TrigTools

Location Searches
- GB Location Search - Location based Search Sngine - Find Megaliths, Walks, Mountains, Fords, Geocaches, Triangulation Pillars, OS Benchmarks, Radio Transmitters and More!
- New Looking for Something? Directory of Geographical Search Engines
- Co-ordinate Converter - includes links to most of the below!
- UK and Ireland Feature Finder - Find webpages for any UK or Ireland Grid Feference.
- Gazetter of UK Places and Features - works with Grid References
  UK Placename Gazetteer - works with Lat/Long co-ords
- Also: GB Trigs also Irish Trigs
UK Trigpoints (data from Trigonomy)
- UK TrigPoints Text/Flush Bracket Search - includes Height based search and fuzzy name search, for when unsure of spelling!
- UK TrigPoints Location Search similar to trigpointinguk.com and jeremyp.net
- Sort the list of trigs by their proximity to other trigs
- Map of Primary Stations and Secondry Blocks, from the Retriangulation of Great Britain.
- A map of the Primary Rays observed during Re-Triangluation of Great Britain
- TrigPoints in Ireland Search - search for Trigs in Ireland
Analysis of TrigPoint data at trigpointinguk.com
- My T:UK TrigTools page
- The old scripts hosted here are still available (using old data).
Geodetic Levelling of Great Britain (more)
- A report of the Primary Lines of Second Geodetic Levelling in England and Wales by Colonel Sir Charles Close is currently being transcribed to digital format, follow the progress here.
- Abstract of the First Geodetic Leveling: Abstracts of the principal lines of spirit levelling in England and Wales / by Henry James. (1861), is also being transcibed here
- Abstract of Secondary Re-Levelling of London: includes details of each FB used during that period
- Lists of Fundamental Benchmarks, Auxiliary Stations and Tide Guages
- Index of Pictures on OSBM msn group
- Timeline of signifcent events in OS history
- Maps of Triangulation and Levelling, from the National Archives
- Plates from OS Annual Reports 1954-67 showing Levelling Progress (soon to include some plates from triangulation)
- Interactive digital Maps of this levelling data
- Map of Primary Lines from the Third Geodetic Levelling
Flush Bracket Numbers

See New Version based on Location Search Data Sources

Takes the trigpoint data from Trigonomy and wall flush brackets from OSBM (marked with OSBM in the height column).
- View all list (WARNING ABOUT 1.8MB IN SIZE, might take a while to download...)
  - Narrow by Grid Letters: (e.g. SH) (approx 70k page)
Datebases
- World Datums - With Filter to show just ones by the OS (data of unknown origin)
- Lists of Fundamental Benchmarks, PassiveAuxiliary Stations and Tide Guages - As far as aware these are complete and authoritive (as at Sept 04)
- London FB's - partical listing from abstract of london levelling
- 2GL Transcription Project - complete list of NPFB's from Second Geodetic Levelling
- Abstract of RE-LEVELLING OF LONDON - complete list of NPFB's from Secondary Levelling in Greater London
General
- Co-ordinate Converter - accepts OSGB, OSI/OSNI, WGS84, NAC, postcodes and telephone numbers
  - Also Longitude and Latitude Entry Form, WGS84 Lat/Long Percision and
- Flash Bracket Numbers, see new version based on Location Search Data Sources
- UK Placename Gazetteer
See Also:
- Links to Other Websites I find useful
- Sources of data used in compiling this website
- Links to Map Websites that I like
Web Search
- Search the Web - powered by gigablast.com
- Google.co.uk

DISCLAIMER: I developed this tools for my own use, so they don't look that pretty. I hope they work fine, but there may well be bugs. Please email me if you find any... All the programs are hand developed, but the data used is borrowed from other locations, namely the Trigonomy Yahoo Group and trigpointinguk.com, thanks to them for making the data available.

This page created by Barry Hunter (c)2004 part of Trig Tools
If interested the background is Moel Oernant
Uses many Sources of Data, how do you data-mine without data?