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Thomas Colby, the long-serving Director-General of the Ordnance Survey in Great Britain, was the first to suggest that the Ordnance Survey be used to map Ireland. A highly detailed survey of the whole of Ireland would be extremely useful for the British government, both as a key element in the process of levying local taxes based on land ...
In 1777, maintenance contracts, allowing for regular maintenance, were established. Taylor and Skinner's Maps of the Roads of Ireland was first published in 1778, with a second, revised edition in 1783. It provided detailed strip maps of the principal roads along with other topographical details. [28] Herman Moll 1732 map showing the principal ...
Road signs in Northern Ireland follow the same design rules as the rest of the United Kingdom. Distance signposts in Northern Ireland show distances in miles, while all signposts placed in the Republic since the 1990s use kilometres. The Republic's road signs are generally bilingual, using both official languages, Irish and English.
Map of Ireland, 1695; based on Petty's Down Survey maps. The Down Survey was a cadastral survey of Ireland, carried out by English scientist, William Petty, in 1655 and 1656. It was created to provide for precise re-allocation of land confiscated from the Irish.
A national primary road (Irish: príomhbhóthar náisiúnta) is a road classification in Ireland. National primary roads form the major routes between the major urban centres. There are 2649 km of national primary roads. This category of road has the prefix "N" followed by one or two digits. Motorways are prefixed "M" followed by one or two digits.
In general, neither Ireland nor Great Britain uses latitude or longitude in describing internal geographic locations. Instead grid reference systems are used for mapping.. The national grid referencing system was devised by the Ordnance Survey, and is heavily used in their survey data, and in maps (whether published by the Ordnance Survey of Ireland, the Ordnance Survey of Northern Ireland or ...