Sentences with phrase «compared aerial photos»
They compared aerial photos of the glaciers taken in 1936 and maps drawn in 1962 with their own surveys conducted in 1971, 1993 and 1994.
https://www.newscientist.com/
Lesson 9) Comparing aerial photos.
Not exact matches
Using aerial photos and comparing the patterns of its leaves and bark, Barnes drew a 107 - acre perimeter around the colony on a map and published his report in a Canadian scientific journal in 1976.