A major review of the Ordnance Survey mapping programme was undertaken in 1989 as a result of which the then Minister for Finance instructed that the following programme be undertaken:
an urban mapping programme (1:1000) which covers towns with a population of 1,000 and over. These maps are now for the most part up-to-date and available in printed and digital form;
a rural mapping programme (1:2500) involving a full resurvey of rural Ireland. Under this programme, the country is being systematically resurveyed using aerial photography and new technology.
a small scale mapping programme (1:5000) aimed at the tourism industry and comprising seventy-nine sheets. To date, nineteen sheets have been published with a further eight due to be published by the end of this year.