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SANTONI SOLAR METHOD OF AERO-TRIANGULATION
ABRAMS AERIAL SURVEY CORP LANSING MICH
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The final phase in the evaluation of the Santoni Method of Aero-Triangulation is discussed. This method is based on the use of an aerial camera rigidly connected and aligned to a sun camera. These cameras take simultaneous photographs of the ground and sun respectively. Tip and tilt for each photograph can be determined from the resulting solar data. For this test two 100 model strips at 15,000 ft., and two 100 model strips at 25,000 ft., were flown. The triangulation differs from normal methods in that into each model was introduced the predetermined tip and tilt. Two adjustments of the triangulation were carried out 1, a bridge adjustment with ground control on each end and 2, a cantilever adjustment with only the initial ten models controlled. Final results show the bridge adjusted strips to be within very reasonable limits at both the high and low altitudes, and the cantilever adjusted strips to be somewhat less favorable. However, with certain modifications the cantilever result could be improved. It is concluded that the Santoni Method of Aero-Triangulation affords, within limits, a practical and accurate way of obtaining horizontal and vertical control for topographic mapping over large areas where ground control is sparse or non-existent. Author
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