What are map projections?Projection basics for GIS professionalsThe geoid, ellipsoid, spheroid and datum, and how they are relatedIdentifying an unknown coordinate systemConverting Degrees Minutes Seconds values to Decimal Degree valuesWhat are geographic coordinate systems?Spheroids and spheresDatumsNorth American datumsWhat happens to features at +/-180 (dateline)?GCS_Assumed_Geographic_1What are projected coordinate systems?About map projectionsProjection typesConic projectionsCylindrical projectionsPlanar projectionsOther projectionsProjection parametersChoosing an appropriate transformationGeographic transformation methodsEquation-based methodsGrid-based methodsWhat are vertical coordinate systems?Vertical datumsGeoidList of supported map projectionsAitoffAlaska GridAlaska Series EAlbers Equal Area ConicAzimuthal EquidistantBehrmann Equal Area CylindricalBerghaus StarBipolar Oblique Conformal ConicBonneCassini-SoldnerChamberlin TrimetricCraster ParabolicCubeCylindrical Equal AreaDouble StereographicEckert IEckert IIEckert IIIEckert IVEckert VEckert VIEquidistant ConicEquidistant CylindricalEquirectangularFullerGall's StereographicGauss-KrügerGeocentric Coordinate SystemGeographic Coordinate SystemGnomonicGoodes HomolosineGreat Britain National GridHammer-AitoffHotine Oblique MercatorKrovakLambert Azimuthal Equal AreaLambert Conformal ConicLocal Cartesian ProjectionLoximuthalMcBryde-Thomas Flat-Polar QuarticMercatorMiller CylindricalMollweideNew Zealand National GridOrthographicPerspectivePlate CarréePolar StereographicPolyconicQuartic AuthalicRectified Skewed OrthomorphicRobinsonSimple ConicSinusoidalSpace Oblique MercatorState Plane Coordinate SystemStereographicTimes projectionTransverse MercatorTwo-Point EquidistantUniversal Polar StereographicUniversal Transverse MercatorVan der Grinten IVertical Near-Side PerspectiveWinkel IWinkel IIWinkel Tripel