怀化城市形态的演变特征及形成机制

根据城市规划土地利用现状图、怀化市1〖DK1〗∶10 000地形图、遥感影像图、社会经济统计数据以及其他相关资料，借助ArcGIS 92平台和统计分析软件(SPSS 115)，采用空间形态分析、地统计分析、等扇分析、景观测度及分形理论等研究方法，对我国中部铁路枢纽城市怀化的城市形态演变特征及形成机制展开研究。结果表明：城市形态的紧凑度、分维数偏低，形状指数偏大,城市以正东、西南、正北方位的扩展为主，演化轨迹为“据点型”-“散点组团型”-“团城型”-“枝状放射型”-“‘T’字型”；城市形态演变是经济发展、交通设施发展、自然地理条件限制等多重驱动力共同作用的结果.

EVOLUTION CHARACTERS AND FORMATION MECHANISM OF HUAIHUA URBAN MORPHOLOGY

This paper analyzed the evolution characteristics and the fomation machanism of the railway station city——Huaihua not only with the help of urban land use planning map,1〖DK1〗∶10 000 topographic maps,remote sensing imagery,socio economic statistical data and other relevant information,but also with ArcGIS 92 software platform and statistical analysis software (SPSS 115) and some different research methods,such as statistical analysis,spatial patterns analysis,fans analysis,fractal theory.The result shows that city morphology compactness and fractal dimension are low,shape index is excessive.Huaihua City’s expansion direction stretches mainly to the east,southwest and north;its evolution path is the “base”—“scatter groups”—“Mission City”—“branched radiation”—“‘T’ fonts”.The evolution of urban patterns is the joint effect of multiple driving forces,including economic development,transport infrastructure development,natural and geographical conditions.