Continuing our series to introduce you to the hard-working individuals within OS and showcase the wide variety of work we do, meet Dave Tucker. Dave has been with us for a long time but has always worked out in the field. Here, he gives us an insight on his role in mapping Great Britain…
How long have you worked for OS?
43 years – I started at OS in April 1975 at 19 years old! I started as a basic grade 4 surveyor after a gruelling survey course lasting 9 months. I’ve since been sponsored for qualifications including an MSc in Surveying. Currently, I am the South Region Manager in Field Operations and have been in this role for 15 years. I have also been an RICS Chartered Surveyor (MRICS) since 2006.
Can you describe your working day?
In three words, each day for me is busy, varied and rewarding. I have daily responsibilities such as liaising with my fellow field managers, regional management team and the team of 40 surveyors working remotely across London and the South East (using Skype as appropriate).
The Royal Institute of British Architects is gathering tonight to preview the RIBA Stirling Prize 2018 shortlist. The annual awards celebrate the best buildings in the UK, the vast majority of which OS surveys and adds to the master map of Great Britain. We’re wondering if our surveyor Tim Glasswell will complete a hat trick and find he has surveyed the winning building once more…
Tim works in our East of England team and has surveyed two buildings in Cambridge which have previously won the national RIBA Stirling Prize – the Sainsbury’s Laboratory (at the University Botanic Garden) in 2012 and the Accordia development in 2008. From this year’s shortlist, Tim and colleague Howard Boyer, surveyed the Storey’s Field Centre and Eddington Nursery, University of Cambridge.
You may know about our trig pillars, but did you know that there are more nostalgic reminders of how we used to map Great Britain?
Have you ever seen one of these while you’ve been out and about? If so, it is highly likely you have spotted one of our renowned benchmarks. 2018 marks 25 years since the last traditionally-cut arrow style benchmark was carved on a milestone located outside The Fountain pub in Loughton.
The Timepix historic photo site launches today and makes a unique set of photos from OS’ history available online for the first time. Over 21,000 photos catalogue the Manchester streets between the 1940s and 1960s, giving a unique insight into the city’s past captured by OS surveyors. From children and animals photobombing the surveyors, to a background of vintage adverts, Timepix showcases a fascinating collection of photos around Greater Manchester.
Why were OS surveyors photographing Manchester?
OS surveyors took revision point (RP) photos across Britain to provide a network of surveyed locations. These known spots could then be used to ‘control’ the position of detail on a large scale map. RPs were often on corners of buildings and other immovable features, and were fixed to centimetre accuracy. Finding the RPs for future map updates was an issue, and photography quickly became the best visual reference – leading to thousands of photos of men with white arrows…
We’ve had a few questions recently about benchmarks and trig pillars and what they are and how they differ, so we thought we’d clear it up.
Most weeks we’ll see a Twitter conversation where someone is asking what this mark is:
A #TBT to the OS benchmark, spotted here by @770.92. These survey marks can still be found on walls and buildings across Britain and were a way of recording height. Today, our surveyors use GNSS technology and it takes just seconds to do a task which could take days in our past. There are around 500,000 benchmarks in various formats – have you ever spotted one?
Many think it is War Office-related, but it is in fact an OS benchmark (BM) and a means of marking a height above sea level. Surveyors in our history made these marks to record height above Ordnance Datum Newlyn (ODN – mean sea level determined at Newlyn in Cornwall). If the exact height of one BM was known, the exact height of the next could be found by measuring the difference in heights, through a process of spirit levelling. They can be found cut into houses, churches, bridges and many other structures. There are hundreds of thousands of them dotted across Great Britain, although we no longer use them today.
We usually share stories about our teams adding new features to the map, such as the Queensferry Crossing or even a whale, but we also have to remove features from our database. London-based surveyor Tony Killilea was recently tasked with removing a football stadium from the map…
With over 500 million geospatial features across Great Britain and some 10,000 changes taking place in the database each day, it’s not difficult to understand how our surveying teams are kept busy. From new roads to new shopping centres, it’s easy to forget about the existing features that have to be removed for new developments to be built.
The Queensferry Crossing opens to traffic today and joins the Forth Road Bridge and Forth Bridge in spanning the Firth of Forth. Our surveyors Derek Smith and Guy Rodger visited the site last week to add some final details, along with Alastair Dalton from The Scotsman newspaper.
OS MasterMap showing the three bridges
Opening tomorrow, during National Parks Week 2017, is The Sill National Landscape Discovery Centre in Northumberland National Park. Our surveyor Richard Bennett was on site recently to ensure the building was added to the map.
The Sill is the result of a partnership between the National Park and YHA England and Wales, including space for exhibitions, a café, a Youth Hostel, a rural business hub, and a shop specialising in local crafts and produce.
Richard was on hand to measure every aspect of the site and add the featured to 550 million in our geospatial database. His GNSS receiver locks on to several satellites and a series of ground stations (that’s right, no trig pillars required!) and the calculations are accurate to within a few centimetres.
A stunning development of new beach huts on the south coast has been added to our geospatial database ahead of the summer season.
The development, in Milford on Sea, replaces the old beach huts which were damaged and destroyed during a fierce storm on 14 February 2014. With building work on 119 beach huts and the surrounding area reaching a conclusion, it provided the ideal opportunity for our surveyor Joanne Lanham to officially capture and map the changes on the site.