Ethnography

"production of descriptive studies of customs of particular tribes or people (i.e. office workers). It is a fundamentally important branch of cultural and social anthropology, since the theoretical propositions of the anthropologist depend ultimately on the completeness, sensitivity, and accuracy of ethnographic accounts. Ethnographers are without exception anthropologists well-trained in the use of photogrammetry, tape recording, videography, elementary mapping, and linguistic principles."

Encyclopedia Britannica