Abstract
AbstractMethods of testing and adjusting photogrammetric plotting instruments are reviewed and the precision of traditional simple methods is investigated. Practical tests confirm the theoretical results and suggest the most efficient methods for determining the co‐ordinates of the perspective centre, the principal distance and the adjustments necessary to the interior orientation. These methods are incorporated in a procedure for testing instruments using either a large computer or a desk top computer. It is concluded that an improvement in accuracy and efficiency can be obtained by using redundant observations and a computer to handle the mathematical adjustment.
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