바다, 강, 호수 등의 물의 상태를 조사하고 지도로 만드는 수로학 또는 수로 측량에 관한.
Relating to the science of surveying and charting bodies of water, such as oceans, seas, lakes, and rivers.
예문:
"The team conducted a hydrographic survey to map the depth of the harbor."
"Hydrographic charts are essential for the safe navigation of large vessels."
"New hydrographic data revealed underwater mountain ranges previously unknown."