10 meter digital elevation model (DEM) clipped to the Andrews Experimental Forest, 1998

A Digital Elevation Model (DEM) is a digital data file containing an array of elevation information over a portion of the earth's surface. This array is developed using information extracted from digitized elevation contours from Primary Base Series (PBS) maps. FSTopo or PBS are 1:24,000 scale topographic maps. This dataset is a digital elevation model grid at a resolution of 10 meters by 10 meters. The data was originated from 1:24,000 scale topographic maps (primarily contours). The base data is in the form of an esri lattice file. Derived datasets include generated contours at 10, 25, and 50 meter intervals, degree slope, aspects, and a hillshade for topographic visualization.

数字高程模型（Digital Elevation Model, DEM）是一种存储地球表面某一区域高程信息阵列的数字数据文件。该高程信息阵列通过从基础主系列（Primary Base Series, PBS）地图的数字化高程等高线中提取的信息构建而成。FSTopo与PBS均为1:24000比例尺的地形图图件。本数据集为分辨率10米×10米的数字高程模型格网数据，其原始数据源自1:24000比例尺的地形图图件（核心为等高线数据）。基础数据采用Esri格网文件格式存储。衍生数据集包含间隔为10米、25米及50米的生成等高线、度数制坡度、坡向，以及用于地形可视化的地形晕渲图。