摘要
以成都市30 m×30 m分辨率的ASTERGDEMV2版DEM为数据源,基于ARCGIS10.2构建邻域分析法的地形起伏度批量提取模型,提取不同大小矩形邻域窗口的地形起伏度,运用均值变点分析法确定最佳计算单元,在此基础上,将最佳计算单元的地形起伏度与海拔分级图进行空间联合,得到成都市的基本地貌形态类型图。结果表明:成都市地形起伏度提取的最佳计算单元为14×14网格大小(176 400 m2),中起伏度及以下地形占98.54%。全市基本地貌形态类型有20种,其中主要类型5种,面积占96.52%。从空间分布格局来看,西北部的龙门山脉地形起伏变化多样,集中分布了13种类型;低海拔丘陵类型主要集中在龙泉山脉及龙门山脉与成都平原接合部区域,在中部及东部呈零星分布。低海拔平原和低海拔台地两种主要类型主要分布在龙泉山脉与龙门山脉之间及龙泉山脉的西南部。
Based on ASTERGDEMV2 version of the 30 m × 30 m resolution DEM data of Chengdu,the model was established for the terrain undulating volume extraction by neighborhood analysis in ARCGIS10. 2 The terrain undulating degrees of the rectangle neighborhood windows of different sizes were extracted in the city,and the best calculation unit was determined by means of mean variable point analysis. On this basis,the map of terrain undulation was gotlen by spatially combining the best calculation unit with the elevation classification map directly extracted by arcgis10. 2 in order to get the basic landform map of Chengdu. The results showed： that the optimum calculation unit of terrain undulation in Chengdu was 14 × 14 mesh size（176 400 m2）. The terrain was mainly undulating and below,with an area of98. 54%. There were 20 types of basic geomorphologic forms in the city,of which 5 were the main types,with an area of 96. 52%. Aceorotny to the spatial distribution pattern,in northwest of Chengdu. The Longmen mountains displayed variety of terrain fluctuations,and there were 13 types of undulating and varied terrains. The low-altitude hilly types were mainly concentrated in the Longquan mountains and the joint region between the Longmen mountains and Chengdu Plain,with a sporadic distribution in the mid-dle and east of Chengdu. The two main types of low-altitude plain and low-altitude platform were mainly distributed between the Longquan mountains and in the southwestern part of the Longquan mountains.
作者
任德智
肖前刚
王勇军
廖兴勇
赵波
王帆
REN De-zhi;XIAO Qian-gang;WANG Yong-jun;LIAO Xing-yong;ZHAO Bo;WANG Fan(Chengdu Academy of Agrivculture and Forestry Sciences,Chengdu 611130,China;Chengdu Xinglii Forestry Science and Technology Development Co. ’ Ltd, Chengdu 611130 , China)
出处
《四川林业科技》
2018年第2期79-84,共6页
Journal of Sichuan Forestry Science and Technology
基金
成都市科技计划项目:成都市森林碳储量及碳汇增长潜力研究(2017-Y2500W-17)
作者简介
任德智（1977-）,男,四川绵阳人,副教授,硕士,主要从事GIS和森林经理学研究.E-mail：rdz177@sohu.com
