Archive image from page 182 of Discovery Discovery discovery0304londuoft Year: DISCOVERY 173 carrying out survey work in countries where natural conditions make ground survey difficult, if not impossible. One of the most interesting cases in which aerial photography lias been used was in the dispute some little while ago between the municipal authorities of Edinburgh and Leith with regard to the boundary between these two places. When affairs had reached a high legal state, it was found necessary to obtain a map of the boundary as no up-to-date map was available. In order to secure the requ
Archive image from page 182 of Discovery Discovery discovery0304londuoft Year: DISCOVERY 173 carrying out survey work in countries where natural conditions make ground survey difficult, if not impossible. One of the most interesting cases in which aerial photography lias been used was in the dispute some little while ago between the municipal authorities of Edinburgh and Leith with regard to the boundary between these two places. When affairs had reached a high legal state, it was found necessary to obtain a map of the boundary as no up-to-date map was available. In order to secure the requisite information in the shortest time and with the least expense, an aeroplane was sent up and in the course of one flight secured a series of photographs which were enlarged and pieced together, showing clearly the whole of the disputed area. After the Armistice all the big towns in Egj-pt \\'ere accurately surveyed from aircraft. In India, Canada, and the United States aircraft have been used to photograph the timber areas, and from the shading, the type of timber which grows in these areas. For medical purposes aerial photography has been emploj'ed in order to locate mosquito-breeding swamps. One of the latest applications of aerial photography has been in \'enezuela, where aircraft have been i,mployed to take photographs in the Orinoco Delta in order that the grourid might be surveyed for oil- bearing districts. This country is practically im- possible to negotiate on foot, but it w*as found that aircraft could make use of the waterways and photo- graph the surrounding country, the oil-bearing areas showing up clearly as bare regions in the surrounding vegetation, for oil kills all trees and shrubs in its neighbourhood. At the present time one of the greatest needs for aerial navigators is the production of suitable and reliable air maps. Such maps must be accurate and should show the ground to be flown over in such a manner that it should be easily recognisable by the pil
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