U.K. and Ireland Trigpoints - A Waymarking.com Category

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U.K. and Ireland Trigpoints

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UK And Ireland Trigpoints Managers

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.)
1GL 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.
CUT BENCHMARK A cut mark in stone/brick. Some have been found upside-down.
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.
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.
FLUSH BRACKET. These can be found on trig pillars, buildings, bridges etc. They all have an individual number, which you should log.
SURFACE BLOCK. A rivet set in a concrete base about 6 inches across (15cm) flush at ground level.
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.
PIVOT BENCH MARKS. A benchmark which has an empty hole above it. There is no horizontal mark.
PROJECTING BRACKET. These brackets are the predecessor to the Flush Bracket. 258 listed on OSBM.
BERNTSEN. Visible is a metal circular lid about 6 inches across (15cm) at ground level, covering a brass bolt.
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.
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
ACTIVE STATIONS contain a GPS receiver antenna and sometimes meteorological instruments. Active Station Map. (Not publicly listed by OS.) Find an Active Station.
CONCRETE RING with a centre stud. 2 feet (55cm) diameter. 6 known in the UK.
(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.
CENTRE is a small cross engraved in metal. There are 2 known in the UK.
GRAVITY FBM. Similar to a standard FBM, but bigger, and with a flush bracket. 4 known in the UK.
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.
Other survey marks.
ADMIRALTY HYDROGRAPHIC DEPARTMENT LEVEL MARKER. These markers are flat and about 6 inches across (15cm) , set in rock.
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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view gallery	Cut Mark with Rivet - Hampton Court Road, Hampton Court, Surrey, UK in U.K. and Ireland Trigpoints This rivet and cut mark are on the south side of Hampton Court Road at the Lion Gates entrance to the grounds of Hampton Court Palace. The rivet is at the base of west pillar that supports the gates. posted by: Master Mariner location: London, United Kingdom date approved: 4/23/2015 last visited: never
view gallery	Cut Mark with Rivet - Bushy Park, London, UK in U.K. and Ireland Trigpoints Chestnut Avenue passes through Bushy Park in a roughly north/south direction. Towards the southern end there is a pond that has a fountain named "Diana". On the west edge of the pond there is a small wall, possibly a seat, where the rivet is located. posted by: Master Mariner location: London, United Kingdom date approved: 4/23/2015 last visited: never
view gallery	Cut Bench Mark - Hampton Court Bridge, London, UK in U.K. and Ireland Trigpoints This mark is cut into the base of one of the pillars at the Trophy Gates entrance to Hampton Court Palace and Gardens on the south east side of Hampton Court Bridge at its northern end. posted by: Master Mariner location: London, United Kingdom date approved: 4/23/2015 last visited: never
view gallery	Cut Bench Mark - Albany Reach, London, UK in U.K. and Ireland Trigpoints This mark is cut into the brickwork of a small building on the south west side of the footpath that runs alongside Albany Reach at Hampton Court. posted by: Master Mariner location: London, United Kingdom date approved: 4/23/2015 last visited: never
view gallery	Cut Bench Mark - Feltham Avenue, East Molesey, Surrey, UK in U.K. and Ireland Trigpoints This mark is cut into the brickwork of a building on the south east side of Feltham Avenue at the junction with River Bank close to Molesley Lock. posted by: Master Mariner location: South East England, United Kingdom date approved: 4/22/2015 last visited: never
view gallery	Flush Bracket - Ewell Road, Surbiton, London, UK in U.K. and Ireland Trigpoints The flush bracket is attached to the wall of a brick building on the north east side of Ewell Road close to the junction with Broomfield Road. posted by: Master Mariner location: London, United Kingdom date approved: 4/21/2015 last visited: never
view gallery	Cut Bench Mark - Ewell Road, Surbiton, London, UK in U.K. and Ireland Trigpoints This mark is cut into the brickwork of a building on the north east side of Ewell Road just north of the Surbiton Hill Methodist church. posted by: Master Mariner location: London, United Kingdom date approved: 4/20/2015 last visited: never
view gallery	Cut Bench Mark - Ewell Road, Surbiton, London, UK in U.K. and Ireland Trigpoints This mark is cut into the brickwork of a building on the north east side of Ewell Road at the junction with Berrylands Road. posted by: Master Mariner location: London, United Kingdom date approved: 4/20/2015 last visited: never
view gallery	Cut Bench Mark - Ewell Road, Surbiton, London, UK in U.K. and Ireland Trigpoints This mark is cut into the brickwork of a bridge parapet on the west side of Ewell Road. The bridge crosses mainline railway tracks and the mark is near the centre of the bridge. posted by: Master Mariner location: London, United Kingdom date approved: 4/20/2015 last visited: never
view gallery	Benchmark, St David - Davidstow, Cornwall in U.K. and Ireland Trigpoints Cut benchmark on south west angle, south face of church tower. St David's, Davidstow. posted by: SMacB location: South West England, United Kingdom date approved: 4/15/2015 last visited: never
view gallery	Benchmark, St Mary Almer - Almer, Dorset in U.K. and Ireland Trigpoints Cut benchmark on south east face, south angle of church tower, St Mary's, Almer. posted by: SMacB location: Southern England, United Kingdom date approved: 4/15/2015 last visited: never
view gallery	Benchmark , St Laurence - Affpuddle, Dorset in U.K. and Ireland Trigpoints Cut benchmark on south west angle of church tower, St Laurence, Affpuddle. posted by: SMacB location: Southern England, United Kingdom date approved: 4/15/2015 last visited: never
view gallery	Benchmark, Holy Trinity - West Lulworth, Dorset in U.K. and Ireland Trigpoints Cut benchmark on north west face of Holy Trinity church, West Lulworth. posted by: SMacB location: Southern England, United Kingdom date approved: 4/14/2015 last visited: never
view gallery	Benchmark and 1GL bolt, St Michael - Owermoigne, Dorset in U.K. and Ireland Trigpoints Cut benchmark and 1GL Bolt in South-west angle of St Michael's church, Owermoigne ; 2.84 ft. above surface. posted by: SMacB location: Southern England, United Kingdom date approved: 4/12/2015 last visited: never
view gallery	Benchmark - St George - Langton Matravers, Dorset in U.K. and Ireland Trigpoints Cut benchmark on the south west corner of St George's church, Langton Matravers posted by: SMacB location: Southern England, United Kingdom date approved: 4/10/2015 last visited: never
view gallery	Benchmark - Miles & Son, Station Road - Swanage, Dorset in U.K. and Ireland Trigpoints Cut benchmark on Miles & Son estate agents, Station Road, Swanage. posted by: SMacB location: Southern England, United Kingdom date approved: 4/9/2015 last visited: never
view gallery	Benchmark - Weyfish Ltd, Custom House Quay - Weymouth, Dorset in U.K. and Ireland Trigpoints Cut benchmark on Weyfish Ltd premises, Custom House Quay, Weymouth. posted by: SMacB location: Southern England, United Kingdom date approved: 4/9/2015 last visited: never
view gallery	Cut Bench Mark - Leicester Court, London, UK in U.K. and Ireland Trigpoints This mark is cut into the brickwork of a building on the north east side of Leicester Court close to the junction with Cranbourn Street. posted by: Master Mariner location: London, United Kingdom date approved: 4/6/2015 last visited: never
view gallery	Cut-mark, St Mary's Church, Earl Stonham, Suffolk, IP14 5EE in U.K. and Ireland Trigpoints St Mary's, Earl Stonham, is on the A1120 between Forward Green and the A140 at Earl Stonham. This is a well preserved cut-mark on the base of the tower. posted by: greysman location: Eastern England, United Kingdom date approved: 3/30/2015 last visited: never
view gallery	Cut Mark, Church St.Mary the Virgin, The Causeway, Walsham le Willows, Suffolk. IP31 3AA. in U.K. and Ireland Trigpoints Worn but legible on the east face of the south-east tower buttress. posted by: greysman location: Eastern England, United Kingdom date approved: 3/30/2015 last visited: never
view gallery	St Johns Church Taunton in U.K. and Ireland Trigpoints Cut bench mark on church posted by: dave.johnson location: South West England, United Kingdom date approved: 3/26/2015 last visited: never
view gallery	Taunton Crown Court. Cut bench mark in U.K. and Ireland Trigpoints Cut Bench mark on court building posted by: dave.johnson location: South West England, United Kingdom date approved: 3/26/2015 last visited: never
view gallery	Hare Farm Cut Bench Mark, Hare Lane, Broadway, Devon in U.K. and Ireland Trigpoints Cut Bench Mark posted by: dave.johnson location: South West England, United Kingdom date approved: 3/25/2015 last visited: 3/26/2015
view gallery	Benchmark, St John the Baptist - Muston, Leicestershire in U.K. and Ireland Trigpoints Cut benchmark on north west angle of St John the Baptist church tower, Muston. posted by: SMacB location: East Midlands, United Kingdom date approved: 3/24/2015 last visited: never
view gallery	Benchmark & PA Bolt - St Lawrence - Sedgebrook, Lincolnshire in U.K. and Ireland Trigpoints Cut benchmark and PA bolt, west face, north west angle of St Lawrence church tower, Sedgebrook. posted by: SMacB location: East Midlands, United Kingdom date approved: 3/23/2015 last visited: never

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