This led to many townlands being recorded as having two names during the 1824 Ordnance Survey, and some maps today give different names for the same place.

The name ' Bodmin Moor ' is relatively recent, being an Ordnance Survey invention of 1813.

The latest Ordnance Survey Ireland " Discovery Series " ( Third Edition 2005 ) 1: 50, 000 map of the Dublin Region, Sheet 50, shows the boundaries of the city and three surrounding counties of the region.

The government of the UK produces the classic 1: 50, 000 ( replacing the older 1 inch to 1 mile ) " Ordnance Survey " maps of the entire UK and with a range of correlated larger-and smaller-scale maps of great detail.

* Ordnance Survey showing reference to Smallpox Hil: http :// explore. ordnancesurvey. co. uk / os_routes / show / 1539

The Ordnance Survey Explorer 120 map covers the area and the local tourist information office supplies leaflets of local interest walks.

St Albans on the 1 inch to the mile map Ordnance Survey map of 1944

Many national surveying projects have been carried out by the military, such as the British Ordnance Survey ( now a civilian government agency internationally renowned for its comprehensively detailed work ).

* Ordnance Survey Maps

* Ordnance Survey UK map agency

In Great Britain, the Ordnance Survey use the term myriad to refer to a 100 km × 100 km area in the National Grid.

* Ordnance Survey, Government of the United Kingdom, 1984.

Reprinted in 1995, published by the Government of the United Kingdom ( Ordnance Survey ) for the Government of Saint Christopher ( St. Kitts ) and Nevis.

* Ordnance Survey Ireland ( Suirbhéireacht Ordanáis Éireann )

* Ordnance Survey, the national mapping agency for Great Britain

Sir Hugh Munro, a founding member of the Club, took on the task using his own experience as a mountaineer, as well as detailed study of the Ordnance Survey Six-inch to the mile and One-inch to the mile map series.

The Scottish Mountaineering Club have carried out a number of revisions of the tables, both in response to new height data on Ordnance Survey maps and to address the perceived inconsistency as to which peaks qualify for Munro status.

1945 Ordnance Survey map of Dover, showing the harbour

Strangely, there seems to be some confusion between the Gwynfi and the Afan itself ; one of the two streams that form the river is named the Nant Gwynfi, while the other appears not to have a name, but is labelled on the Ordnance Survey map of the area as " River Afan " ( as is the entire length of the Gwynfi ).

This grid is usually tied into a national geomatic database such as the Ordnance Survey in the UK.

For example, in the late 1780s, a team from the Ordnance Survey of Great Britain, originally under General William Roy began the Principal Triangulation of Britain using the specially built Ramsden theodolite.

* Many leats used for tin mining are marked on the 1 / 50000 and 1 / 25000 Ordnance Survey maps, such as that serving the now-defunct Vitifer mine near the Warren House Inn.

* UK Ordnance Survey

* Modern mapping of the area Ordnance Survey Ireland Select " Historic mapping " to see site of the " Boyne Obelisk " ( destroyed, 1923 ) on the northern side of the bridge.

War Department ( UK ) | War Department Ordnance Survey Marker, Bermuda.

As late as 1947 an Ordnance Survey map refers to the island as Borough Island.

The Ordnance Survey ( OS ) produces topographic map series covering the United Kingdom at 1: 25, 000 and 1: 50, 000 scales.

Part of an Ordnance Survey map, published 1952.

The cave is marked on the Ordnance Survey Explorer map 187 ( Llandovery ).

* Ordnance survey map of Lancaster circa 1890

The 1874 Ordnance Survey map of the area shows the following factories, in order, from the site of the as yet unbuilt Wandsworth Bridge to Battersea Park: Starch manufacturer ; Silk manufacturer ; ( St. John's College ); ( St. Mary's Church ); Malt house ; Corn mill ; Oil and grease works ( Prices Candles ); Chemical works ; Plumbago Crucible works ( later the Morgan Crucible Company ); Chemical works ; Saltpetre works ; Foundry.

The 1868 Ordnance Survey map shows the Old Crooked Billet located to the southeast of the current location.

The name, which appears on the Ordnance Survey map of 1822, was later applied to the early 20th century Camden Town Group of artists and the London borough of Camden, created in 1965.

* Historic Maps Maps of Horning: Aerial photos from 1945 & 1988 ; Enclosure plan from 1800 ; Tithe map from 1840 ; and Ordnance Survey 1st edition

* Old Ordnance Survey map of the area as in the 1920s: see the word " Aerodrome " between the two roads going north-northwest from Purley ; the westerly of those two roads is Plough Lane.

The Firth of Clyde is sometimes thought to include the estuary as far upriver as Dumbarton, but the Ordnance Survey map shows the change from river to firth occurring off Port Glasgow, while locally the change is held to be at the Tail of the Bank where the river crosses a sandbar off Greenock at the junction to the Gare Loch, or even further west at Gourock point.

* Norfolk County Council E-Map Explorer | Briggate ( part of tithe map, c. 1840 ) | Briggate ( part of Ordnance Survey map, 1st Edition )

The Old Saw itself used to be on further down Spen Lane ( labelled on an Ordnance Survey map as ' Heygate '), which was renovated by its current owner due to instability of the property.

File: Sutton Washway. jpg | Ordnance Survey map of 1810: Cross Keys Inn is now within Sutton Bridge.

The Ordnance Survey map of 1849, shows that Heworth was effectively a square of three parallel streets sandwiched between the then Scarborough Road and East Parade.

Ordnance Survey map of Corfe Castle in 1856, showing the castle and village in the gap of the Purbeck Hills