Whilst the Ordinance Survey and the Hydrographic Department discharge their statutory responsibilities with regard to national mapping and hydrography, there exists a need for bespoke mapping and survey data to define and monitor physical forms and processes. The study sets the availability of many aerial photography sorties covering the coastal area of south-west England against the use to which these data are put by those with coastal interests and responsibilities. The problems of coastal site mapping and the derivation of quantitative data are related to factors which include costs, personnel, equipment and the adoption of alternative methods of collecting and portraying data.