Main Entry: pho·to·gram·me·try

Pronunciation: \ˌfō-tə-ˈgra-mə-trē\

Function: noun

Etymology: International Scientific Vocabulary photogram photograph (from phot- + -gram) + -metry

Date: 1875

: the science of making reliable measurements by the use of photographs and especially aerial photographs (as in surveying)

— pho·to·gram·met·ric \-grə-ˈme-trik\ adjective

— pho·to·gram·me·trist \-ˈgra-mə-trist\ noun