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Irish grid reference system
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==2001 recasting: the ITM grid== {{main|Irish Transverse Mercator}} In 2001, the Ordnance Survey of Ireland and the Ordnance Survey of Northern Ireland jointly implemented a new coordinate system for Ireland called Irish Transverse Mercator, or ITM, a location-specific optimisation of [[Universal Transverse Mercator coordinate system|UTM]], which runs in parallel with the existing Irish grid system. In both systems, the true origin is at 53Β° 30' N, [[8th meridian west|8Β° W]]<ref>{{Cite web|url=https://osi.ie/resources/reference-information-2/irish-grid-reference-system/|title = Irish Grid Reference System}}</ref> β a point in [[Lough Ree]], close to the western ([[County Roscommon|Co. Roscommon]]) shore, whose grid reference is {{Oscoor|N000500}}. The ITM system was specified so as to provide precise alignment with modern high-precision [[Satellite navigation|global positioning receivers]].
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