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首页> 外文期刊>Computers & geosciences >Measuring positional error of circular curve features in Geographic information systems (GIS)
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Measuring positional error of circular curve features in Geographic information systems (GIS)

机译：在地理信息系统（GIS）中测量圆曲线特征的位置误差

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摘要

This paper addresses the task of modeling positional uncertainty of circular features. The specific interest provided by this study is the consideration of the actual curve function in the measurement of circular curve error. This approach differs from the existing methods based on line segment approximation. A least-squares adjustment method, composed of a series of discrete points and the covariance of these parameters, is adopted to estimate the parameters of a circular curve. Two geometric measures are developed, based on the error ellipses of the points on the circular curve: the standard deviation-based measure and the maximum distance-based measure. A comparison of the two measures for circular curves was conducted by means of a simulation experiment. The implementation of the two geometric measures is further illustrated by two case studies; one describes the positional error of digital shorelines and the other digitizes circular road curves.
机译：本文致力于为圆形特征的位置不确定性建模的任务。这项研究提供的特殊兴趣是在测量圆曲线误差时考虑实际曲线函数。这种方法不同于基于线段逼近的现有方法。采用由一系列离散点和这些参数的协方差组成的最小二乘平差方法来估计圆曲线的参数。基于圆曲线上各点的误差椭圆，开发了两种几何度量：基于标准偏差的度量和基于最大距离的度量。通过模拟实验比较了两种测量曲线的方法。通过两个案例研究进一步说明了这两种几何度量的实现。一种描述数字海岸线的位置误差，另一种数字化圆形道路曲线。

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  • 来源
    《Computers & geosciences》 |2010年第7期|P.861-870|共10页
  • 作者

    Xiaohua Tong; rnWenzhong Shi;

  • 作者单位

    Department of Surveying and Ceo-informatics, Tongji University, 1239 Siping Road, Shanghai 200092, PR China;

    rnAdvanced Research Center for Spatial Information Technology, Department of Land Surveying and Geo-informatics, The Hong Kong Polytechnic University, Hong Kong;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    circular curve; geometric measure; least squares;

    机译：圆曲线几何尺寸最小二乘;

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