Abstract
During the early part of the War a need arose for showing how a map can be constructed from aerial photographs. Since no suitable strips of aerial photographs were readily obtainable, strips of imitation aerial photographs were prepared by traversing a fairly large plaster relief model of part of a well-known part of the Western Highlands of Scotland with an ordinary camera kept at a small fixed distance from the base of the model, and maintained with its optical axis normal to the base of the model. The successive positions of the camera relative to the model were arranged so as to give adequate overlap of adjacent photographs and strips. Enlarged prints of a convenient size were made and successfully used for demonstrating the construction of a map from a series of strips of aerial photographs. (It should be noted that the camera had no collimating marks, and therefore the principal point of the photographs was assumed to be at the intersection of the diagonals. No special photographic materials were employed.)
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References
"Aerial Photographs: their Use and Interpretation", by A. J. Eardley (see NATURE, April 24, p. 459).
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HOBSON, G. Map Construction from Aerial Photographs. Nature 151, 588 (1943). https://doi.org/10.1038/151588a0
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DOI: https://doi.org/10.1038/151588a0
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