This paper discusses the methods of automatic extraction of digital elevation model (DEM) from remote sensing image. A system of scheme is established to extract DEM from SPOT image.
本文研究了利用航天遥感影像自动提取数字高程模型（DEM）的方法技术，建立了一整套利用SPOT影像提取DEM的方案。
The extraction of contour lines from Grid DEM is a primary function in computer-aided cartography and GIS.
从规则高程格网中自动提取等高线是地理信息系统以及计算机制图的基本功能。
It is a new approach to explore relief Automated Generalization, based on DEM skeleton characteristic point and line to automate generalize relief, through the extraction DEM terrain skeleton c.
基于DEM骨架特征点线进行地貌的自动综合，是通过提取DEM地形骨架特征数据来实现地貌自动综合，是对地貌自动综合新方法的探索。
The principles, methods and process of automated extraction of natural stream networks of watershed based on raster DEM are described.
论述了如何基于栅格dem自动提取流域自然水系的原理、方法和流程。
This paper presents an algorithm for watershed features extraction based on DEM.
本文提出并实现了一种基于规则格网dem的地形特征线提取算法。
Based on TINs DEM, a new single-flow direction algorithm for topographic patterns extraction is proposed.
基于不规则三角网DEM，提出一种新的单流向地形特征自动提取算法。
The average in short, the different spatial resolution to DEM watershed feature extraction various aspects of the parameters have certain effect.
总而言之，空间分辨率的不同对DEM流域特征提取的各方面的参数均有一定的影响。
An analysis was performed of the method and characteristics of SPOT stereopair for DEM generation and some other methods for underlying surface information extraction currently used in engineering.
分析了利用SPOT卫星影像提取下垫面信息的现状，包括工程实践中通过SPOT立体像对恢复DEM的方法及其特点以及其他下垫面信息的提取方法及其特点；
The fast extraction of the watersheds based on DEM saves manpower and material resources greatly, which is feasible according to efficiency and precision.
基于DEM的流域的快速提取，大大节省了的人力、物力，从提取的效率和精度来看都是切实可行的。
Valley extraction based on a regular DEM grid is an important method for terrain analyzing.
基于规则数字高程模型格网的峡谷检测是地形特征分析的重要手段。
Valley extraction based on a regular DEM grid is an important method for terrain analyzing.
基于规则数字高程模型格网的峡谷检测是地形特征分析的重要手段。
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