AIR PHOTOGRAPHY
EXTENSIVE SURVEYS IN CANADA. TORONTO. Canada leads the world in the use of air photography for survey put poses having mapped some 777.500 square miles by this new technique. Of this total more than 550,000 square miles can be classed as strictly exploratory mapping. Aside from speeding up the field work of the map makers and increasing the geographical knowledge of the Dominion, the contribution of air surveys in the mining field has been even more noteworthy. In addition to opening up new areas to prospecting and development, they pro-’ vide the base maps for geological surveys and a rapid means of evaluating the possibilities of water-power developments upon which the mining industry in remote districts is largely dependent for power.
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Wairarapa Times-Age, 1 May 1939, Page 5
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123AIR PHOTOGRAPHY Wairarapa Times-Age, 1 May 1939, Page 5
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