基于林区GPS控制网的手持式GPS空间定位试验  

An Experiment of Spatial Positioning with Portable GPS Based on Forest District GPS Control Network

作　　者：李春干[1] 代华兵[2] 

机构地区：[1]广西林业勘测设计院广西,南宁530011 [2]广西大学林学院,广西南宁530004

出　　处：《南京林业大学学报（自然科学版）》2006年第5期127-131,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家自然科学基金资助项目(30371159);广西壮族自治区"新世纪十百千人才工程"专项资金资助项目(2002218);广西壮族自治区林业局科学基金资助项目(200246)

摘　　要：在林区建立GPS控制网,求解高精度的坐标转换参数,然后采用手持式GPS进行样地中心定位和小班边界定位的方法进行了试验。结果表明:在实际应用中宜选择5个已知差分基准站来求解坐标转换参数;手持式GPS的样地中心定位最大综合误差为3.86 m,小班边界平均位移和中心位置绝对位移分别为3.23 m和3.72 m,小班面积测量精度达98%以上,完全能满足林业生产中实际应用的需要,且操作简单、实用性强,可极大地提高森林资源调查和监测的工作效率。The main applications of GPS in forest inventory and surveying are the positioning of sample plot centre and the boundary positioning of sub-compartment. This paper studied the founding of the forest district GPS control network, calculated the conversion parameters of coordinate, then utilized the portable GPS to position the sampling plot centre and subcompartment boundary in forest land. The results indicated that five plots were enough for calculating the conversion parameters of coordinate; and the largest RMS error of single plot positioned by portable GPS was 3.86 m. The average boundary displacement and absolute displacement of sub-compartment＇s center were 3.23 m, 3.72 m respectively and the area accuracies of three sub-compartments were higher than 98 %. Such a method can meet the requirement of the GPS application in forest inventory and surveying. Moreover, this method is easy and practical and can improve the efficiency of forest inventory and surveying.

关 键 词：林区GPS控制网 手持式GPS 样地中心定位 小班边界定位 

分 类 号：S757[农业科学—森林经理学]