First, a DEM is created according to the digital contour lines from the basic geographic data.
首先，根据基础地理数据，按其等高线层生成DEM；
This Paper discusses the theories and methods on making high quality DEM bases on terrain feature from digital contour line.
本文系统地阐述了基于等高线数据建立高质量DEM的理论和方法。
In this paper the author discusses the theories and methods on making high quality DEM and TIN based on terrain feature from digital contour line.
本文全面系统地论述了基于等高线、地性特征建立TIN和DEM的理论和方法。
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。
Fast measuring of the cab contour is a key link in design of cab. It can turn a solid model into a digital one.
货车驾驶室外形的快速测量是驾驶室设计过程中的重要环节，可以将实体模型转化为数字模型。
Torque setting precision, torsion of high precision, especially suitable for mobile phones, digital cameras contour precision screw assembly work of the product.
扭距设置精准，扭力精度高，特别适用于手机、数码相机等高精密产品的螺丝装配工作。
Based on theories of Computer Graphics, Digital Image Processing, Pattern Recognition and combined characteristic of geological contour-map, we present one kind of intelligent tracking algorithm.
依据计算机图形学、数字图像处理和模式识别理论，并结合地质等值线图的特点，给出了一种图像智能跟踪算法。
Then, by applying this algorithm to the picture after pretreatment, we realize its edge-detection and get vector graphical data. As a result, we solve digital problem of geological contour-map.
然后，对预处理后的图像运用此算法实现了地质等值线图的边缘探测，并得到矢量图形数据，从而解决了地质等值线图件数字化问题。
Then, by applying this algorithm to the picture after pretreatment, we realize its edge-detection and get vector graphical data. As a result, we solve digital problem of geological contour-map.
然后，对预处理后的图像运用此算法实现了地质等值线图的边缘探测，并得到矢量图形数据，从而解决了地质等值线图件数字化问题。
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