DEMtietojen

DEMtietojen is a term originating from Finnish, where "DEM" likely refers to a digital elevation model and "tietojen" translates to "information" or "data". Therefore, DEMtietojen essentially means digital elevation model data. This type of data represents the bare earth surface topography without the influence of vegetation, buildings, or other surface features. It is typically derived from various sources such as aerial photographs, satellite imagery, or LiDAR (Light Detection and Ranging) surveys.

The primary purpose of DEMtietojen is to provide a quantitative representation of the Earth's surface elevation. This data is crucial for a wide range of applications in fields like geography, environmental science, urban planning, and engineering. For instance, DEM data is used in hydrological modeling to predict water flow and flood risk, in geological studies to understand landforms and their formation, and in civil engineering for designing infrastructure projects like roads and bridges. It is also fundamental for creating shaded relief maps and for performing 3D visualizations of terrain. The resolution and accuracy of DEMtietojen can vary significantly depending on the acquisition method and processing techniques employed.