The methods to obtain the Digital Terrain Model (DTM) from contour map by scan digitizing were studied.
本文还研究了通过扫描数字化等高线图建立数字地形模型的方法。
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The accuracy of flood area is mostly dependent on the contour interval of map, accuracy of digitizingmap, accuracy of DEM, and interval of GRID, detecting resolution of pixels.
The steps for the system establishment include digitizing the forest types map and topographic map and linking the attributes of forest types and spatial information.