GRB

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  • p

  • Point Symbols
    Geometric symbols used to represent real-life phenomena and/or specific locations (i.e., triangles, circles, etc…).
  • Point-based Watersheds
    Deriving waterhsed based on Pour Points.
  • Point-in-Polygon Overlay
    GIS 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 Analysis
    Point 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.
  • Pointers
    Programming object whose value refers (points) to another value at a different location in the system.
  • Polar Coordinates
    A 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 Motion
    Oscillation of the point where Earth's rotational axis intersects the surface with respect to a reference datum.
  • Polar Plot
    Diagram of satellite tracks with the observer's zenith at the center and horizon represented as the perimeter.
  • Polar Stereographic Projection
    Stereographic projection set at the Poles of the Earth.
  • Polarization
    Wave Property. Only found in Transverse wave, where polarized waves only oscillates in a single direction.
  • Polyconic Projection
    Map Projection where all parallels are non-concentric circular arcs, with the exception of equator that is a straight line.
  • Polygon
    A closed shape, made up of a series of (x,y) coordinate with the starting and ending point having the same coordinate.
  • Polygon Traverse
    Type of Traverse, where lines (runs) return to starting point forming a closed figure (geometrically and mathematically closed).
  • Polygon-on-Polygon Overlay
    GIS operation (vector overlay) where polygons on one dataset are overlaid onto polygons of another to determine location of different polygons.
  • Polymorphism
    Object-Oriented Programming principle where the same method can have different effect on different types of objects.
  • Polynomial Regression
    A form of linear regression presents the relationship between the independent variable x and the dependent variable y modelled as an nth degree polynomial.
  • Polynomial Transformation
    Consisting of computing the polynomial with a given function of the roots of polynomial, often used to simplify the solution of algebraic equations.
  • POLYVRT
    Polygon Converter Model
  • Population Density
    Number of people as per a specific area (e.g. number of people per square meter).
  • Pore pressure
    Pressure of underground water within soil or between particles.
  • Porosity
    A measure of space in rocks, between grains, or within cracks.
  • Posigrade Orbit
    When satellite rotates in the same direction as the rotation of the Earth.
  • Positional Dilution of Precision
    Positional (3D) component of DOP.
  • Positional Error
    Error in data affecting the measuring/calculation of position, could be an effect from accuracy and/or precisionof measured results.
  • Positioning
    In GPS, it refers to the modes of determining coordinates, which can be a combination of static/kinematic positioning and point/relative positioning.
  • Post-Processing
    Image editing in photography after they emerge from the scan converter and before they are displayed
  • Pour Points
    Points of interests for Point-based Watersheds (i.e., individual streams, dams, etc…).
  • Power Series
    An infinite series that is similar to a polynomial with infinite number of terms.
  • PPE
    Personal Protective Equipment
  • PPK Mode
    Post-Processed Kinematic Mode
  • PPM
    Parts Per Million
  • PPMCC
    Pearson's Product-Movement Correlation Coefficient
  • PPS
    Precise Positioning Service
  • PRC
    Pseudorange Correction
  • Pre-Processing
    Image pre-process before analysis, involves the correction of distortion, degradation, and noise introduced during the imaging process.
  • Precise Code
    Restricted code reserved for military application, modern encrypted signals are referred to as P(Y)-Code.
  • Precise Levelling
    Refined technique of levelling that uses precise instruments to ensure precision of work, where greater accuracy is possible.
  • Precise Point Positioning
    Positioning 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.
  • Precision
    Degree of refinement (sensitivity) of observed quantities.
  • Prescriptive Model
    GIS model that predics the future possible condition of the spatial data.
  • Primary color
    Blue,green, red,colors used to mix and produce new color.
  • Primary Data
    Data/information collected specifially for the purpose of the project, 'straight from the source'.
  • Primary Identifier
    A distinct set of information/data that enables the differentiation between different sets of data.
  • Primary Key
    Attribute that can uniquely identify a record/entity on a data table.
  • Prime Meridian
    A Meridian of longitude defined to be 0ᵒ.
  • Priming the Tide
    Tidal effects when Moon is between quadrature and New/Full moon.
  • Principal Component Analysis
    A 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 Point
    The point at which perpendicular projected across the center of the lens intersects the photograph.
  • Principal Scale
    Scale of reference globe.
  • Prism Load
    Weight of soil (in the form of a prism) above target (e.g. pipe).