Earle, Land Charters (Oxford, 1888); Thorpe, Diplomatarium Anglicanum; Facsimiles of Ancient Charters, edited by the Ordnance Survey and by the British Museum; Haddan and Stubbs, Councils of Great Britain, i.-iii.
During the 19th century the measurements of the various parts of the Carpathians was undertaken by the ordnance survey of the Austrian army, which published their first map of the central Carpathians in 1870.
The ordnance survey office is the headquarters of the ordnance survey department of Great Britain and Ireland.
The completion of the ordnance survey and the establishment of an educated constabulary force brought the operations of 1841 up to the level of those of the sister kingdom.
In 1864 was founded the Palestine Exploration Fund, under the auspices of which an ordnance survey map of the country was completed (published 1881), and accompanied by volumes containing memoirs on the topography, orography, hydrography, archaeology, fauna and flora, and other details.
