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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: 5748 Page: 1 of 230 prev<<<[12345678910]>>>next
Image for Rivet - Sea Wall, Pensarn, Conwy, Walesview gallery
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U.K. and Ireland TrigpointsRivet - Sea Wall, Pensarn, Conwy, Wales

in U.K. and Ireland Trigpoints

Rivet: On sea wall on the N side of path in Pensarn, Conwy, Wales.

posted by: Groundspeak Premium Member Meirion

location: North Wales, United Kingdom

date approved: 4/21/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into a low wall that is on the south west side of Belgrave Square. The wall is topped with railings.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 4/19/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into the stomework of a building on the north east side of Sloane Street.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 4/19/2014

last visited: never

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

in U.K. and Ireland Trigpoints

This mark is cut into brick and is located on the north side of Stackhouse Street

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 4/19/2014

last visited: never

Image for Intersected Station, St Austell Brewery Tower Centre - St Austell, Cornwallview gallery
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U.K. and Ireland TrigpointsIntersected Station, St Austell Brewery Tower Centre - St Austell, Cornwall

in U.K. and Ireland Trigpoints

Intersected station, St Austell brewery tower, St Austell.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/10/2014

last visited: never

Image for Cut Bench Mark & Bolt - Lincoln's Inn Field, London, UKview gallery
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U.K. and Ireland TrigpointsCut Bench Mark & Bolt - Lincoln's Inn Field, London, UK

in U.K. and Ireland Trigpoints

This mark is located on the east side of Lincoln's Inn Field immediately to the north of the entrance to Lincoln's Inn.

posted by: Groundspeak Premium Member Master Mariner

location: London, United Kingdom

date approved: 4/10/2014

last visited: never

Image for Benchmark, St Gennys church - St Gennys, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, St Gennys church - St Gennys, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark on St Gennys church tower, St Gennys. South West angle.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/9/2014

last visited: never

Image for Benchmark, Paradise House, Paradise Road - Boscastle, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, Paradise House, Paradise Road - Boscastle, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark on left hand gatepost at entrance to Paradise House driveway, Paradise Road, Boscastle.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/9/2014

last visited: never

Image for Benchmark, Tintagel Road - Boscastle, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, Tintagel Road - Boscastle, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark on Tintagel Road, Boscastle.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/9/2014

last visited: never

Image for Benchmark, Under Road - Boscastle, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, Under Road - Boscastle, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark on gatepost at the western (B3263) end of Under Road, Boscastle.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

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

in U.K. and Ireland Trigpoints

Cut benchmark on Tintagel Methodist church, Bossiney Road, Tintagel.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

Image for Benchmark, Condolden - Tintagel, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, Condolden - Tintagel, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark at base of marker stone at 'T' junction near Trewinnick Farm, Tintagel.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

Image for Benchmark, Hillsborough -  Boscastle, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, Hillsborough - Boscastle, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark in gatepost opposite Hillsborough Farm on B3263, Hillsborough, Boscastle.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

Image for Benchmark, Pentargon footpath - Boscastle, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, Pentargon footpath - Boscastle, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark on B3263. The start of the footpath to Pentargon, on the North Cornwall Coastpath.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

Image for Benchmark, Penally Hill - Boscastle, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, Penally Hill - Boscastle, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark on garages, Penally Hill, Boscastle.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

Image for Benchmark, Tresuck - Hillsborough, Boscastle, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, Tresuck - Hillsborough, Boscastle, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark in drystone wall on B3263. Hillsborough, Boscastle.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

Image for Triangulation Pillar S5692: Trewannion Down - A39, Nr. Davidstow, Cornwallview gallery
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U.K. and Ireland TrigpointsTriangulation Pillar S5692: Trewannion Down - A39, Nr. Davidstow, Cornwall

in U.K. and Ireland Trigpoints

Triangulation Pillar in a field just off the A39 near to a NATS aerial compound.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

Image for Triangulation Pillar S5610: Lane End Field - Nr. Tregadillett, Cornwallview gallery
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U.K. and Ireland TrigpointsTriangulation Pillar S5610: Lane End Field - Nr. Tregadillett, Cornwall

in U.K. and Ireland Trigpoints

Triangulation Pillar just off the A395 near Tregadillett, Launceston

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

Image for Fundamental Bench Mark - Boscastle, Cornwallview gallery
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U.K. and Ireland TrigpointsFundamental Bench Mark - Boscastle, Cornwall

in U.K. and Ireland Trigpoints

FBM on B3263 road to Boscastle, Nr. the hamlet of Tresparrett Posts. Height plate is missing.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

Image for Benchmark, St. Symphorian - Boscastle, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, St. Symphorian - Boscastle, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark on St Symphorian church tower, South West corner, South face.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

Image for Benchmark - Hendraburnick Down, A39, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark - Hendraburnick Down, A39, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark on an old finger post at Hendraburnick Down on the A39.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

Image for Benchmark, Tresuck Farm - Hillsborough, Boscastle, Cornwallview gallery
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U.K. and Ireland TrigpointsBenchmark, Tresuck Farm - Hillsborough, Boscastle, Cornwall

in U.K. and Ireland Trigpoints

Cut benchmark on gatepost on B3263. Hillsborough, Boscastle.

posted by: Groundspeak Premium Member SMacB

location: South West England, United Kingdom

date approved: 4/8/2014

last visited: never

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

in U.K. and Ireland Trigpoints

Cut benchmark, All Saints' church tower, on south face of south east buttress.

posted by: Groundspeak Premium Member SMacB

location: Eastern England, United Kingdom

date approved: 4/1/2014

last visited: never

Image for Benchmark, St Michael the Archangel - Framlingham, Suffolkview gallery
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U.K. and Ireland TrigpointsBenchmark, St Michael the Archangel - Framlingham, Suffolk

in U.K. and Ireland Trigpoints

Cut benchmarkmark on corner stone, approximately 30 cm above ground level, on the south-east buttress of the church.

posted by: Groundspeak Premium Member SMacB

location: Eastern England, United Kingdom

date approved: 3/31/2014

last visited: never

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

in U.K. and Ireland Trigpoints

Cut benchmark on church tower, north west butress, north face.

posted by: Groundspeak Premium Member SMacB

location: Eastern England, United Kingdom

date approved: 3/31/2014

last visited: never

Total Records: 5748 Page: 1 of 230 prev<<<[12345678910]>>>next
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