摘要
折线是 Ｇ Ｉ Ｓ中表达线形空间实体的基本制图要素。本文针对由随机折线点构成的折线要素建立了一种可视化误差模型。首先引入了随机折线要素误差带的基本概念，并导出了误差带的边界线数学方程；然后针对开折线和闭折线两种情况绘出了误差带的可视化图形，并分析了误差带形状特征，从而将单一随机折线元的误差带理论进一步扩展到一整条随机折线的一般情况。
The polyline is one basic cartography factor to express the lineal spatial entity in vector GIS. This paper establishes the visualization model of location error for the random polyline which is composed by a sequence random vertexes. Firstly this paper introduces the notion of random polyline error band, derives the mathematical equation of the error band boundary; then gives the visual images according to the closed and unclosed random polyline cases; and analyses the features shape of the error band boundary curve. Thereby, the paper extends the single line error band to the general case of the random polyline.
出处
《测绘学报》
EI
CSCD
北大核心
1999年第3期239-243,共5页
Acta Geodaetica et Cartographica Sinica
基金
国家自然科学基金
