RH 00

The Swedish height system 1900, RH 00, is based on the first precise levelling of Sweden which was carried out during the period 1886-1905.

Reference network

On the ground, RH 00 is represented by approximately 2,500 benchmarks from the first precise levelling. To cover the need for the general mapping, the precision line network has over the years been densified in several steps with a large number of points in the so-called line levelling. The line levelling is described in History - height systems (pdf, new window).

Calculation of RH 00

 Map of the elevation from the first precision balance. The mean sea level in Stockholm in the year 1900 was chosen as the zero level, represented by a marked point on Riddarholmen in central Stockholm.

No account was taken to the land uplift when calculating RH 00. Therefore, the heights in RH 00 can not be related to any common time (epoch), but apart from the northernmost part, 1892 can be considered an approximate epoch.

The use of RH 00

In national contexts, RH 00 has lhad its day. At the local and regional level, before the launch of RH 2000, there were many applications where RH 00 was used. Many local height networks were connected to RH 00. As the coverage and quality of the first precise levelling was poor and as later densifications were of even poorer quality, the connection points were often inadequate. This has led to a lot of local RH 00 networks with very poor connection to each other and often poor internal geometry. Among other things, in connection with the introduction of new measurement technology (GNSS), these shortcomings became an increasing problem. Today, most local users have left RH 00 and adopted RH 2000.

System facts

  • Vertical datum point point: Riddarholmen, Stockholm
  • Reference epoch: Approximately 1892
  • Type of heights: Orthometric heights
  • Standard error: 4.4 mm / √km
  • Corrections: No land uplift or earth tide correction

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