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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: 6704 Page: 1 of 269 prev<<<[12345678910]>>>next
Image for Flush Bracket - Devonedge, The Street, Charmouth, Dorsetview gallery
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U.K. and Ireland TrigpointsFlush Bracket - Devonedge, The Street, Charmouth, Dorset

in U.K. and Ireland Trigpoints

A Flush Bracket on the old Devonedge hotel which is now a hairdressers in The Street in Charmouth.

posted by: Groundspeak Premium Member Dragontree

location: South West England, United Kingdom

date approved: 3/23/2017

last visited: never

Image for Cut Mark and Rivet - The Old School, Lower Sea Lane, Charmouth, Dorsetview gallery
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U.K. and Ireland TrigpointsCut Mark and Rivet - The Old School, Lower Sea Lane, Charmouth, Dorset

in U.K. and Ireland Trigpoints

A Cut Mark on the old school building located along the road to the sea in Charmouth.

posted by: Groundspeak Premium Member Dragontree

location: South West England, United Kingdom

date approved: 3/23/2017

last visited: never

Image for Cut Bench Mark - St.Mary the Virgin, High Street, Whissonsett, Dereham, Norfolk. NR20 5APview gallery
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U.K. and Ireland TrigpointsCut Bench Mark - St.Mary the Virgin, High Street, Whissonsett, Dereham, Norfolk. NR20 5AP

in U.K. and Ireland Trigpoints

A slightly worn and lichen clad bench mark on this parish church.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 3/22/2017

last visited: never

Image for Cut Mark - Derelict Building on Lôn Felin Esgob, Bangor, Gwynedd, Walesview gallery
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U.K. and Ireland TrigpointsCut Mark - Derelict Building on Lôn Felin Esgob, Bangor, Gwynedd, Wales

in U.K. and Ireland Trigpoints

Cut mark: At the SE corner of derelict building on Lôn Felin Esgob, Bangor, Gwynedd, Wales.

posted by: Groundspeak Premium Member Meirion

location: North Wales, United Kingdom

date approved: 3/22/2017

last visited: never

Image for Bench Mark - St Withburga's Church, Holkham Hall Estate, Holkham, Norfolk. NR23 1RWview gallery
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U.K. and Ireland TrigpointsBench Mark - St Withburga's Church, Holkham Hall Estate, Holkham, Norfolk. NR23 1RW

in U.K. and Ireland Trigpoints

An almost pristine mark on the church tower buttress.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 3/22/2017

last visited: never

Image for Cut Mark - Boulder, Ciltwllan, Gwynedd, Walesview gallery
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U.K. and Ireland TrigpointsCut Mark - Boulder, Ciltwllan, Gwynedd, Wales

in U.K. and Ireland Trigpoints

Cut mark: On large boulder NE side of road at wall junction, Ciltwllan, Gwynedd, Wales.

posted by: Groundspeak Premium Member Meirion

location: North Wales, United Kingdom

date approved: 3/22/2017

last visited: never

Image for Horse Head Yorkshire Dalesview gallery
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U.K. and Ireland TrigpointsHorse Head Yorkshire Dales

in U.K. and Ireland Trigpoints

Trig Pillar on Horse Head Moor

posted by: Groundspeak Premium Member fitzydan

location: Yorkshire, United Kingdom

date approved: 3/22/2017

last visited: 3/23/2017

Image for Bench Mark - St Mary's Church, Church Road, North Creake, Norfolk, NR21 9JJview gallery
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U.K. and Ireland TrigpointsBench Mark - St Mary's Church, Church Road, North Creake, Norfolk, NR21 9JJ

in U.K. and Ireland Trigpoints

Slightly damaged by lichen, but still very visible.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 3/8/2017

last visited: never

Image for Cut Mark: St Peters Church - Stoke-on-Trent, Staffordshire, UK.view gallery
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U.K. and Ireland TrigpointsCut Mark: St Peters Church - Stoke-on-Trent, Staffordshire, UK.

in U.K. and Ireland Trigpoints

A cut mark on St Peters-ad-Vincula Church in Stoke.

posted by: Groundspeak Premium Member Poole/Freeman

location: West Midlands, United Kingdom

date approved: 3/8/2017

last visited: never

Image for CBM - Medway Road - Gillingham - Kentview gallery
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U.K. and Ireland TrigpointsCBM - Medway Road - Gillingham - Kent

in U.K. and Ireland Trigpoints

A cut bench mark close to the rail bridge on Medway Road

posted by: Groundspeak Premium Member dave-harris

location: South East England, United Kingdom

date approved: 3/8/2017

last visited: never

Image for Cut Mark - Old School House, Rachub, Gwynedd, Walesview gallery
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U.K. and Ireland TrigpointsCut Mark - Old School House, Rachub, Gwynedd, Wales

in U.K. and Ireland Trigpoints

Cut mark: On W face of old school house, Rachub, Gwynedd, Wales.

posted by: Groundspeak Premium Member Meirion

location: North Wales, United Kingdom

date approved: 3/8/2017

last visited: never

Image for Cut Mark - Wall on Farm Track, Ciltwllan, Gwynedd, Walesview gallery
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U.K. and Ireland TrigpointsCut Mark - Wall on Farm Track, Ciltwllan, Gwynedd, Wales

in U.K. and Ireland Trigpoints

Cut mark: On large boulder in stone wall on SW side of farm track, Ciltwllan, Gwynedd, Wales.

posted by: Groundspeak Premium Member Meirion

location: North Wales, United Kingdom

date approved: 3/8/2017

last visited: never

Image for Benchmark - All Saints - Ashbocking, Suffolkview gallery
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U.K. and Ireland TrigpointsBenchmark - All Saints - Ashbocking, Suffolk

in U.K. and Ireland Trigpoints

Cut benchmark on the north west corner of All Saints' church, Ashbocking.

posted by: Groundspeak Premium Member SMacB

location: Eastern England, United Kingdom

date approved: 3/7/2017

last visited: never

Image for Benchmark - St Mary - Gosbeck, Suffolkview gallery
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U.K. and Ireland TrigpointsBenchmark - St Mary - Gosbeck, Suffolk

in U.K. and Ireland Trigpoints

A very weathered cut benchmark on the south west corner of St Mary's church tower, Gosbeck.

posted by: Groundspeak Premium Member SMacB

location: Eastern England, United Kingdom

date approved: 3/7/2017

last visited: never

Image for Benchmark - St Gregory - Hemingstone, Suffolkview gallery
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U.K. and Ireland TrigpointsBenchmark - St Gregory - Hemingstone, Suffolk

in U.K. and Ireland Trigpoints

A cut benchmark on the northern corner of St Gregory's church tower.

posted by: Groundspeak Premium Member SMacB

location: Eastern England, United Kingdom

date approved: 3/7/2017

last visited: never

Image for Benchmark - St Peter - Henley, Suffolkview gallery
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U.K. and Ireland TrigpointsBenchmark - St Peter - Henley, Suffolk

in U.K. and Ireland Trigpoints

A cut benchmark on the north west corner of St Peter's church tower, Henley.

posted by: Groundspeak Premium Member SMacB

location: Eastern England, United Kingdom

date approved: 3/7/2017

last visited: never

Image for Benchmark - St Mary and St Peter - Barham, Suffolkview gallery
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U.K. and Ireland TrigpointsBenchmark - St Mary and St Peter - Barham, Suffolk

in U.K. and Ireland Trigpoints

A cut benchmark on the south east corner of St Mary & St Peter's church tower.

posted by: Groundspeak Premium Member SMacB

location: Eastern England, United Kingdom

date approved: 3/7/2017

last visited: never

Image for Benchmark - St Peter - Claydon, Suffolkview gallery
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U.K. and Ireland TrigpointsBenchmark - St Peter - Claydon, Suffolk

in U.K. and Ireland Trigpoints

A cut benchmark on the tower of St Peter's church, Claydon.

posted by: Groundspeak Premium Member SMacB

location: Eastern England, United Kingdom

date approved: 3/7/2017

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of a building on the south east side of Abbey Lane close to Abbey Mills pumping station and the Jubilee Line depot.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 3/3/2017

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the brickwork of Prioress House that is on the north west side of Bromley High Street. The mark is close to the south corner of the building on the south west face.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 3/3/2017

last visited: never

Image for Dilhorne - Stoke-on-Trent, Staffordshire.view gallery
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U.K. and Ireland TrigpointsDilhorne - Stoke-on-Trent, Staffordshire.

in U.K. and Ireland Trigpoints

A triangulation pillar located in Dilhorne, Stoke-on-Trent, Staffordshire.

posted by: Groundspeak Premium Member Poole/Freeman

location: West Midlands, United Kingdom

date approved: 2/23/2017

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into brickwork of a pedestrian foot tunnel, leading under railway lines, from Malmesbury Road to Mostyn Grove. The mark is at the southern end of the tunnel on the west side.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/21/2017

last visited: never

Image for Cut Mark with Rivet - Wick Lane, London, UKview gallery
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U.K. and Ireland TrigpointsCut Mark with Rivet - Wick Lane, London, UK

in U.K. and Ireland Trigpoints

This mark is cut into the top of a low concrete wall on the south west side of the A12 slip road adjacent to Wick Lane.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 2/21/2017

last visited: never

Image for Benchmark (2) - St John the Baptist - Belton, Leicestershireview gallery
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U.K. and Ireland TrigpointsBenchmark (2) - St John the Baptist - Belton, Leicestershire

in U.K. and Ireland Trigpoints

A cut benchmark on the west face of the north aisle, St John the Baptist church, Belton.

posted by: Groundspeak Premium Member SMacB

location: East Midlands, United Kingdom

date approved: 2/19/2017

last visited: never

Image for Benchmark - Church Lane - Hemington, Leicestershireview gallery
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U.K. and Ireland TrigpointsBenchmark - Church Lane - Hemington, Leicestershire

in U.K. and Ireland Trigpoints

Cut benchmark on a property in Church Lane, Hemington.

posted by: Groundspeak Premium Member SMacB

location: East Midlands, United Kingdom

date approved: 2/18/2017

last visited: never

Total Records: 6704 Page: 1 of 269 prev<<<[12345678910]>>>next
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