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以河南省重点林业县西峡为研究对象,以2003年森林资源连续清查空间数据库为主要信息源,在地理信息系统软件ArcGIS 9.3、数据挖掘软件Clemintine 12.0支持下,通过空间热点探测、趋势面分析、地理加权回归、C5.0决策分析来进行西峡县森林生物量空间知识挖掘。研究表明:生物量的空间分布与海拔梯度有关,呈现一种从北向南阶梯状逐渐降低的带状分布格局;生物量与平均树高、坡度正相关,与土壤厚度、灯光亮度负相关;C5.0决策分析4个主要输入变量的重要性依次为平均树高(0.30)>灯光亮度(0.24)>坡度(0.23)>土壤厚度(0.22)。
Taking Xixia, a key forestry county in Henan Province as the research object and the spatial database of continuous forest inventory in 2003 as the main source of information, with the help of Geographic Information System software ArcGIS 9.3 and data mining software Clemintine 12.0, the spatial hotspot detection and trend surface analysis , Geographic weighting regression and C5.0 decision analysis to excavate spatial knowledge of forest biomass in Xixia County. The results showed that: the spatial distribution of biomass was related to the altitude gradient, showing a strip-shaped distribution pattern decreasing gradually from north to south; the biomass was positively correlated with average tree height and slope, negatively correlated with soil thickness and light intensity; .0 Decision Analysis The importance of the four major input variables was, in turn, the mean tree height (0.30)> light intensity (0.24)> slope (0.23)> soil thickness (0.22).