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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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Total Records: 2089 Page: 1 of 84 prev<<<[12345678910]>>>next
Image for Stuck in a field, Trig Point, off Highfields Lane, Tiptree, Essex.view gallery

here0 km

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U.K. and Ireland TrigpointsStuck in a field, Trig Point, off Highfields Lane, Tiptree, Essex.

in U.K. and Ireland Trigpoints

On the parish border between Tiptree and Messing-Cum-Inworth in rural Essex.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 4/6/2012

last visited: never

Image for Jam Factory Cut-Mark, Wilkin & Sons Ltd. factory gate, Factory Hill, Tiptree, Essex.view gallery

SESE2.6 km

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U.K. and Ireland TrigpointsJam Factory Cut-Mark, Wilkin & Sons Ltd. factory gate, Factory Hill, Tiptree, Essex.

in U.K. and Ireland Trigpoints

A cut-mark in good condition on the left-hand supporting pillar of the original gateway.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 7/1/2012

last visited: never

Image for Church of St Mary the Virgin, Layer Marney, Essex. CO5 9UR.view gallery

EE5 km

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U.K. and Ireland TrigpointsChurch of St Mary the Virgin, Layer Marney, Essex. CO5 9UR.

in U.K. and Ireland Trigpoints

A time-worn Cut Mark on the south-west buttress of this C16th church.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 2/26/2014

last visited: never

Image for St.Peter's Church Porch Cut-mark, Goldhanger, Maldon, Essex.view gallery

SS8.7 km

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U.K. and Ireland TrigpointsSt.Peter's Church Porch Cut-mark, Goldhanger, Maldon, Essex.

in U.K. and Ireland Trigpoints

A slightly worn cut-mark on the west porch buttress of this village church.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 6/24/2013

last visited: never

Image for Cut-mark and Rivet, Roman River Bridge, London Road, Copford, Essex.view gallery

NENE9 km

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U.K. and Ireland TrigpointsCut-mark and Rivet, Roman River Bridge, London Road, Copford, Essex.

in U.K. and Ireland Trigpoints

A topless cut-mark with rivet on the London Road bridge over the Roman River.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 6/9/2013

last visited: never

Image for A Decorative Cut-mark, St.Andrew's Tower Buttress, Heybridge Street, Heybridge, Maldon, Essex.view gallery

SS9.3 km

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U.K. and Ireland TrigpointsA Decorative Cut-mark, St.Andrew's Tower Buttress, Heybridge Street, Heybridge, Maldon, Essex.

in U.K. and Ireland Trigpoints

This cut-mark has been inscribed into one of the decorative inserts on the large tower buttress.

posted by: Groundspeak Premium Member greysman

location: South East England, United Kingdom

date approved: 10/21/2013

last visited: never

Image for Canal Bridge Cut Mark, Heybridge, Maldon, Essex.view gallery

SS9.3 km

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U.K. and Ireland TrigpointsCanal Bridge Cut Mark, Heybridge, Maldon, Essex.

in U.K. and Ireland Trigpoints

A pristine cut mark on the Colchester Road bridge over the Chelmer and Blackwater canal at Heybridge.

posted by: Groundspeak Premium Member greysman

location: South East England, United Kingdom

date approved: 10/20/2013

last visited: never

Image for Flush Bracket, St.Mary's Church, Tollesbury, Essex.view gallery

SESE10.3 km

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U.K. and Ireland TrigpointsFlush Bracket, St.Mary's Church, Tollesbury, Essex.

in U.K. and Ireland Trigpoints

A Flush Bracket on the north-west buttress of the church tower.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 4/16/2012

last visited: never

Image for PA Bolt and Cut-mark, St.Mary's Arts Centre, Church Street, Colchester, Essex.view gallery

NENE13.8 km

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U.K. and Ireland TrigpointsPA Bolt and Cut-mark, St.Mary's Arts Centre, Church Street, Colchester, Essex.

in U.K. and Ireland Trigpoints

A nice PA Bolt and Cut-mark on the tower of St.Mary's Colchester Arts Centre.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 11/10/2011

last visited: never

Image for Cut-mark, The Old Post Office, Head Street, Colchester, Essex.view gallery

NENE14 km

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U.K. and Ireland TrigpointsCut-mark, The Old Post Office, Head Street, Colchester, Essex.

in U.K. and Ireland Trigpoints

A slightly unusual cut-mark, it has an elongated top bar, on the old Post Office building, now the Odeon Cinema.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 7/3/2013

last visited: never

Image for Cut-mark, St.Peter's Church Tower, North Hill, Colchester, Essexview gallery

NENE14.2 km

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U.K. and Ireland TrigpointsCut-mark, St.Peter's Church Tower, North Hill, Colchester, Essex

in U.K. and Ireland Trigpoints

A Cut-mark on the tower of this central Colchester church.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 4/14/2013

last visited: never

Image for PA Bolt and Cut-mark, St.John's Abbey Gatehouse, St Johns Green, Colchester, Essexview gallery

NENE14.2 km

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U.K. and Ireland TrigpointsPA Bolt and Cut-mark, St.John's Abbey Gatehouse, St Johns Green, Colchester, Essex

in U.K. and Ireland Trigpoints

A PA-bolt and cut-mark on the right-hand gate post of this C15th gatehouse.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 11/8/2011

last visited: 1/22/2013

Image for PA Bolt and Cut-mark, S.Giles Masonic Centre, St Johns Green, Colchester, Essexview gallery

NENE14.2 km

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U.K. and Ireland TrigpointsPA Bolt and Cut-mark, S.Giles Masonic Centre, St Johns Green, Colchester, Essex

in U.K. and Ireland Trigpoints

A slightly worn PA bolt and Cut-mark on St.Giles Church, now the Masonic Centre for Colchester.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 11/8/2011

last visited: never

Image for Tavener John Miller's Well Cut Mark, Middleborough, Colchester, Essex.view gallery

NENE14.2 km

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U.K. and Ireland TrigpointsTavener John Miller's Well Cut Mark, Middleborough, Colchester, Essex.

in U.K. and Ireland Trigpoints

A cut mark on the left pillar of this old well/drinking fountain in Colchester.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 10/30/2010

last visited: never

Image for Cut-mark, Colchester Town Hall, High Street, Colchester, Essex.view gallery

NENE14.3 km

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U.K. and Ireland TrigpointsCut-mark, Colchester Town Hall, High Street, Colchester, Essex.

in U.K. and Ireland Trigpoints

A well preserved cut-mark on the right-hand front corner of Colchester's Town Hall next to the foundation stone.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 11/9/2011

last visited: 1/22/2013

Image for PA Bolt and Cut-mark, St.Botolph's Church, St.Botolph's Church Walk, Colchester, Essexview gallery

NENE14.3 km

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U.K. and Ireland TrigpointsPA Bolt and Cut-mark, St.Botolph's Church, St.Botolph's Church Walk, Colchester, Essex

in U.K. and Ireland Trigpoints

A well preserved PA bolt and cut-mark on the fine Norman Revival church.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 11/8/2011

last visited: 1/22/2013

Image for Jaggers' Cut-mark, South Green Road, Fingringhoe, Essex.view gallery

EE15.9 km

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U.K. and Ireland TrigpointsJaggers' Cut-mark, South Green Road, Fingringhoe, Essex.

in U.K. and Ireland Trigpoints

A well preserved cut bench mark on an outbuilding of Jaggers, an C18th grade II listed farmhouse.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 11/3/2011

last visited: never

Image for Cut-Mark on buttress of St.Thomas's Church, Bradwell-on-Sea, Essex.view gallery

SESE16.3 km

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U.K. and Ireland TrigpointsCut-Mark on buttress of St.Thomas's Church, Bradwell-on-Sea, Essex.

in U.K. and Ireland Trigpoints

A worn cut-mark on the south face of St.Thomas's Church.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 2/21/2013

last visited: never

Image for Triangulation Pillar, Wick Lane, Fingringhoe, Essex.view gallery

EE16.4 km

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U.K. and Ireland TrigpointsTriangulation Pillar, Wick Lane, Fingringhoe, Essex.

in U.K. and Ireland Trigpoints

A trig pillar in very good condition overlooking the marshes of east Essex.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 10/31/2011

last visited: never

Image for Cut-mark, Fingringhoe Wildlife Trust Visitor Centre, Wick Farm, Fingringhoe, Essex.view gallery

EE17.1 km

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U.K. and Ireland TrigpointsCut-mark, Fingringhoe Wildlife Trust Visitor Centre, Wick Farm, Fingringhoe, Essex.

in U.K. and Ireland Trigpoints

A barely visible cut-mark on the old chimney stack of this converted barn.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 4/13/2012

last visited: never

Image for Trigpoint TP0398 - Maplestead, Essexview gallery

NN18 km

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U.K. and Ireland TrigpointsTrigpoint TP0398 - Maplestead, Essex

in U.K. and Ireland Trigpoints

A triangulation point on a pillar in the middle of a cultivated field.

posted by: Groundspeak Premium Member bluelamb03

location: Eastern England, United Kingdom

date approved: 6/8/2011

last visited: 11/6/2011

Image for Cut mark, All Saints' Church, Springfield, Essexview gallery

SWSW18.3 km

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U.K. and Ireland TrigpointsCut mark, All Saints' Church, Springfield, Essex

in U.K. and Ireland Trigpoints

On the north-west buttress of the church tower.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 3/19/2012

last visited: never

Image for Great Baddow's Parish Church Cut Mark, Church Street, Great Baddow, Essex.view gallery

SWSW19.3 km

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U.K. and Ireland TrigpointsGreat Baddow's Parish Church Cut Mark, Church Street, Great Baddow, Essex.

in U.K. and Ireland Trigpoints

A partially worn cut-mark on the south-west buttress of the tower of this impressive parish church.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 7/3/2012

last visited: never

Image for Chelmsford's Stonebridge Mark, Moulsham Street/High Street, Chelmsford, Essex.view gallery

SWSW19.8 km

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U.K. and Ireland TrigpointsChelmsford's Stonebridge Mark, Moulsham Street/High Street, Chelmsford, Essex.

in U.K. and Ireland Trigpoints

Nice cut mark and rivet on the eastern parapet of this old stone bridge.

posted by: Groundspeak Premium Member greysman

location: Eastern England, United Kingdom

date approved: 6/5/2013

last visited: never

Image for Flush Bracket - St John The Evangelist Church - Ford End, Essexview gallery

WW20.1 km

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U.K. and Ireland TrigpointsFlush Bracket - St John The Evangelist Church - Ford End, Essex

in U.K. and Ireland Trigpoints

A flush bracket on the Church of St John the Evangelist in Ford End, Essex just off the A130

posted by: Groundspeak Premium Member Norfolk12

location: Eastern England, United Kingdom

date approved: 10/15/2010

last visited: never

Total Records: 2089 Page: 1 of 84 prev<<<[12345678910]>>>next
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