ASPECTS OF COMPARATIVE AIR PHOTO-INTERPRETATION IN THE DYFI ESTUARY

In August 1966 aerial photography, using five film/filter combinations, was obtained of the Dyfi Estuary, on the coast of Cardigan Bay. The paper discusses some of the problems associated with a project involving several emulsions and in which photography of the inter tidal area must be achieved as near low water as possible. Preliminary results confirm that, in general, colour and false colour photographs improve both the speed and reliability of interpretation when compared to monochrome photographs.