PHOTOGRAMMETRY - THE IRISH EXPERIENCE

The history of survey and map production methods used by the Ordnance Survey of the Republic of Ireland is outlined and the significance of the decision, taken in the 1960s, to maximize the use of computer tech nology is emphasized The four objectives of the Ordnance Survey's curr ent programme of work (urban mapping, small scale database, large scal e database and private sector support) require effort to be concentrat ed on resurvey procedures and no revision of old mapping is carried ou t. Details are given of equipment possessed by the Ordnance Survey and of staff distribution, followed by descriptions of procedures adopted for achieving both the small scale and large scale databases. Justifi cation is presented for the decision to commit major financial investm ent to digital photogrammetry.