62.
The relation between the air base (B), photographic base (b), flying height (H) and the focal length (f) of a vertical photograph, is

65.
The parallax equation $$\Delta {\text{p}} = \frac{{{\text{Bm}}\Delta {\text{h}}}}{{{\text{H}} - {\text{h}}}}$$   is applicable to entire overlap of the photographs only if parallax is measured

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