湖南省森林资源连续清查遥感抽样技术的对比分析  

Comparative study of remote sensing sampling technique in national forest inventory of Hunan province

作　　者：孙华[1,2] 林辉[2] 石军南[2] 莫登奎[2] 朱光玉[2] 臧卓[2] 

机构地区：[1]中国林业科学研究院资源信息所,北京100091 [2]中南林业科技大学林业遥感信息工程研究中心,湖南长沙410004

出　　处：《中南林业科技大学学报》2010年第11期26-31,共6页Journal of Central South University of Forestry & Technology

基　　金：国家"十一五"科技支撑课题(2006BAD23B01;2006BAC08B03);湖南省自然科学基金项目(07JJ3060)

摘　　要：以湖南省2004年森林资源连续清查遥感样地为研究对象,在抽样可靠性指标为95%的情况下开展遥感抽样技术研究,采用分层抽样与系统抽样进行比较。抽样点间隔为4 km×8 km,4 km×4 km,4 km×2 km,2 km×4 km,2 km×2 km 5种方式。结果表明:(1)抽样强度相同情况下,分层抽样精度大于系统抽样;(2)抽样点间隔越小系统抽样精度、分层抽样精度越高;(3)抽样点间隔对样本数量少的地类抽样精度影响最大;(4)抽样总体精度以抽样点间隔2 km×2 km分层抽样最大。Taking the remote sensing sampling plots of continuous forest inventroy in Hunan province in 2004 as the study object, The romote sensing technique was studied under the condition of reliability index of 95%,then the stratified sampling was compared with system sampling.In this study,five sampling interval methods were adopted,whose intervals are 4km×8km,4km×4km,4km×2km,2km×4km and 2km×2km.Results show that：（1） in the same sampling intensity,sampling precision of stratified sampling was higher than system sampling;（2） the smaller the sampling interval was,the higher the sampling precision was;（3） for the small sample size,sampling interval was the greatest influence factor;（4） of the sampling methods,the precision of 2 km × 2 km stratified sampling was the highest.

关 键 词：森林经理学 森林资源连续清查 LANDSAT7 系统抽样 分层抽样 湖南省 

分 类 号：S757[农业科学—森林经理学]