Ordnance Survey's Levelling of Great Britain

[2GL Abstract] [2GL Transcription]

What's New

After the furrey of activity on Nov '04 and Dec '04 development has slowed down a bit, so I am moving back to a single page. (see also page for 2004)

What's new for March 2005

Levelling

• Starting to look again at the levelling transcriptions
• Added link to gpsvisualizer.com, for plotting 2GL data, look for the new link on the Line Details page. (Sorry this service is Only available for 2GL at the moment)

www.nearby.org.uk

• www.nearby.org.uk is a rebranding of the Location based searches, which really have diversived from the core of trigtools rather a lot! Hopefully nothing should be lost, please have a play and let me know of any problems.
  • with the problems with the server just after launching mapping.org.uk, i'm keeping this launch fairly quiet for now!

www.mapping.org.uk

• Re-Launch of Mapping and Cartography Information website: www.mapping.org.uk
  • After the failed launch of the site, due to the ISP being brought out, I hope this can restart again. I lost enthusiam for the project after all the hassles, but I hope to start updating it with (much new and unrelased) meterial I have found/learned.

Coordinate Converter

• Every wondered how accurate a Latitude/Longitude coordinate actully is? Well now the coordinate converter will tell you! See also the percision and uncertainly for decimal degree coordinates in m/km and miles page.
• Added a few new formats to the Coordinate convertor:
  • NAC - Natural Area Coding™ System, also known as Universal Map Grid™ or Universal Address™ - a short alpha-numberic representation for anywhere in the world. More on NAC
  • UTM - Universal Transverse Mercator - A rectangular metric mapping coordinate system used instead of latitude and longitude. Similar to UK National Grid - as rectangular its easy to calculate distances between positions. More on UTM
  • Approx Position - Obscure but potentially useful way of representing a Lat/Long as a single Integer, ideal for databases. The percision (number of bits in the Integer) can be variared depending on the amount of accuracy required. More on Approx
• Added a number of new links (mainly to the Lat/Long section) to maps and location searches around the world.

TrigpointingUK

• Added a New Ident-i-Trig Quiz - Game where you try to identify trigpoints you been to from others photographs
• A number of small new scripts and improvements, eg Cumulative Graph of Trigs Logged

Geocaching

• Much of the code from TrigTools T:UK has been adopted for use on Geocaches within Geocachinguk.com

NAC, Natural Area Coding, Universal Map Grid and Universal Address are trade marks of NAC Geographic Products Inc (Used under Licence)

What's new for Feburary 2005

Geocaching

• CacheTools Section on G:UK
  • I was hit by the realisation that the TrigpointingUK section of TrigTools, could (in large part) be applied to Geocaches by virtu of Teasels close association between Caches and Trigpoints.

Levelling

• Added Links to Ians Hard work on transcribing the London Abstract.

Postcodes

• Added a new Postcode Statistics page, for some interesting figures extracted from the Postcode database

Location Search

• (3rd) - New Gateway page for the Location Search that links to the correct search for the type of information you looking for!

What's new for January 2005

Location Search

• (19th) New Looking for Something? Directory of Geographical Search Engines
• (3rd) Few More datasets are slowlly being added
• I am also (slowly) starting to improve the maps

• Mapping Flavoured Web Search: (by Gigablast.com)

Levelling

• The 1GL Transcription Project it Starting to Gain Momentum!
  
  
  • 1GL Transcription Guide, 1GL Abstract and Index
    
    
• (8th) The principal lines of spirit levelling in England and Wales abstract has been totally scanned and uploaded.

Triangulation

• (10th) Added details of 'Readjustment of the Triangulation' toPrimary Triangluation of Great Britain

• (2nd)can actully convert OSGB Grid Ref <-> WGS84 coordinates now
• (5th & 11th) More links added, espically in the Lat/Long Section
• (20th) Added information on the Differnt Coordinates used though-out TrigTools

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