Peruskarttoihin

Peruskarttoihin is the Finnish term referring to the basic base maps that form the foundational layer in Finland’s national geospatial data infrastructure. They are produced and maintained by the National Land Survey of Finland (Maanmittauslaitos) and serve as a common geographic reference for public administration, planning, and various services.

Contents and scales of peruskarttoihin typically include topographic features such as terrain, water bodies, roads, built-up areas, land use, and administrative boundaries. In digital form these base maps are provided at multiple scales, commonly around 1:10,000 to 1:20,000, and are designed to align with other national map layers to enable consistent spatial analysis and integration.

Usage and distribution: Peruskarttoihin act as the core layer for cadastral information, zoning, infrastructure planning, environmental management, and public services. They are widely used by municipalities, government agencies, businesses, and researchers. The data are distributed through official map services and data portals, with licensing that generally allows public use and requires attribution.

Digital transition and integration: Since the late 20th century, peruskarttoihin have transitioned from analog maps to digital base maps used in geographic information systems (GIS). They are integrated with other national map layers to support a range of spatial analyses and applications across sectors.

Access and formats: The base maps are available via national online map services and data portals. They are commonly accessible in standard GIS formats and through web services such as downloadable datasets, allowing use in various software and platforms under applicable licenses.