example dataset ili2 refmanual appendix I Bessel Bessel (1841) 6377397.1550 299.1528128 Documentation swisstopo 19031266 WGS72 World Geodetic System 1972 6378135.000 298.2600000 CHDeviationOfTheVertical See software LAG swisstopo CHGeoid See new Swiss Geoid swisstopo SwissOrthometricAlt h Swiss Orthometric Altitude orthometric 373.600 Pierre du Niton SwissEllipsoidalAlt H Swiss Ellipsoidal Altitude ellipsoidal 0.000 Sea level COORD2 X X-axis Y Y-axis Mathematical Cartesian 2D Refsystem CHLV03 Y East-value X North-value Geodetic Cartesian 2D Refsystem COORD3 X X-axis Y Y-axis Z Z-axis Mathematical Cartesian 3D Refsystem CH1903 XC Equator Greenwich YC Equator East ZC North Swiss Geodetic Cartesian 3D Refsystem WGS84 XW Equator Greenwich YW Equator East ZW North World Geodetic System 1984 Switzerland Lat Latitude Long Longitude Coordinates on the Swiss Ellipsoid 1903 measure_based -660.077 -13.551 -369.344 -0:0:2.484 -0:0:1.783 -0:0:2.939 0.99444 measure_based 660.077 13.551 369.344 0:0:2.484 0:0:1.783 0:0:2.939 1.00566 46:57:08.66 7:26:22.50 600000 200000