karttatasoa
Karttatasoa is the Finnish term used in geographic information systems to refer to a distinct set of geographic features and their attributes that can be displayed independently on a map. A karttataso may be vector or raster, and may include points, lines, and polygons, along with attribute data and styling information (symbology). In practice, layers are organized into base layers (taustakartta) that provide contextual information, and overlay layers that add thematic data such as roads, land use, or administrative boundaries. Layers can be combined, reordered, turned on or off, and analyzed separately or jointly.
Common data formats and standards govern karttatasot: vector formats such as Shapefile, GeoJSON, or GeoPackage; raster
Challenges include data quality, interoperability between systems, licensing, and keeping data up to date. Karttatasoa is