Datasets, Maps and GTK’s Online Services

Geological Survey of Finland GTK offers a wide range of materials, maps, images, and research results on its website. Here are the most relevant services for rock enthusiasts. Some useful services from other organizations are also included.

The links on this page direct you to the map services provided by GTK and the National Land Survey of Finland (MML). These maps can be used for guidance in the terrain but they also provide information on the geology of the area. GTK’s map service interfaces contain a wealth of observation and measurement data, as well as interpretations based on the data.

Aerial view of a small town or village in Europe, Finland

Geo.fi – home to all geological data

GTK’s Geo.fi webpage is also useful to rock enthusiasts. This webpage is a central location for up-to-date geological information, maps, spatial data products, documents, and images. All GTK’s data and online services are gathered on this webpage.

Get to know Geo.fi

Different maps

Topographic and background maps and aerial images

In National Land Survey’s MapSite service (Karttapaikka), you can find topographic maps, aerial images, and background maps. The service enables you to view location coordinates of your choice.

Visit Karttapaikka

Map of applications and permits issued under the Mining Act

Finnish Safety and Chemicals Agency (Tukes) maintains the mining register and a map service that displays rights issued under the Finnish Mining Act, including reservations, applications, and permits. By clicking on a location, you can view the holder of the mining permit.

Visit the map (in Finnish)

Spatial datasets and services

The National Land Survey's (MML) Paikkatietoikkuna is a national spatial data portal that presents geospatial datasets and services, as well as possibilities for their utilisation. The geology layer includes several different maps.

Visit Paikkatietoikkuna

What areas have layman’s samples been submitted from?

Tens of thousands of layman’s samples have been submitted to GTK over the years. Some of the samples have been analysed more closely in the laboratory. A portion of the analysed and field-verified layman’s samples have been added to GTK’s Mineral Deposits and Exploration (MDaE) map application.

Neljä miestä tarkkailevat maassa olevaa mittalaitetta mäntymetsässä.

Analysed layman’s samples on the map

The MDaE map application includes a dedicated map layer for field-verified, analysed layman’s samples.

Visit the MDaE application

Henkilö pitelee kiveä toisessa kädessä ja puhelinta toisessa kädessä, näytöllä Omakivi-sovellus.

Non-analysed layman’s samples on the map

Both analysed and non-analysed samples can be found in the Layman’s Sample Map Service (Kansannäyte) in Finnish.

Visit the Layman’s Sample Map Service (in Finnish)

Results of layman’s samples analysed between 2014 and 2023 are currently available in Excel format (in Finnish). You can download the Excel file here.

Instructions for viewing field-verified public samples in the MDaE map application

To view field-verified layman’s sample locations on the map, the following layers must be enabled in the Mineral Deposits and Exploration (MDaE) map application.

A picture of the view of the map service, with dot-like objects marked on the map base of Finland. At the left are the indexes that explain the content.

Geological datasets on the map

You can assess different geological datasets in the GTK spatial data product service Hakku. This service also includes layman’s sample data (in Finnish, Kansannäyteaineisto). The layman’s sample dataset contains information collected by GTK and Outokumpu Oy from amateur geologists that have submitted bedrock and boulder samples.

Visit the Hakku service