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- Point SymbolsGeometric symbols used to represent real-life phenomena and/or specific locations (i.e., triangles, circles, etc…).
- Point-based WatershedsDeriving waterhsed based on Pour Points.
- Point-in-Polygon OverlayGIS operation (vector overlay) where points on one dataset are overlaid onto polygons of another to determine the location of points on the polygon.
- Point-Pattern AnalysisPoint pattern analysis is the study of the spatial arrangements of points in (usually 2-dimensional) space. The simplest formulation is a set X = {x ∈ D} where D, which can be called the 'study region,' is a subset of Rn, a n-dimensional Euclidean space.
- PointersProgramming object whose value refers (points) to another value at a different location in the system.
- Polar CoordinatesA point (P) in the system is recorded with the distance (d) and angle (θ) from the point of origin (O), taking into consideration the chosen reference direction (R).
- Polar MotionOscillation of the point where Earth's rotational axis intersects the surface with respect to a reference datum.
- Polar PlotDiagram of satellite tracks with the observer's zenith at the center and horizon represented as the perimeter.
- Polar Stereographic ProjectionStereographic projection set at the Poles of the Earth.
- PolarizationWave Property. Only found in Transverse wave, where polarized waves only oscillates in a single direction.
- Polyconic ProjectionMap Projection where all parallels are non-concentric circular arcs, with the exception of equator that is a straight line.
- PolygonA closed shape, made up of a series of (x,y) coordinate with the starting and ending point having the same coordinate.
- Polygon TraverseType of Traverse, where lines (runs) return to starting point forming a closed figure (geometrically and mathematically closed).
- Polygon-on-Polygon OverlayGIS operation (vector overlay) where polygons on one dataset are overlaid onto polygons of another to determine location of different polygons.
- PolymorphismObject-Oriented Programming principle where the same method can have different effect on different types of objects.
- Polynomial RegressionA form of linear regression presents the relationship between the independent variable x and the dependent variable y modelled as an nth degree polynomial.
- Polynomial TransformationConsisting of computing the polynomial with a given function of the roots of polynomial, often used to simplify the solution of algebraic equations.
- POLYVRTPolygon Converter Model
- Population DensityNumber of people as per a specific area (e.g. number of people per square meter).
- Pore pressurePressure of underground water within soil or between particles.
- PorosityA measure of space in rocks, between grains, or within cracks.
- Posigrade OrbitWhen satellite rotates in the same direction as the rotation of the Earth.
- Positional Dilution of PrecisionPositional (3D) component of DOP.
- Positional ErrorError in data affecting the measuring/calculation of position, could be an effect from accuracy and/or precisionof measured results.
- PositioningIn GPS, it refers to the modes of determining coordinates, which can be a combination of static/kinematic positioning and point/relative positioning.
- Post-ProcessingImage editing in photography after they emerge from the scan converter and before they are displayed
- Pour PointsPoints of interests for Point-based Watersheds (i.e., individual streams, dams, etc…).
- Power SeriesAn infinite series that is similar to a polynomial with infinite number of terms.
- PPEPersonal Protective Equipment
- PPK ModePost-Processed Kinematic Mode
- PPMParts Per Million
- PPMCCPearson's Product-Movement Correlation Coefficient
- PPSPrecise Positioning Service
- PRCPseudorange Correction
- Pre-ProcessingImage pre-process before analysis, involves the correction of distortion, degradation, and noise introduced during the imaging process.
- Precise CodeRestricted code reserved for military application, modern encrypted signals are referred to as P(Y)-Code.
- Precise LevellingRefined technique of levelling that uses precise instruments to ensure precision of work, where greater accuracy is possible.
- Precise Point PositioningPositioning technique that relies on both Code and Phase observations, different from DGPS, PPP combines precise clock and orbit calculations from global network to precisely calculate position of a single reciever.
- PrecisionDegree of refinement (sensitivity) of observed quantities.
- Prescriptive ModelGIS model that predics the future possible condition of the spatial data.
- Primary colorBlue,green, red,colors used to mix and produce new color.
- Primary DataData/information collected specifially for the purpose of the project, 'straight from the source'.
- Primary IdentifierA distinct set of information/data that enables the differentiation between different sets of data.
- Primary KeyAttribute that can uniquely identify a record/entity on a data table.
- Prime MeridianA Meridian of longitude defined to be 0ᵒ.
- Priming the TideTidal effects when Moon is between quadrature and New/Full moon.
- Principal Component AnalysisA statistical procedure that uses an orthogonal transformation to convert a set of observations of possibly correlated variables into a set of values of linearly uncorrelated variables called principal components.
- Principal PointThe point at which perpendicular projected across the center of the lens intersects the photograph.
- Principal ScaleScale of reference globe.
- Prism LoadWeight of soil (in the form of a prism) above target (e.g. pipe).