Ordlista

Nyckelbegrepp inom professionell mätning och geospatial teknik.

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foundation survey

A comprehensive measurement and assessment of ground conditions, levels, and structural requirements before construction begins.

Free Station

A surveying method where an instrument is set up at an arbitrary point not on an existing control network, with its position and orientation determined through backsights to known points.

Galileo GNSS

Galileo is the European Union's global navigation satellite system providing positioning, navigation, and timing services worldwide.

GCP

GCP ay ang abbreviasyon para sa Ground Control Point, isang tukoy na lokasyon na may kilalang coordinate na ginagamit sa surveying at mapping.

GDOP

GDOP ay isang sukatan ng geometric na kalidad ng mga satellite na posisyon para sa GPS positioning accuracy.

Geodesy

The science of measuring and mapping the Earth's physical features and gravitational field.

Geofencing

A location-based technology that uses GPS, RFID, or cellular data to create virtual boundaries around geographic areas and trigger automated actions when devices enter or exit these zones.

geoid

The equipotential surface of Earth's gravitational field that best approximates mean sea level and serves as the reference for measuring elevations.

geoid undulation

The vertical distance between the ellipsoid and the geoid at any given point on Earth's surface.

Geomatics

Geomatics is the discipline of gathering, storing, processing, and delivering geographic data and information using integrated systems of sensors, computers, and analytical methods.

Georectification

The process of aligning and correcting geographic data to match a known coordinate system and remove distortions.

Georeferencing

The process of assigning geographic coordinates to spatial data or images to align them with a real-world coordinate system.

Geospatial Data

Information that identifies the geographic location and characteristics of natural or constructed features and boundaries on Earth.

GeoTIFF

GeoTIFF is a standardized image format that embeds geographic coordinate information directly into TIFF files, enabling precise spatial referencing of raster data.

gimbal

A pivoted support that allows an object to rotate freely on multiple axes, commonly used in surveying instruments to maintain level orientation.

GIS (Geographic Information System)

GIS yra komputerinė sistema, kuri saugo, analizuoja ir vizualizuoja geografinius duomenis erdvinėms problemoms spręsti.

GLONASS

GLONASS is a Russian satellite navigation system that provides positioning, navigation, and timing services globally.

GNSS

GNSS ay isang pandaigdigang sistema ng satellite navigation na nagbibigay ng tumpak na lokasyon at oras sa mga receiver sa buong mundo.

GNSS Signal Processing

GNSS Signal Processing refers to the techniques and methods used to acquire, track, and decode signals from Global Navigation Satellite System satellites to determine precise positioning and timing information.

GNSS天线

GNSS天线是接收全球导航卫星系统信号的关键设备,用于测量和定位应用中获取卫星信号。

GPS

GPS est un système de positionnement par satellite utilisé en arpentage pour déterminer les coordonnées précises de points sur la surface terrestre.

GPS Week

A timekeeping unit in the GPS system that consists of 604,800 seconds and is used for precise timing and positioning calculations.

Grade Control

The process of establishing and maintaining correct elevation levels during construction and surveying operations.

ground filtering

A surveying technique that removes non-ground points from LiDAR data to create accurate digital terrain models.

GRS80

GRS80 is the Geodetic Reference System of 1980, an international standard ellipsoid used for geodetic surveys and mapping worldwide.

GSD

GSD ay ang ground sample distance na sumusukat sa spatial resolution ng mga aerial at satellite imagery sa surveying.

HDOP

HDOP ay isang sukat ng pahalang na katumpakan ng GPS na nakabase sa spatial arrangement ng mga satellite.

Horizontal Angle

The angle measured in a horizontal plane between two lines of sight from a surveying instrument.

Horizontal Circle Reading

The measurement of horizontal angles using the graduated circle on a surveying instrument, typically a theodolite or transit, to determine angular positions between points.

Hydrographic Datum

A reference surface or vertical plane used to measure water depths, tidal heights, and water-related elevations in surveying and mapping applications.

hydrographic survey

A specialized surveying process that measures and maps underwater topography, water depths, and coastal features for navigation and marine resource management.

ICP Algorithm

ICP (Iterative Closest Point) is a fundamental algorithm used in surveying and geomatics to align and register point clouds by iteratively matching corresponding points between datasets.

ICP Iterative Closest Point

ICP ay isang algorithm na gumagamit ng iterative na proseso upang mahanap ang pinakamahusay na pagkakahanay (alignment) sa pagitan ng dalawang point clouds sa 3D space.

IFC

IFC ay isang bukas na pamantayan para sa pagbabahagi ng impormasyon sa industriya ng konstruksyon at real estate.

IFC - Industry Foundation Classes

An open international standard data model for representing building and infrastructure information across different software platforms and disciplines.

Integer Ambiguity Resolution

The process of determining the correct whole number of wavelengths in carrier phase measurements for precise GNSS positioning.

Intensity

The measure of the strength or magnitude of a physical quantity, such as light, sound, or electromagnetic radiation, per unit area or volume.

intersection survey

A surveying method that determines the position of an object by measuring angles from two or more known reference points.

iono free

Iono free ay isang teknika sa surveying na gumagamit ng ionospheric-free linear combination upang alisin ang ionospheric delay mula sa satellite observations.

ionospheric delay

The propagation delay of electromagnetic signals caused by free electrons in the ionosphere affecting GNSS positioning accuracy.

ISO 17123

International standard that specifies field procedures for testing and verification of surveying instruments to ensure accuracy and reliability in measurement.

ISO 19650 BIM Standards

International standards for information management using Building Information Modeling in the built environment across design, construction, and operational phases.

Kinematic GNSS

A real-time surveying technique using Global Navigation Satellite System signals to determine precise positions of moving or stationary objects with centimeter-level accuracy.

KML/KMZ

KML (Keyhole Markup Language) and KMZ (compressed KML) are file formats used to store and display geographic data, maps, and spatial information in surveying and GIS applications.

L1 L2 L5

GNSS频率带的三个主要信号频段,用于全球定位系统和其他卫星导航系统的精密测量。

las format

Las format ay isang binary file format na ginagamit para sa pag-store ng 3D point cloud data mula sa LiDAR surveys at iba pang surveying instruments.

las lidar format

LAS is a standardized binary file format for storing three-dimensional point cloud data acquired through Light Detection and Ranging (LiDAR) technology.

Layout Survey

A surveying method used to transfer design plans and specifications from drawings onto the ground for construction purposes.

LAZ Format

LAZ format is a compressed point cloud data format commonly used in surveying and geospatial applications to efficiently store and transmit LiDAR data.

Least Squares

A mathematical method for finding the best-fitting line or curve through a set of data points by minimizing the sum of squared residuals.

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