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Height systems

Heights above sea level are referred to a height system.

A height system is made up of a network of well-founded and accurately measured points – benchmarks – and has a well-defined vertical datum (zero point).

Through the years, Sweden has had three national height systems: RH 00, RH 70 and RH 2000. The phenomenon of postglacial land uplift, to which the Nordic countries, amongst others, are exposed, is a factor that influences height systems.

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