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Introduction to Vertical Coordinate Systems

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 Shaw, Javier Jimenez

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Introduction to Vertical Coordinate Systems
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156
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CC Attribution 3.0 Unported:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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This educational talk will explain why we need a vertical reference for our coordinates, how we define "up" and "height". How elevations were measured in the past, and how we now use GNSS to do it, and the implications of that. What is "the geoid" (gravitational model of the earth) and its differences with respect to the ellipsoid. Different types of heights (orthometric, normal, dynamic) and how we use different geoid models. Finally I will talk about how PROJ.org (open-source library) is supporting vertical coordinate reference systems with the grid files available in PROJ-data (open-data).
Keywords
00:00
Coordinate systemSystem programmingVertical directionSoftware developerSoftwareCivil engineeringWater vaporSurfacePhysical systemModel theoryArithmetic meanLevel (video gaming)Physical systemCodeVertex (graph theory)InformationProfil (magazine)Water vaporBitModel theorySoftware developerWeb pageÄquipotenzialflächeLevel (video gaming)Context awarenessCivil engineeringDirect numerical simulationGraphical user interfaceVideo gameComputer animation
00:52
Water vaporGravitationRule of inferenceLogical constantOrder of magnitudeLiquidSurfaceVector potentialObject (grammar)DataflowPoint (geometry)WikiVertical directionGreatest elementWeightString (computer science)Near-ringWater vaporShape (magazine)SurfaceMultiplication signString (computer science)Food energyInterpreter (computing)Line (geometry)Probability density functionWeb pageGravitationPoint (geometry)Descriptive statisticsMedical imagingPlanningYouTubeVector potentialRule of inferenceCivil engineeringConstructor (object-oriented programming)MassPopulation densityDirection (geometry)Thermodynamic equilibriumBitDistanceLevel (video gaming)Gravitational potentialÄquipotenzialflächeLatin squareOrder of magnitudeBuildingSphereKey (cryptography)FrictionMeasurementRight angleComputer animation
05:32
Vertical directionGamma functionWeightGreatest elementString (computer science)SurfaceLevel (video gaming)Measurement19 (number)DreiecksnetzComputer networkArchaeological field surveyComputer reservations systemCodeResource allocationDistanceLine (geometry)Point (geometry)Similarity (geometry)Near-ringSlide ruleSoftwareArchaeological field surveyMetreLoop (music)Error messageVertex (graph theory)AreaPhysical systemMeasurementRight angleEvent horizonNeuroinformatikMultiplication signLogicSurfaceTriangulation (psychology)Maxima and minimaCivil engineeringImplementationSatelliteGravitationBitCoordinate systemArithmetic meanLevel (video gaming)Cartesian productConstructor (object-oriented programming)Instance (computer science)Different (Kate Ryan album)Compilation albumTouch typingCASE <Informatik>Dot productGoodness of fitSet (mathematics)Diallyl disulfideSystem of linear equationsComputer animation
12:24
EllipsoidSurfaceShape (magazine)GravitationTheorySmoothingRotationGAUSS (software)Distribution (mathematics)MassAerodynamicsVector potentialPoint (geometry)Computer reservations systemBLACK MAGICMathematicsModel theorySatelliteVertical directionInflection pointCoordinate systemPhysical systemInterpolationImplementationEstimationComputer-generated imageryType theoryRight angleLine (geometry)Field (computer science)SurfaceModel theoryPhysical systemGravitationSatelliteImplementationPoint (geometry)Inflection pointWell-formed formulaDifferenz <Mathematik>AdditionCoordinate systemVertex (graph theory)MathematicsLevel (video gaming)Different (Kate Ryan album)MetreCase moddingInstance (computer science)EllipsoidUniform resource locatorComputer reservations systemInformationWaveSpecial unitary groupRotationNumberTransformation (genetics)Position operatorMeasurementMedical imagingOrder (biology)AngleArc (geometry)InterpolationNeuroinformatikThree-dimensional spaceActive contour modelRevision controlNegative numberÄquipotenzialflächeArithmetic meanFlow separationComputer animation
19:07
Vertical directionModel theoryPhysical systemPoint (geometry)Transformation (genetics)System programmingSoftwareComputer configurationMaxima and minimaWechselseitige InformationLine (geometry)Gamma functionArc (geometry)Utility softwareProjective planeLink (knot theory)SoftwareDifferent (Kate Ryan album)Model theoryLevel (video gaming)FrequencyPhysical systemMultiplication signVertex (graph theory)InformationField (computer science)MappingInstance (computer science)BitFile formatInformation security1 (number)Image resolutionRevision controlRight angleFlow separationDialectoutputOpen sourcePoint (geometry)Standard deviationIdentifiabilityNumberMathematicsComputer file19 (number)MetreArithmetic meanMedical imagingGravitationService (economics)GeometryDatabaseCASE <Informatik>Computer reservations systemMereologyUniverse (mathematics)Raster graphicsCodeProper mapContent delivery networkComputer animationLecture/Conference
25:49
Least squaresGeometryComputer-assisted translationComputer animation
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