| GIS中平面一般曲线误差模型包络线 |
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| 引用本文： | 汤仲安,王新洲,陈志辉.GIS中平面一般曲线误差模型包络线[J].测绘学报,2004,33(2):151-155. |
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| 作者姓名： | 汤仲安 王新洲 陈志辉 |
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| 作者单位： | 武汉大学,测绘学院,湖北,武汉,430079;武汉大学,测绘学院,湖北,武汉,430079;武汉大学,测绘学院,湖北,武汉,430079 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 误差模型包络线是GIS位置不确定性研究的重要内容,是GIS可视化研究的关键指标.为了充分利用计算机技术求解符合GIS精度要求的包络线,以不规则曲线为例,叙述基于数值算法的一般曲线误差模型包络线的确定原理和计算方法,并通过实例进行可视化分析,验证原理的正确性和可操作性.
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| 关 键 词： | 数值算法 曲线拟合 包络线 可视化 |
| 文章编号： | 1001-1595(2004)02-0151-05 |
Envelop of Error Model of 2D Spatial Curve in GIS |
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| TANG Zhong-an,WANG Xin-zhou,CHEN Zhi-hui.Envelop of Error Model of 2D Spatial Curve in GIS[J].Acta Geodaetica et Cartographica Sinica,2004,33(2):151-155. |
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| Authors: | TANG Zhong-an WANG Xin-zhou CHEN Zhi-hui |
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| Abstract: | How to ascertain boundary envelop of error model is not only of the importance for GIS uncertainty theory, but also the critical index for GIS uncertainty visualization research. In order to make use of the computer technology sufficiently to obtain boundary envelop of error model which accords with the GIS precision demand, we went into particulars the ascertaining theory and calculation method for boundary envelop to positional uncertainty error band of 2D spatial curves based on the numerical value algorithm, and analysed the results by case study and visualization. |
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| Keywords: | numerical value algorithm curve fitting envelop visualization |
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