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Position: Home > Articles > 基于3S技术的林地面积抽样方法比较-以龙泉市为例 Forest Resources Management 2018 (3)

基于3S技术的林地面积抽样方法比较-以龙泉市为例

作  者：
华一枝;龚鑫烨;黄星旻;温小荣;林国忠
关键词：
林地面积;抽样调查技术;空间抽样;空间自相关性;龙泉市
摘  要：
以浙江省龙泉市林地面积为例,确定0.5km*0.5km,1km*1km,1.5km*1.5km,2km*2km等4种抽样框大小,在可靠性95%和抽样精度85%的水平上进行简单随机抽样、分层抽样和空间分层抽样.结果表明:1km*1km抽样框的总体变异性指数最小,抽样所需样本数量最少;以1km*1km抽样框进行随机抽样、分层抽样、空间分层抽样,空间分层抽样的抽样精度最高.最终确定1km*1km的空间分层抽样为最优方案,这是一种抽样成本低、抽样精度高、相对误差小的抽样方法,可为县级森林资源调查提供方法参考.
作  者：
HUA Yizhi;GONG Xinye;HUANG Xingmin;WEN Xiaorong;LIN Guozhong;Co-Innovation for Sustainable Forestry in Southern China,Nanjing Forestry University;Forestry College of Nanjing Forestry University;
单  位：
HUA Yizhi%GONG Xinye%HUANG Xingmin%WEN Xiaorong%LIN Guozhong%Co-Innovation for Sustainable Forestry in Southern China,Nanjing Forestry University%Forestry College of Nanjing Forestry University
关键词：
forest area;;sampling technique;;spatial sampling;;Spatial autocorrelation;;Longquan City
摘  要：
This article takes forest land area in Longquan City of Zhejiang Province as an example, and sets 0. 5 km ×0. 5 km,1 km x 1 km, 1. 5 km x 1. 5 km and 2 km ×2 km as four kinds of sample frame. With the reliability of 95% and the sampling precision of 85%, simple random sampling, stratified sampling and spatial stratified sampling are conducted. The overall variability index of 1 km x 1 km sampling frame was the smallest, and the sampling plots required was the least. The plots with 1 km x 1 km sampling frame were randomly sampled, stratified sampled, spatial sampling stratified, and spatial sampling stratified has the highest sampling precision. Finally,the spatial resolution of 1 km x 1 km is determined as the optimal solution. The results show that the spatial sampling is a method with low sampling cost,high precision and small relative error in the sampling of forest area. The results provide references for the future forest resources survey at the county level.

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