| 数字化仪制图中的线性变换与精度分析 |
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| 引用本文： | 倪学义.数字化仪制图中的线性变换与精度分析[J].上海海事大学学报,1993(4). |
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| 作者姓名： | 倪学义 |
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| 作者单位： | 上海海运学院航海系 |
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| 摘 要： | 线性变换应用于数字化仪制图,是一种实际需要。它是以假定数字化仪坐标系统和纸海图坐标系统都是二维线性空间为前提,由一组控制点在两种坐标系统中的坐标来确定线性变换关系的。控制网点的数字化仪坐标是采样得到的,采样误差会使线性变换矩阵的元素产生误差,从而在作业中对图上任意一点采样值,经过线性变换所得到的地图坐标也会产生误差。本文论述了线性变换关系的建立、精度分析、控制网点的选择优化等问题。
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| 关 键 词： | 线性变换 均方根误差 控制网点 渐长纬度 误差因子 |
Linear Conversion and Precision Analysis in Digitized Chart-Making |
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| Hi Xueyi.Linear Conversion and Precision Analysis in Digitized Chart-Making[J].Journal of Shanghai Maritime University,1993(4). |
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| Authors: | Hi Xueyi |
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| Abstract: | It is a practical need applying linear conversion in digitized chart-making. Based on the assumption that both the digitizer and the paper chart are two-dimension linear space, the conversion matrix can be determined according to X-Y values in two different cartesian Coordinates.The X-Y data of control net points of the digitizer arc obtained by sampled points.Sampled errors can be propagated to the conversion matrix and the electronic chart.
This paper discusses the building of conversion matrix, precision analysis, optimum seeking of control net points, ete. |
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| Keywords: | linear conversion variance control net points meridiana parts error factor |
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