中文摘要：

选取中国22个主要铁路枢纽城市作为研究样本，利用1990年、2000年的城区土地利用现状图和2012年遥感影像图，在ArcGIS9．3软件中提取城区外围轮廓，运用紧凑度、分维数和形状指数等指标测度铁路枢纽城市空间形态，然后利用SPSS软件对上述指标进行统计分析，探讨铁路枢纽城市空间形态的演变特征。结果表明：总体来看，铁路枢纽城市空间形态逐渐趋向紧凑，形状逐渐趋向方形和圆形；从各要素来看，铁路枢纽城市空间的紧凑度、分维值的差异越来越小；相对于矿业城市，铁路枢纽城市空间整体趋于分散，紧凑度相对较高；从规模来看，规模小的铁路枢纽城市紧凑度较高，形状趋于简单，规模大的紧凑度较低，形状趋于复杂。

英文摘要：

This paper selects China 22 major railway hub cities as research sample, extracted urban fringe contour with 1990, 2000 current land use map and 2012 remote sensing image in ArcGIS9.3 software, and then, measured such as railway hub city space form by the compact degree, shape index and fractal dimension index, last, discussed the evolution characteristics of railway hub city with statistical analysis by SPSS software. The results showed that： ① Overall, urban spatial morphology of the railway hub gradually moving towards compact, gradually moving to square and round shapes; ②From the point of view of the elements, the difference of compactness, fractal dimension and shape of the index is more and more small between rail hub city;③relative to mining cities, the whole urban space of railway hub tend to disperse and a relatively high degree of compactness; ④terms of size, small-scale railway hub city was of high degree of compactness and tends to be simple shape, but large-scale＇s was low and become more complex shapes. The more clearly reveals the space form evolution characteristics of the railway hub city, has certain significance to the research process and mechanism of deepening the urbanization.