基于ESA遥感影像的伊朗城镇空间时空演变分析

The spatio-temporal analysis on the evolution of urban space in Iran based on remote sensing images from ESA

伊朗位于"丝绸之路经济带"与"海上丝绸之路"的交汇点,了解伊朗的发展格局有助于帮助"一带一路"倡议更好地执行和实施。而城市又是一国经济发展的载体,因此,研究伊朗城镇空间的时空变化能够从宏观上了解伊朗,进而为今后两国的合作提供参考依据。此研究基于2000—2015年伊朗影像数据,利用数学统计、核密度、标准差椭圆分析方法,对伊朗城镇空间演变进行时空分析。研究结果表明:1)伊朗城市扩张力度逐年增加,经济发展困境并未对城市扩张速度造成较大影响。2)伊朗西部49.35%的国土分布着81.62%的城镇建成区。全国城镇建成区呈现出形似"蟹钳"的集群-不规则轴线型分布,即"一片区、上钳线、中钳线、下钳线"的空间分布格局。3)伊朗城镇空间分布在整体方向即分布重心上向西北方迁移,但具体形态上东北方影响力度更大。4)伊朗城镇空间分布存在区域不均衡性,但是这种不均衡性在时间序列上逐渐弱化。

Iran is an important node country in Belt and Road Initiative, city is the carrier of a country’s economic development.Therefore, the spatiotemporal analysis on the distribution of urban built-up areas in Iran can provide information for the future cooperation between China and Iran.Based on the image data of Iran from 2000 to 2015, this paper analyzes the evolution of urban space using mathematical statistical analysis, including standard deviation ellipse and kernel density estimation.The results show that: 1) Iran’s urban space expansion has increased year by year, and the predicament of economic development doesn’t make great effect on the speed of urban expansion.2) 49.35% of Western Iran is distributed with 81.62% of the urban space.The urban density of Iran shows a cluster-irregular axis distribution like "crab claw", which presents the spatial distribution pattern of "one area, upper line, middle line and lower line".3) The focus of urban space distribution in Iran moves to the Northwest in the overall direction, but the urban change in the northeast direction has a greater impact on its specific shape.4) There is a regional imbalance in the urban space distribution in Iran, but it gradually alleviates with time.