Surveying Glossary — Letter M

Nyckelbegrepp inom professionell mätning och geospatial teknik.

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Machine Control

Automated systems that guide heavy equipment to precise grades and slopes using real-time positioning data and design specifications.

map scale

The ratio between distances on a map and corresponding distances on Earth's surface.

marine survey

A comprehensive measurement and assessment of coastal and ocean environments to map underwater topography, identify hazards, and support navigation.

mean sea level

The average height of the ocean surface calculated over a specific time period, used as the reference datum for measuring elevations.

MEP Survey for BIM

A specialized surveying methodology that captures precise spatial data of Mechanical, Electrical, and Plumbing systems for integration into Building Information Modeling platforms.

Mercator Projection

A cylindrical map projection that preserves angles and compass directions, making it useful for navigation but distorting areas, especially near the poles.

metadata

Data about data that describes the characteristics, origin, and context of information in a surveying project.

metes and bounds

A system of describing land by measuring distances and directions from identifiable physical features or landmarks.

miniprism

A small reflective prism used in surveying and geodetic measurements to reflect laser signals back to their source for distance calculations.

Mobile Mapping

Mobile mapping is a surveying technique that uses vehicles equipped with sensors and cameras to rapidly collect geospatial data across large areas.

monitoring survey

A systematic and continuous measurement process used to track changes in physical features, structures, or environmental conditions over time.

monument

A permanent marker or structure established at a surveying point to mark its location and preserve its position for future reference.

Multibeam Echo Sounder

A hydrographic surveying instrument that uses multiple acoustic beams simultaneously to map underwater bathymetry and seafloor characteristics with high resolution and coverage.

multibeam sonar

A sonar system that emits multiple acoustic beams simultaneously to map the seafloor and detect underwater objects across a wide swath.

multipath

The phenomenon where GNSS signals reach a receiver via multiple paths due to reflection off nearby surfaces, causing measurement errors.

multipath error mitigation

Techniques used in surveying to reduce errors caused by signal reflections bouncing off nearby surfaces before reaching the receiver.

mvs

Mvs ay isang mahalagang sistema sa surveying na ginagamit upang masukat at magrehistro ng mga spatial data sa pamamagitan ng modernong teknolohiya.