Maastomallien
Maastomallien is a Finnish term referring to terrain models, digital representations of the Earth's surface used in geographic information systems, planning and simulation. They capture elevation data and terrain features, and in some variants also surface objects such as vegetation and buildings.
Types and forms: A digital terrain model (DTM) represents the bare ground, typically removing vegetation and
Data sources: Maastomallien are produced from airborne LiDAR, photogrammetry from aerial or drone imagery, satellite radar,
Applications: They support hydrological modeling, flood risk assessment, slope and aspect analysis, urban planning, infrastructure design,
Formats and standards: Common storage formats include raster grids such as GeoTIFF or ASCII GRID and vector
Limitations: Accuracy depends on data quality and processing. Vertical accuracy is critical, and updates may lag
History and context: Terrain modeling developed through the late 20th century and expanded with LiDAR and high-resolution