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以土壤类型图、地形图、全氮图等资料为数据源,利用ArcGIS9.2建立广东省赤红壤数字高程模型(DEM),提取海拔高度、坡度、坡向和地势起伏度,探索大尺度下全氮分布与地形特征的关系.研究表明:全氮含量与海拔高度、坡度和地势起伏度呈负相关关系,并随着海拔高度、坡度和地势起伏度的上升分布面积迅速下降,在坡向上,则主要分布于平坦区域和东南坡.
With the data of soil type map, topographic map and total nitrogen map as the data source, the digital elevation model (DEM) of latosolic red soil in Guangdong Province was established by using ArcGIS 9.2, and the altitude, slope, aspect and topographic relief were extracted, The relationship between total nitrogen and topographic features was studied.The results showed that the total nitrogen content was negatively correlated with the altitude, slope and topography, and the distribution area decreased rapidly with the rise of altitude, slope and topography, , It is mainly distributed in the flat area and the southeast slope.