Topography is the study of the forms and features of land surfaces. The topography of an area may refer to the landforms and features themselves, or a description or depiction in maps.
The Ordnance Survey National Grid reference system (OSGB), also known as British National Grid (BNG), is a system of geographic grid references, distinct from latitude and longitude, whereby any location in Great Britain can be described in terms of its distance from the origin, which lies to the west of the Isles of Scilly.
The Irish grid reference system is a system of geographic grid references used for paper mapping in Ireland. Any location in Ireland can be described in terms of its distance from the origin, which lies off the southwest coast. The Irish grid partially overlaps the British grid, and uses a similar co-ordinate system but with a meridian more suited to its westerly location.
The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface . The term elevation is mainly used when referring to points on the Earth's surface, while altitude or geopotential height is used for points above the surface, such as an aircraft in flight or a spacecraft in orbit, and depth is used for points below the surface.
Ordnance Survey Ireland was the national mapping agency of the Republic of Ireland. It was established on 4 March 2002 as a body corporate. It was the successor to the former Ordnance Survey of Ireland. It and the Ordnance Survey of Northern Ireland (OSNI) were themselves the successors to the Irish operations of the British Ordnance Survey. OSI was part of the Irish public service. OSI was headquartered at Mountjoy House in the Phoenix Park in Dublin, which had previously been the headquarters of the British Ordnance Survey in Ireland until 1922.
Ordnance Survey of Northern Ireland (OSNI) is the official mapping agency of Northern Ireland. The agency ceased to exist separately on 1 April 2008 when it became part of Land and Property Services, an executive agency of the Northern Ireland Department of Finance and Personnel, along with the Rate Collection Agency, the Valuation and Lands Agency, and the Land Registry.
The OS MasterMap is the premier digital product of the Ordnance Survey. It was launched in November 2001. It is a database that records every fixed feature of Great Britain larger than a few meters in one continuous digital map. Every feature is given a unique TOID, a simple identifier that includes no semantic information. Typically each TOID is associated with a polygon that represents the area on the ground that the feature covers, in National Grid coordinates. OS MasterMap is offered in themed "layers", for example a road layer and a building layer, each linked to a number of TOIDs. Pricing of licenses for OS MasterMap data depends on: the total area requested, the layers licensed, the number of TOIDs in the layers, the period in years of the data usage.
Abbots Deuglie is a hamlet in Perth and Kinross, Scotland. It is located in the Ochil Hills, in Arngask parish, about one mile (1.5 km) west of Glenfarg. Glenfarg Reservoir lies just to the west of the village, and was built in 1912.
The River Evenlode is a tributary of the Thames in Oxfordshire. It rises near Moreton-in-Marsh, Gloucestershire, in the Cotswold Hills and flows south-east to the Thames, its valley providing the route of the southern part of the Cotswold Line. The river flows for 45 miles (72 km) from source to the River Thames.
The River Cam is a small river in Gloucestershire, England. It flows for 12 miles (20 km) north-westwards from the Cotswold Edge, across the Vale of Berkeley, into the Gloucester and Sharpness Canal.
Address Point is a mapping/GIS data product supplied by Great Britain's national mapping agency, Ordnance Survey. It is based on the UK’s postal mail organisation, the Royal Mail, list of postal addresses, Postcode Address File (PAF). The most significant difference between Royal Mail list and Address Point is that Address Point includes the geographic coordinates of each postal address. This enables users to map the individual addresses.
Lunedale is the dale, or valley, of the River Lune, on the east side of the Pennines in England, west of Middleton-in-Teesdale. Its principal settlements are Grassholme, Thringarth and Bowbank.
The Great Britain Historical GIS is a spatially enabled database that documents and visualises the changing human geography of the British Isles, although is primarily focussed on the subdivisions of the United Kingdom mainly over the 200 years since the first census in 1801. The project is currently based at the University of Portsmouth, and is the provider of the website A Vision of Britain through Time.
The TN postcode area, also known as the Tunbridge Wells postcode area, is a group of 40 postcode districts in England, within 24 post towns. These cover south and west Kent and northern and eastern East Sussex, plus very small parts of Surrey and the London Borough of Bromley.
The Ordnance Survey (OS) is the national mapping agency for Great Britain. The agency's name indicates its original military purpose, which was to map Scotland in the wake of the Jacobite rising of 1745. There was also a more general and nationwide need in light of the potential threat of invasion during the Napoleonic Wars. Since 1 April 2015, the Ordnance Survey has operated as Ordnance Survey Ltd, a government-owned company, 100% in public ownership. The Ordnance Survey Board remains accountable to the Secretary of State for Science, Innovation and Technology. It was also a member of the Public Data Group.
The Ordnance Survey International or Ordnance Survey Overseas Directorate its predecessors built an archive of air photography, map and survey records for the United Kingdom from 1946 to 1999. The Ordnance Survey International Collection held mapping records that were acquired outside the UK.
Crown Copyright has been a long-standing copyright protection applied to official works, and at times artistic works, produced under royal or official supervision. In 2006, The Guardian newspaper's Technology section began a "Free Our Data" campaign, calling for data gathered by authorities at public expense to be made freely available for reuse by individuals. In 2010 with the creation of the Open Government Licence and the Data.gov.uk site it appeared that the campaign had been mostly successful, and since 2013 the UK has been consistently named one of the leaders in the open data space.
