swissSURFACE3D Raster monodirectional hillshade

The hillshade is derived from the digital elevation model swissSURFACE3D Raster. It illustrates the surface relief of Switzerland and the Principality of Liechtenstein. A hillshade is derived from the elevation model by calculating the exposure of the surface to sunlight at a certain or several angles. The monodirectional swissSURFACE3D Raster hillshade is generated using a northwestern sun position as light source.

本山体阴影图（hillshade）源自swissSURFACE3D栅格数字高程模型（Digital Elevation Model, DEM）数据集，用于呈现瑞士与列支敦士登公国的地表起伏形态。山体阴影图的生成原理为：通过计算地表在单个或多个光照角度下的太阳直射暴露量，从高程模型中衍生得到。本次生成的单方向swissSURFACE3D栅格山体阴影图，以西北方位的太阳作为光源。