结合分段三次多项式与Akima法的等高线平滑方法  

Contour line smooth combined with segmental cubic polynomials with Akima

作　　者：郑凤娇[1] 

机构地区：[1]武汉市勘测设计研究院,湖北武汉430022

出　　处：《测绘工程》2012年第3期9-12,共4页Engineering of Surveying and Mapping

基　　金：精密工程与工业测量国家测绘局重点实验室开放基金资助项目(PF2009-22)

摘　　要：实际地形一般是连续变化的。根据数字高程模型(Digital Elevation Model,DEM)自动绘制的等高线由折线段相连而成,需要进一步平滑,以便更准确地描绘出实际地形的分布。结合分段三次多项式与Akima法来对等高线进行平滑处理。实验证明该方法效率高,结果满意,达到较好的平滑效果。The actual terrain generally changes continuously. Contour line automatically drawn through Digital Elevation Model（DEM） is formed by connected line segments, and it needs further smooth in order to describe actual terrain distribution more accurately. The paper combines segmental cubic polynomials with Akima method to smooth contour line. The experiment proves that the method has high efficiency and a satisfactory result, and achieves good smoothing effect.

关 键 词：等高线平滑 分段三次多项式 Akima 

分 类 号：P208[天文地球—地图制图学与地理信息工程]