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Contact us

Tel. +358 29 503 0000
- Register office:
- Personal mail:

Offices and contact information

Management and contact persons

Data and online services

These pages are the centralised location for details concerning public information material possessed by GTK.

Hakku search service

Hakku search serviceOnline strore

The Hakku search service is the central distribution channel for spatial data products or publications, reports, map drawings and photos produced by GTK.
Online store is now part of Hakku service.
Map services

Map services

Theme-specific map services  provide a regional, cartographic approach to geologcal information and related interpretations.
Library website

Library website

The library website contains a wide selection of geological literature and maps. It also offers GTK's archive services.
Summon service

Summon service

The Summon service is a gateway to even more extensive sets of material.

Spinelli service

The Spinelli service is a virtual museum.

In regard to map products and surveying and observation material, you should check the metadata supplied with the product to verify that the information product is suitable for the intended use. You can also check this by contacting our experts. Also, please note that not all spatial data products have been migrated to the Hakku service.



Information services


Geologic index terms


E-dictionaries, e-reference works

Glossary of Geology (AGI)
Encyclopedia of Geology, Elsevier
Encyclopedia of Quaternary Science, Elsevier

The terms of use for products in online distribution

Basic licence
Open licence