noun
site survey; field study
Refers to on-site investigation or research conducted in the actual location, as opposed to desk research.
来週、建設予定地の実地調査を行います。
Next week, we will conduct a site survey of the planned construction site.
現地調査 is a near-synonym also meaning on-site investigation, but 実地調査 emphasizes practical, hands-on examination, while 現地調査 simply means going to the actual location.
Compound of 実地 (じっち, 'actual place, practice') and 調査 (ちょうさ, 'investigation, survey').