The phrase "based on fieldwork" is correct and usable in written English.
You can use this phrase when discussing research that has been conducted through firsthand observation in the field, such as interviews, surveys, or experiments. For example: "This study's conclusions are based on fieldwork conducted in several rural villages."
The agency's analysis was based on fieldwork, using information about the locations that was provided by the Israelis.
Currently he is completing a project on Qur'anic exorcism based on fieldwork conducted in Fes, Morocco.
The geomorphological maps are based on fieldwork supported by aerial photographs.
It then studies the effects of these changes based on fieldwork in three Southern African countries - Zimbabwe, Namibia and Botswana.
Her doctoral thesis was a description of the Shasta language based on fieldwork condicuted in 1957-1961.
A desertification classification and grading system for Ningxia's grassland was then designed based on fieldwork and expert review.
He is completing his dissertation, which is based on fieldwork he conducted in Uganda to increase health care access in rural communities.
After graduating, in 1947 he joined the Institute of Social Anthropology in Oxford to do a DPhil based on fieldwork in the Luapula Valley in Northern Rhodesia (now Zambia), with support from the Rhodes-Livingstone Institute (1948-51).
The novel was based on fieldwork that Lins, who moved into the area as a seven-year-old boy, had begun for a project on the criminal underclass conducted by a prominent anthropologist, Alba Zaluar.
Cross-sections revealing the 3D complexity of saprolith development are mainly based on fieldwork, boreholes, laboratory tests, and the excavation works.
It is based on fieldwork with Tanesco Disconnection Teams and Revenue Protection Units that circulate through various neighborhoods to monitor, inspect, and occasionally disconnect household and commercial meters.
