Surveying Glossary — Letter P

Istilah kunci dalam survei profesional dan teknologi geospasial.

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parcel boundary

The legally defined perimeter line that separates one land parcel from adjacent properties or public lands.

pdop

Pdop ye medida da kalidad da sinyales GPS baseada en posisyon ng mga satelite.

Phase Shift

A change in the phase angle of a wave or signal relative to a reference point or time.

photogrammetry

The science and technology of obtaining reliable information about physical objects and the environment through the process of recording, measuring, and interpreting photographic images.

Pipeline Survey

A comprehensive measurement and mapping process used to determine the precise location, elevation, and condition of pipeline infrastructure for design, construction, and maintenance purposes.

pix4d

Pix4d is a software platform that processes drone imagery and aerial data to create precise 3D maps, orthomosaics, and point clouds for surveying and mapping applications.

plat map

A detailed map showing the divisions of a piece of land into lots, blocks, and streets, used for legal property identification and real estate transactions.

plumb bob

A weight suspended from a string used to determine vertical direction in surveying and construction.

plumb line

A string or wire with a weight attached used to determine vertical direction in surveying and construction.

Point Cloud

A large collection of three-dimensional data points obtained through surveying techniques that represent the surface geometry of physical objects or environments.

Point Cloud Classification

The process of categorizing individual points in a three-dimensional point cloud dataset according to their object type, material, or other characteristics.

point cloud registration

The process of aligning multiple point clouds in a common coordinate system to create a unified 3D model.

pole

A vertical staff or rod used in surveying to mark points and measure distances and elevations.

ppk

Teknik pemosisian diferensial presisi tinggi menggunakan data satelit GPS pasca-pemrosesan untuk aplikasi survei profesional.

PPK Drone

A drone equipped with Post-Processing Kinematic (PPK) technology for high-accuracy surveying and mapping applications.

ppm

Ppm ni isang yunit ng pagsusukat na kumakatawan sa bahagi bawat milyun, karaniwang ginagamit sa surveying upang ipahayag ang mga napakaliit na halaga tulad ng mga error sa pagsukat.

PPP (Precise Point Positioning)

A surveying technique that uses satellite signals from a single GNSS receiver to determine positions with centimeter-level accuracy without requiring reference stations.

Precise Point Positioning

A GNSS surveying technique that achieves centimeter to millimeter-level accuracy using corrections derived from global reference station networks.

Precision Accuracy

Precision accuracy refers to the degree of closeness between repeated measurements and their true values in surveying operations.

prism constant

A fixed correction value applied to electronic distance measurements made with a reflective prism to account for the optical geometry of the prism itself.

prism reflector

An optical device that reflects and refracts light through prisms to redirect survey signals for precise measurements.

Projekcija Karte

Matematički sistem za prenošenje trodimenzionalne površine Zemlje na dvodimenzionalnu površinu karte.