摘要
在空间插值方法中,权函数是影响空间插值精度的重要因素之一,通常需要选择具有性质较好的权函数进行空间插值。推导一种紧支撑权函数的性质,以铁矿品位为数据源,采用紧支撑权函数进行空间插值,最终验证该紧支撑权函数的优良性质:具有较高的插值精度。推导的紧支撑权函数性质可为后期构建新的紧支撑权函数作为一种借鉴。
The weight function is one of the important factors that influence the spatial interpolation precision in many spatial interpolation methods.Weight function with better mathematical property is selected with spatial interpolation methods.Based on it,the mathematical property of compactly supported weight function is deduced in this paper.Iron ore grade sampling data as data source is used in compactly supported weight function interpolation experiment.By experimental validation,compactly supported weight function with fine properties has better precision and versatility.The mathematical property derivation of compactly supported weight function can be a guide for building a new compactly supported weight function.
出处
《测绘工程》
CSCD
2016年第11期7-11,共5页
Engineering of Surveying and Mapping
基金
国家自然科学基金资助项目(41271383)
云南师范大学博士基金资助项目(01300205020503128)
关键词
紧支撑权函数
空间插值
反距离权重
铁矿品位
compactly supported weight function
spatial interpolation
inverse distance weighted
iron ore grade
