Surveying Glossary — Letter O

Βασικοί όροι στη δημοσιογραφική τοπογραφία και τη γεωχωρική τεχνολογία.

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Oblique Imagery

Aerial or satellite images captured at an angle rather than directly vertical, providing three-dimensional perspective views of terrain and structures.

Offshore Survey

The process of measuring and mapping underwater and coastal areas using specialized equipment and techniques to support marine engineering and resource development projects.

optical plummet

An optical instrument used in surveying to precisely align a theodolite or transit vertically over a point on the ground.

Orthometric Height

The vertical distance from a point on the Earth's surface to the geoid, measured along the direction of gravity.

orthophoto

A photograph of the Earth's surface that has been geometrically corrected to remove distortions caused by camera tilt and terrain relief.

Overlap

The area where two adjacent survey photographs, maps, or survey strips share common ground coverage.