Surveying Glossary — Letter O

Nyckelbegrepp inom professionell mätning och geospatial teknik.

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Oblique Imagery

Aerial photography captured at an angle other than vertical, providing perspective views of terrain and structures.

offshore survey

Surveying activities conducted in maritime environments beyond coastal areas to map seabed features, underwater structures, and bathymetry.

Optical Plummet

An optical instrument mounted on surveying equipment that uses a telescope and prism system to project a vertical line of sight for precise centering over a survey point.

orthometric height

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

orthophoto

Orthophoto je digitalna slika terena korigovana za distorzije uzrokovane nagibom kamere i topografijom.

otal Station

An electronic surveying instrument that measures distances and angles to determine positions of points on the earth's surface.

Overlap

The area where two or more survey photographs, map sheets, or survey lines cover the same ground.