In the Geoarchive, information of a geo-character has been collected. The material is available in both analogue and digital format, but much of the material has been transferred to digital format. In the Geoarchive you will find: •Geotechnical probes (approx. 600 000). •Geotechnical probes (planned); •Geotechnical investigations (approx. 3000). •Geological maps (scale 1:2000 and 1:10 000). •House foundation maps (scale 1:2000). •Basewater levels (about 600 active groundwater pipes and about 1000 completed). •Setting balances from buildings (about 250 buildings, of which about 100 in the Old Town). •Setting-off of soil (about 60 ground-setting mirrors).