This is the 9985th most frequent Japanese word.
踏査
"踏査" (とうさ) means "field investigation" or "survey conducted by walking."
Here, 踏査 (survey) pertains to the findings from the conducted investigation or analysis of the area.
この踏査の結果、貴重な鉱物が発見されました。
As a result of this survey, valuable minerals were discovered.
In this sentence, 踏査 (survey/exploration) refers to the comprehensive appraisal of a remote location by the expedition team.
探検隊は僻地の踏査を終了し、拠点に戻りました。
The expedition team completed the survey of the remote area and returned to the base.
In this sentence, 踏査 (survey/investigation) is used to describe an action being carried out by geologists as part of their field research.