

in U.K. and Ireland Trigpoints

Flush Bracket S2515 on the north east angle of the Town Hall, Shaftesbury.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 10/1/2017

last visited: never

Image for Old Railway Bridge, Station Road - B1018, Wickham Bishops, Essex.view gallery
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U.K. and Ireland TrigpointsOld Railway Bridge, Station Road - B1018, Wickham Bishops, Essex.

in U.K. and Ireland Trigpoints

A poorly defined cut mark on railway bridge WIM 865 of the defunct Witham to Maldon railway.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 10/1/2017

last visited: never

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

in U.K. and Ireland Trigpoints

A cut benchmark on St Mary's church, Iwerne Courtney.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 9/30/2017

last visited: never

Image for O.S. Triangulation Pillar - Kinnoull Hill, Perth & Kinross.view gallery
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U.K. and Ireland TrigpointsO.S. Triangulation Pillar - Kinnoull Hill, Perth & Kinross.

in U.K. and Ireland Trigpoints

Ordnance Survey trig pillar, constructed in 1950, on the summit of Kinnoull Hill, a craggy, wooded height on the east side of the city of Perth.

posted by: Groundspeak Regular Member creg-ny-baa

location: Northern Scotland, United Kingdom

date approved: 9/30/2017

last visited: never

Image for Flush Bracket, 100045 - St Mary - Iwerne Minster, Dorsetview gallery
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U.K. and Ireland TrigpointsFlush Bracket, 100045 - St Mary - Iwerne Minster, Dorset

in U.K. and Ireland Trigpoints

Flush bracket 10045 on the south face of St Mary's church, Iwerne Minster.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 9/27/2017

last visited: never

Image for Benchmark - St Bartholomew - Sutton Waldron, Dorsetview gallery
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U.K. and Ireland TrigpointsBenchmark - St Bartholomew - Sutton Waldron, Dorset

in U.K. and Ireland Trigpoints

Cut benchmark at the north west angle of the nave, at the junction with the tower of St Bartholomew'c church, Sutton Waldron.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 9/25/2017

last visited: never

Image for Benchmark - St Andrew - Fontmell Magna, Dorsetview gallery
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U.K. and Ireland TrigpointsBenchmark - St Andrew - Fontmell Magna, Dorset

in U.K. and Ireland Trigpoints

Cut benchmark on the south face of St Andrew's church tower, Fontmell Magna.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 9/24/2017

last visited: never

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

in U.K. and Ireland Trigpoints

A cut benchmark on the west end of St Mary's church, Compton Abbas.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 9/24/2017

last visited: never

Image for Benchmark - St John the Baptist - Charlton, Wiltshireview gallery
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U.K. and Ireland TrigpointsBenchmark - St John the Baptist - Charlton, Wiltshire

in U.K. and Ireland Trigpoints

Cut benchmark on the south east corner of St John the Baptist church, Charlton (Donhead St Mary).

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 9/24/2017

last visited: never

Image for Benchmark - St Andrew - Donhead St Andrew, Wiltshireview gallery
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U.K. and Ireland TrigpointsBenchmark - St Andrew - Donhead St Andrew, Wiltshire

in U.K. and Ireland Trigpoints

A cut benchmark on the south west corner of St Andrew's church, Donhead St Andrew.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 9/24/2017

last visited: never

Image for PA Bolt - St Mael & St Sulien's Church, Corwen, Denbighshire, Walesview gallery
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U.K. and Ireland TrigpointsPA Bolt - St Mael & St Sulien's Church, Corwen, Denbighshire, Wales

in U.K. and Ireland Trigpoints

PA Bolt: On NW face OF St Mael and St Sulien's church, Corwen, Denbighshire, Wales.

posted by: Groundspeak Regular Member Meirion

location: North Wales, United Kingdom

date approved: 9/21/2017

last visited: never

Total Records: 6907 Page: 1 of 277 prev<<<[12345678910]>>>next
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