Nyckelbegrepp inom professionell mätning och geospatial teknik.
HDOP ay isang sukat ng pahalang na katumpakan ng GPS na nakabase sa spatial arrangement ng mga satellite.
The angle measured in a horizontal plane between two lines of sight from a surveying instrument.
The measurement of horizontal angles using the graduated circle on a surveying instrument, typically a theodolite or transit, to determine angular positions between points.
A reference surface or vertical plane used to measure water depths, tidal heights, and water-related elevations in surveying and mapping applications.
A specialized surveying process that measures and maps underwater topography, water depths, and coastal features for navigation and marine resource management.