photoclinometry
/ˌfəʊtəʊklɪˈnɒmɪtri/ /ˌfəʊtə(ʊ)klʌɪˈnɒmɪtri/noun
The process of deriving topographical information about a region from measurements of the brightness distribution in aerial photographs of it.
Origin
1960s; earliest use found in Surveyor III. From photo- + clinometry. Attributed in quot. 1974 at main sense and elsewhere to J. F. McCauley, but this has not been traced.
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