基于遥感夜间灯光数据的大连城市用地扩张的空间特征分析

Spatial characteristics analysis of urban land expansion in Dalian based on remote sensing night light data

为揭示大连城市用地扩张的空间分布特征,基于DSMP/OLS夜间灯光数据提取1998—2013年大连地域边界,并得到各地区的灯光阈值及地域边界分区统计面积。通过计算不同时期不同区域的城市用地增长景观格局指数,研究该市16年来的城市用地扩张方向、强度和空间景观格局变化,以揭示大连20年来城市用地扩张的空间分布特征。结果表明,城市用地扩张主要集中在沙河口区、中山区和西岗区,并以其为中心向甘井子区、旅顺口区、金州区等区域扩张。城市用地空间格局总体基本稳定,受地理条件、空间距离、经济发展和政策指引等因素的影响,城市用地扩张在不同方向上差异化显著。研究成果可作为大连城市规划的依据。

In order to reveal the spatial distribution characteristics of urban land expansion in Dalian city, the regional boundaries of Dalian city from 1998 to 2013 were extracted based on DSMP/OLS night light data, and the lighting thresholds and statistical area data of each district of Dalian city were obtained. By calculating the landscape pattern index of urban land use growth in different regions in different periods, this paper studies the direction, intensity and spatial landscape pattern change of urban land use expansion in the past 16 years in order to reveal the spatial distribution characteristics of urban land use expansion in Dalian in the past 20 years. The expansion of urban land is mainly concentrated in Shahekou District, Zhongshan District and Xigang District, and it extends to Ganjingzi District, Lyushunkou District and Jinzhou District. The overall spatial pattern of urban land use is basically stable. Influenced by geographical conditions, spatial distance, economic development, policy guidance and other factors, the urban land use expansion in different directions is significantly differentiated. The research can provide the basis for Dalian urban planning.