GRB

AJAX progress indicator
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  • f

  • Frequency Modulation
    Modulation of radio wave by frequency, where amplitude remains constant.
  • Frequency-Domain
    Where frequency of signal constantly varies with time.
  • Fresnel Region
    Region of electromagnetic field around antenna.
  • FS
    Foresight
  • Full-Spectral Colour
    Colours in the full (light) spectrum.
  • Function-Oriented Design
    Program design based on functions of the program and its interaction with the centralized shared memory.
  • Fundamental Knowledge
    The middle level of understanding, where base knowledge (e.g. basic concepts, components and functions) should be mastered.
  • Fuzzy
    A logic form of many-valued logic which deals with reasoning that is approximate rather than fixed and exact
  • Fuzzy Classification
    A classsification approach aims to deal with the mixed-pixel problem by applying the fuzzy logic concept.
  • Fuzzy Set
    Collection of elements defined by degree of membership, grading members on a continuous scale that members can have partial and/or uncertainty in their membership.
  • Fuzzy Sets
    Elements in the sets have degrees of membership.
  • Fuzzy Tolerance
    Distance tolerance between vertices, vertices within fuzzy tolerance are merged to a single common location.
  • g

  • G-Test
    Test of goodness, likelihood of statistical significance, measure of variation of data from an ideal prediction.
  • Gain
    Process of amplifying signal to match range of display.
  • Galileo
    A European global satellite navigation system.
  • Gamut
    Complete subset of certain colours (e.g. CYMK, RGB).
  • GANTT Charts
    Graphical charts for project management.
  • Gap Analysis Program
    A multi-level program across state,region and nataion built to offer geographic data and other infamation about natural vegetation,distribution of native vertebrate species and land ownership.
  • Gap Closure Tolerance
    Vectorization setting on GIS software, detemines the number of pixels that can be jumped over in a raster.
  • Gaussian Distribution
    A continuous probability distribution presents the probability that any real observation will fall between any two real limits or real numbers, as the curve approaches zero on either side.
  • Gaussian Elimination
    An algorithm used to solve systems of linear equations
  • Gazetteer
    Geographical dictionary, containing list of geographical names and terms, used with a map.
  • GBAS
    Ground-Based Augmentation System
  • GCMD
    Global Change Master Directory
  • GCP
    Ground Control Point
  • GDOP
    Geometric/General Dilution of Precision
  • General Reference Map
    Map with the objective of showing locations (points of interests) and features (e.g., roads, coastlines, water bodies, etc…), map without a specific purpose.
  • General Systems Theory
    Study of Systems in general, attempt to describe/model the real world phenomena into a set of structured processes and networks.
  • Generalization
    Technique for presenting information/data on the map in order to represent a certain concept or to make it easier to understand. Type: 1) Selection 2) Simplification 3) Displacement 4) Smoothing 5) Enhancement 6) Dissolution 7) Segmentation 8) Aggregation 9) Conversion 10)(...)
  • GEO
    Geosynchronous Equatorial Orbit
  • Geo-demography
    Description of population according to location (spatial information), analysis of demographic data by spatial attributes.
  • Geocentric Coordinate
    Earth-centered coordinate system defined as Cartesian (X, Y, Z).
  • Geocentric Latitude
    Latitude with center of Earth as reference.
  • Geocentric Orbit
    Orbits of Satellites (natural and man-made) around the Earth, classifcations of orbits can be by: Altitude, Inclination, Eccentricity, Direction, and Geosynchronous.
  • Geocode
    Assigning additional positional information (e.g., address) to a location/feature, enriching the description of a location.
  • Geocomputation
    Application of IT to spatial problems (e.g., collection, storage, visualization, modelling of spatial data).
  • Geodesy
    Science of measuring and understanding of Earth's geometry and geometric shapes, orientation in space and positioning of points on its surface.
  • Geodetic Control Network
    A network of pre-established points that are physically marked and are precisely located and documented, they form a base to which coordinates can reference into.
  • Geodetic Coordinate
    A set of reference points used for positioning as defined by WGS84.
  • Geodetic Height
    See defintion on Ellipsoidal Height.
  • Geodetic Latitude
    See definition on Latitude.
  • Geodetic Survey
    Branch of surveying of the highest order to establish position using various means (e.g. GPS).
  • Geographic Coordinate System
    Often using Latitude, Longitude and Elevation as units, it is a system to enable positioning and locating points on Earth's surface by a set of values.
  • Geographic Phenomena
    An occurance observed in nature (e.g., trees, hills, rivers, etc…).
  • Geographically Weighted Regression
    Geographically weighted regression is a local modelling technique used to generates parameters disaggregated by the spatial units of analysis.
  • Geoid
    A model of global mean sea level,used to measure precise surface elevations.
  • Geoid Undulation
    The distance between the mean sea leavel and the heitht provided by WGS84 coordinate system, which used the ellipsoid as reference.
  • Geoidal Height
    Difference between Geodetic Height and Orthometric Height.
  • GEOINT
    Geospatial Intelligence
  • Geological Structures
    A result from tectonic forces that causes rocks to fold and break, forming mountains, valleys and faults.