Contact us

Tel. +358 29 503 0000
E-mail: 
- Register office: gtk_gtk.fi
- Personal mail: forename.surname_gtk.fi

Offices and contact information

Ground surveying (PTR)Pohjatutkimukset (ptr)

GTK and the Finnish Transport Agency have developed a service for displaying the ground survey data. The service that was opened in autumn 2011 allows users to view and download survey data free of charge. The data displayed in the service is collected from various producers of ground survey data.

The data can be downloaded in the Infra-2.1 format, either with the original coordinates or the national ETRS-TM35FIN coordinates. The Coordinate transformations have been done according to the municipality-specific MML transformation formulas of the Land Survey of Finland.

The ground survey data of the Finnish Transportation Agency contain both the basic data of the points and the actual survey data (observation line data). For the ground survey data of some owners, only the metadata is displayed. The metadata includes the basic data included in the Infra ground survey format without the survey data.

Submitting ground survey data

Users can send the ground survey transfer files (in Infra and Tekla formats) to be stored in the system by e-mail.

Contact: pohjatutkimus(at)gtk.fi