Solutions to heart-shaped loop including the solution to minimal circumscribed heart-shaped loop, maximal inscribed heart-shaped loop and minimal zone heart-shaped loop and the error evaluations of non-perimeters were suggested in detail.
详细介绍了心形线边界的求法 (包括最小外接心形线求法、最大内切心形线求法和最小区域心形线求法等 3种方法 )以及进行不圆度误差评定的方法。
This paper analyses yaole pasture village in Naiman Banner in Nei Monggol, and puts forward the succession patterns and reasons of the local relationship between human and nature in the interlacing agropastoral region of semiarid zone.
通过对内蒙古奈曼旗尧勒甸子村的微观研究，得出北方半干旱农牧交错带小区域人地关系演变的模式及原因，并在近年来这一地区实施“多元系统”整治的基础上，综合运用环境科学与经济学的理论，提出这一地带建设小区域高效经济生态系统的宏观发展模
Local topographic relief,which is defined as the difference between local maximum elevation and local base level,is one of the key methods in topographic analysis.
基于数字高程模型(DEM)空间分析方法,利用SRTM采集的DEM数据,提出两种获取区域地形起伏的关键技术,即高程条带法(Swath Profile)和高程阈值法(Threshold Value),并通过扩展区域地形起伏获取的技术方法,初步实现了黄土高原典型地区侵蚀量的定量化分析。