Geological Data

Distribution routines of geological data are developed jointly by the local and EU (INSPIRE) spatial information community. GTK hosts extensive numerical files and databases, typically utilized by government agencies and exploration companies. Part of the material is chargeable by law. For the moment a substantial part of the free material is available only on request. However, Internet distribution is being developed.

See also: Geophysical Data Geochemistry Bedrock and Minerals Surficial deposits Latest Data Products

Geophysical Data

Ground geophysics

While conducting geophysical field surveys for exploration, geological mapping, environmental studies, urban and physical planning, and basic research, GTK utilizes a wide range of instrumentation that includes ground penetrating radars (GPR), gravimeters, seismographs, refraction seismic equipment with hydrophones for land and water areas, Slingram, VLF, spectral IP, and EM wide-band deep sounding equipment.

Regional gravity

Geophysical laboratory data

The Geophysical laboratory measures physical parameters of rock and soil samples. Results are utilized in geological, exploration, paleomagnetic, mineral magnetic, environmental and building stone applications.

Airborne geophysics

GTK was among the first in the world to start systematic airborne geophysical mapping in 1951. Since 1972 GTK has acquired and processed more than 1.7 million line kilometers (more than 15 000 flight hours) of airborne geophysical data. Results of airborne magnetic, electromagnetic and radiometric measurements covering the whole country (by 2008) using 200 m line spacing and 30 m flight altitude are availabe at a fee in Geosoft- and ERMapper formats.

Enquiries about GIS-data: geodata gtk.fi


Exploration Finland provides exploration related data and information, including dedicated web pages on gold, zinc, nickel and PGE. A map user interface for multiple attribute and survey data is also available.