Release of the new National Height Network of Switzerland LHN95

摘要

With the introduction of the new geoid model of Switzerland (CHGeo2004), the consistency between the ellipsoidal heights based on GPS observations and the orthometric heights resulting from precise levelling (and gravity) has now been achieved. Furthermore, the gravityfield-related vertical reference frame completes the new national survey in Switzerland, LV95. On March 18,2005, the results of the new National Height Network LHN95 were presented to the geodetic community for the first time. They will now be available to all surveyors interested in applying GNSS-based height determination, even though LHN95 is not officially in use for cadastral surveying. Besides the realization of the geoid model and the vertical reference frame, the poster presentation shows the differences to the old official heights LN02, the differences along the national borders to our neighboring countries, and the relationship to the European vertical system.