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- Standard ErrorSee definition on Standard Deviation.
- Standard LineLine on sphere with no distortion (length expansion/compression) after projection, generally in the form of the equator/standard parallel or central meridian.
- StandardsCertain level of quality as described by industry.
- Static ModelModel dealing with data at a specific state (e.g., data at a specific time).
- Static PositioningDetermination of position where receivers are stationary on Earth's surface.
- Static SurveyWhere at least two stationary GPS recievers simultaneously and continuously cleect data from the same constellation of satellites during a long observation session.
- Statistical MapMap showing variation in quantity (statistics) for specified area, generally expressed as a choropleth map.
- Statutory LiabilityLiability of the party held responsible for actions or omissions due to related law.
- Stefan-Boltzmann LawM=σT4,To express the amount of energy an object radiates, where M=total radiant exitance from the surface of material, σ=Stefan-Boltzmann constant,5.6697*10-8 Wm-2 K-4
- Stepped FrequencyWhere frequency of signal changes in descrete, repeatable and stable steps.
- Stereographic ProjectionMap Projection, where angular and circular properties are preserved.
- StereopairSteropair is a pair of stereo photographs taken form the same area but differen position,consisting of adjacent pair of overlapping vertical photographs in the stereoscopic coverage
- StereoplottingThe plotting of a map from aerial photographs taken by a stereoscopic device
- SteroscopyA technique used to create or enhance the illusion of depth in an image.
- Stilling WellAn installation, usually in form of a circular pipe, that is connected to a canal/ditch/stream by an inlet pipe, used to measure water stages without the effect of surges or choppy waters.
- StipplingCreation of patterns in varying shades (solidarity) using dots.
- Stochastic ErrorA term added to a regression equation to introduce all variations in Y that cannot be explaines, including the Xs.
- Stochastic InterpolationInterpolation based on assessment of prediction errors and estimated variances.
- Stochastic ModelMathematical model that takes into account randomness in variables.
- Stochastic SignalSignal with some degree of uncertainty.
- Stop-and-Go PositioningSee definition on Kinematic Survey/Method.
- StopcockValve to restrict flow of liquid or gas through a pipe.
- Stratified SamplingUsually used in census and population surveys, it is a process for dividing the full survey area into stratas (sub-regions with population of simiar characteristics) then sampling the sub-regions in proportion to its contribution to the overall picture.
- StringA sequence of textual values (alphbets, numbers, symbols) that can have fixed length.
- StripsStrips are parts of successive flight which is for large site study. Multiple strips comprise block.
- Structured Query LanguageData manipulation and query language designed for relational databases.
- Structured Systems Analysis and Design MethodologySee definition on Hard Systems Analysis.
- Sub-bottom ProfilingUse of low frequency SONAR to enable acoustic beams to penetrate seafloor, to enable characterization and identification of layers of sediments under seafloor.
- Sub-structionUnderlying structure or supporting part during fabrication.
- SubdivisionAct of dividing land into parcels for urban planning.
- Subdivision SurveysType of Cadastral Survey, used to establish ownership boundary for new lots/boundary.
- Substantial knowledgeThe lowest level of understanding in which there relationships between basic concepts and interrelated disciplines are established.
- Subsurface UtilitiesUtility network under ground surface (buried).
- SummarizeTo briefly refine essential elements from the detailed content.
- Supervised ClassificationA tool used to extract quantitative information from remote sensing image with the operator's professional knowledge and experience, corresponding to unsupervised classification
- Surface AnalysisAnalyzing properties of physical surfaces displayed on Image/Map
- SurgeHorizontal, linear longitudinal movement (front-back) on X-axis.
- Survey AdjustmentMathematical processes of adjusting measurements from survey.
- Survey StandardsControl over accuracy and precision of survey data.
- Suspended SedimentParticles suspended in water.
- SustainabilityAbility to sustain, to have long-term support.
- SVGScalable Vector Graphics
- SwathA strip/land on seafloor scanned by Swath System.
- Swath SystemA class of SONAR using a multi-beam system to obtain sounding information from a single ship's track.
- SwayHorizontal, linear lateral movement (left-right, side-to-side) on Y-axis.
- SweepScanning of designated area to verify presence of objects under land/water surface.
- Sweep SystemMultiple single-beam echosounder placed along the boom of a vessel, enabling a larger coverage of the seabed.
- SwellSimilar to waves, it is a character of water, but it can grow over time and will not break in open waters.
- Switchyard ConversionData Exchange, where data is first translated into one internal standard then depending on output system, it translates the internal standard to the suitable output format.
- SymbolizationRepresentation of objects and/or real-life phenomena with pictorial and/or geometric symbols.