Today’s guest blog is from Cristina Savian at Autodesk. If you were at last week’s GEO Business 2014 event, you may have seen our Acting Director General, Neil Ackroyd give his keynote and feature the image below, an infraworks model of Shrewsbury which was created using our new building height dataset. Cristina created the model and tells us how.
Customers using Ordnance Survey’s OS MasterMap Topography Layer can now access information on the heights of almost 20 million buildings across Great Britain with the alpha release of building height attributes. Released on 17 March, OS MasterMap Topography Layer – Building Height Attribute is a product enhancement to OS MasterMap Topography Layer, and available to licence holders at no additional cost.
Ordnance Survey make 10,000 changes a day to the master map of Great Britain. This fact often astounds people and this behind the scenes story from one of our surveyors, Dom Turnor, helps explain just how many changes occur to our landscape every day.
I’m a forty-something field surveyor living and working in the rolling hills and hidden valleys of Worcestershire, where my primary job and purpose is to keep the large scale mapping up-to-date. I have been working as a field surveyor for nearly 13 years and have concentrated my efforts mainly around the golden villages of the Cotswolds, the post-industrial towns of the Forest of Dean and the wooded valleys of Stroud. It has only been in the last year that I have been transferred a little to the north; where I now find my area of responsibility to be the Malvern Hills.
If you’re a user of our maps, then you’ll be familiar with the small blue map symbols that give helpful tourist information when you’re out and about. If you’ve ever wondered how those symbols are checked and placed on our maps, today’s blog from Kim Hall, one of our team based in the East of England, will answer your questions.
I spend my working week interacting with Ordnance Survey mapping data, but it’s rare that I unfold a paper map and delve into the dark arts of map reading and navigation. I was offered the opportunity to reconnect with that part of our operations and to get in the mindset of paper-map user for the day…
We have an excellent help and support section on our website to advise you on Ordnance Survey map products, map facts, maps and symbols for emergencies and getting the most from our online mapshop. A question we’re often asked is ‘what is GIS?’ and there’s a whole section dedicated to that too. Find out the basics here and visit the website to dig deeper into the subject.
Put simply, a GIS is a geographical information system, and to make that system work, you need maps and some software. We are one of many organisations producing map data for use in GIS. There are many more companies who then produce GIS software.
We were delighted to have been invited along to participate in BBC Radio 3’s Free Thinking Festival last weekend at Sage Gateshead.
Sage Gateshead is an iconic building, which opened in 2004, on the south bank of the River Tyne and hosts a range of musical education workshops, performances and conferences. It was a fitting venue to some of the country’s leading thinkers over a weekend which promised provocative debate, new ideas, music and performance.
Our Director General Vanessa Lawrence was invited to be on the panel for a session entitled ‘Why are maps still so powerful?’ along with author and academic Jerry Brotton – author of ‘A History of the World in 12 Maps’. Presented by BBC’s Rana Mitter, the radio interview was recorded in front of a live audience of around 200 map users.
Discussions are recorded for BBC Radio 3 and broadcast over the next three weeks or available to download.
Yorkshire Wildlife Trust
Yorkshire Wildlife Trust (YWT) is part of the influential UK-wide partnership of 47 Wildlife Trusts and has worked for more than 65 years to protect wildlife and wild places and educate, influence and empower people to conserve wildlife.
Responsible for 95 sites covering in excess of 6300 acres, YWT manages assets within different territories as well as mapping and tracking the ownership of site boundaries and collecting and storing extensive conservation data from surveys. They work with landowners on many conservation projects and mapping plays a key role in the large portion of their activity.
The Trust needed to be able to view and analyse the information they were gathering on a digital map – the data needed to be presented in a comprehensive, visual and geographic nature to fully understand the relationship between the data and the geography.This in turn would help with funding bids, as well as managing projects and memberships.
Guest post by Gayle Gander of GeoPlace (@GayleGander)
Case studies from the 2012 GeoPlace Exemplar Awards have now been published in book form.
The case studies celebrates the work of Award winning Custodians across the country and demonstrate how Authority Address Custodians and Authority Street Custodians are enabling local authorities to create efficiency savings and support service delivery.
The Custodians are the people responsible for creating and maintaining essential national resources in the form of the National Street Gazetteer and the National Address Gazetteer. The National Address Gazetteer is a critical part of the AddressBase® range of products which are now widely available, and being used by the public sector through the Public Sector Mapping Agreement (PSMA) as well as by the private sector.
The case studies featured in this book demonstrate the importance of address and street information to local government – with much of the best practice transferable to other organisations across the public sector.
It’s getting to the time of year where the school holidays are approaching and you might be thinking of something to keep the children entertained, especially after the excitement of Christmas Day. One idea to get outdoors that can appeal no matter the time of year is the zoo. Most are open all year around, closing only on Christmas Day itself.
Did you know that London Zoo was founded in 1828, making it the world’s oldest scientific zoo. Located on the edge of Regent’s Park, it’s home to 755 different species of animals and more than 16,000 animals.
Today’s zoos are a far cry from the tiny enclosures of days gone by and capturing zoos on a map, makes you realise just how large an area they cover. Of course, our intrepid team of surveyors don’t have to map the animals themselves, no matter how large they may be.
Would you recognise zoos from across the country on a map? That’s the theme for our mapping extract quiz this week. Let us know the names of the zoos on our eight OS MasterMap Topography Layer extracts and post your answers on the blog.
Guest blog by Graham Pennington, Geodesy & Positioning team
Today (Friday 7 December) is the 75th anniversary of the completion of measurements on the Ridgeway Base. The Ridgeway Base runs from White Horse Hill (grid ref. SU3008386375) to Liddington Castle (grid ref SU2098279752) with trig points marking each end. The baseline was one of several measured sides in the network of observed triangles that made up the triangulation network for the re-triangulation of Great Britain. A triangulation network requires at least one measured side in order to control scale and to fix the size of the network to “the real world”.
At its simplest, the baseline was a straight line measured between two fixed points, measuring just over 11 km in length and divided into 18 bays approx. 3/4 km in length. However, in these days of satellite surveying at cm accuracy and laser distance measurement at mm accuracy, it is easy to take for granted the accuracy of the results achieved 75 years ago and the effort involved in measuring the baselines. The measurements were taken using little more than tapes measuring 24 m in length and just 3 mm wide. Each bay was measured 3 times and the measurements only accepted when they agreed to within 0.2 mm. This is an incredible tolerance even today and the overall accuracy of the whole length was estimated to be just 1 cm. When the length was checked in 1951, with superior equipment, it only differed from the original measurement by just over 6 mm!