GRB

AJAX progress indicator
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  • s

  • Spatial Data Infrastructure
    Data infrastructure implementation framework for geographical (spatial) data, metadata, user and tools.
  • Spatial Data Organization Information
    Metadata category, information about representation and structure of dataset (e.g., raster, vector).
  • Spatial Data Transfer Standard
    Neutral Format for transfer of spatial data, uses 'profiles' to transfer data. Type: 1) Topological Vector Profile (TVP) 2) Raster Profile and Extensions (RPE) 3) Transportation Network Profile (TNP) 4) Point Profile 5) Computer Aided Design and Drafting Profile (CADD)
  • Spatial Dependence
    Spatial relationship between variables, where values are dependent on the location/postion.
  • Spatial Effect
    Factors which cause the same types of features at a known point in time to create various characteristics at different geographic locations.
  • Spatial Feature
    Generally refers to spatial objects' instantaneous geometric feature and relationship.
  • Spatial Filter
    A tool used to mphasize or deemphasize image data of different spatial frequencies.
  • Spatial Filtering
    An image operation using a function of the intensities of pixels in a neighbor to change each pixel value I(u,v).
  • Spatial Frequency
    The roughness of the tonal variations in the image.
  • Spatial Heterogeneity
    Refers to the uneven distribution of different concentrations of each species in a specific area.
  • Spatial Join
    An operation where fields from a particular layer's attribute table are appended (added) onto another layer's attribute table
  • Spatial Query
    A special type of database query operation provided by geospatial databases.
  • Spatial Reference
    See definition on Georeferencing.
  • Spatial Reference Information
    Metadata category, information about frame of reference for dataset (e.g., coordinate system, projection, map parameters, etc…).
  • Spatial Relationship
    Refers to the situation that an object is located in space related to other reference objects.
  • Spatial Resolution
    The size of smallest object can be detected.
  • Spatial Sampling
    Collection of a limited set of data that measures a particular phenomena that can be used to predict the same phenomena at another geographical location with similar characteristics.
  • Spatio-temporal Correlation
    Indicates the trend or correlation of phenomena and objects by the consideration of spatio as well as temporal factors.
  • Spatio-temporal Phenomena
    The phenomena happened simultaneously because of spatiao and temporal reasons.
  • SPCS
    State Plane Coordinate System
  • Spectral Classes
    Clusters of data of similar reflectance value.
  • Spectral Ratioing
    Enhanced iamge resulting from the division of DN values in two spectral band.
  • Spectral Reflectance
    The way which objects can reflect and/or absorb radiation.
  • Spectral Reflectance Curve
    A graph of the spectral reflectance of an object as a function of wavelength.
  • Spectral Sensitivity
    The relative efficiency of detection of radiation as a function of frequency or wavelength.
  • Spectral Signature
    A pattern which is absolute and unique of an objectand measured by remote sensors
  • Sphere
    A perfectly round geometrical and circular object in three-dimensional space which is like a completely round ball.
  • Spherical Aberration
    Defects caused be the lens in telescope preventing the focusing of light rays.
  • Spherical Coordinate System
    Coordinate system for 3D space specified by three numbers: radial distance from point of origin, polar angle measured from zenith, azimuth angle at orthogonal projection (r, θ, ϕ).
  • Spherical Error Probable
    Measure of 3D precision.
  • Spiral Curve
    Used to provide a gradual change in curvature and superelevation between tangent and curved section.
  • Spline
    Polynomial function to approximate smooth curve.
  • Spline Text
    Text string aligned with line feature.
  • Split
    GIS operation to divide the input layer into multiple layers.
  • Split Route
    A single route subdividing into multiple routes.
  • SPOT
    System Pour d'Observation de la Terre
  • Spot Heights
    Height/altitude of a point as shown on a map.
  • Spread Spectrum
    A signal that has been deliberately spread over a bad wider than than the minimum requried for carrying information, it gives higher resistance to signal jamming and multipath.
  • Spreading Loss
    Where loss can be an effect of the nature of the target, that energy loss is an effect of wave spread.
  • Spring Tide
    Tide that occurs in New and Full Moon, resulting in a higher tide.
  • SPS
    Standard Positioning Service
  • Sputnik
    Radio navigation system based on Earth-orbiting satellite.
  • SQL
    Structured Query Language
  • Squat
    The settlement of the boat into a lower profile in the water as it increase its velocity, can cause error in depth measurement.
  • Squat Test
    Test to determine the relationship between boat speed and transducer height.
  • SSADM
    Structured Systems Analysis and Design Methodology
  • SSM
    Soft Systems Methodology
  • Stadia Mark
    Marks set at a specific distant apart (Stadia Constant) on the telescope.
  • Stakeholders
    Parties/People with vested interest in the project/location.
  • Standard Deviation
    A measure used to quantify the amount of variation or distribution of a set of data values.