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Reference Networks

A reference network is a grid of measured points that serves as the basis for surveying and mapping a region.

Denmark
In Denmark, several reference networks have been developed with various techniques and technologies.

REFDK and the 10 km Net are the newest of these, having been established with GPS and defined with coordinates in ETRS89. They include 89 and approximately 620 reference points respectively.

The most comprehensive of Denmark's reference networks consists of 67,000 levelling points located across the country. This network brings DVR90 heights to all parts of the country.

For more information about the GPS based reference networks used in Denmark, please click on the links below.

Greenland
In Greenland, the National Survey and Cadastre has established a network of GPS-referenced points as the foundation for technical surveying and mapping. This network, known as REFGR, is comprised of 258 points along Greenland's coast and defines the GR96 reference system. Click here for a more detailed description of REFGR.