Abstract: Increasing urban expansion leads to vunerability of numerous cities to problems such as flooding, earth quake, security indicents, and smog catastropy. Citysafety has increasingly drawn attention from researchers, governments and general public worldwide, and consequently safety oriented urban planning gradually emerges. In this paper, based on data of land use, population statistics, traffic network data and green shelter data,use landscape pattern index, multi-scale analysis, network analysis tools and proximal area method to make spatial analysis in ArcGIS10.2 and Fragstats (ver 4.2.1) software platform. then besed on above calculation result to built similarity model of City Safety and evaluate similarity of city security environment from the perspective of St Petersburg and Dalian city landscape pattern,we found in St Petersburg city and Dalian city security environment,landscape pattern of population density is high similar,the landscape pattern of land use is middle similar,landscape pattern of traffic network is low similar,,landscape pattern of green shelter is not similar. by comparison,St Petersburg shows advantages in traffic efficiency and the accessibility of green shelter. Dalian shows its advantages in spatial distribution of three functional land use "industry-live-green space" and the centrality of population and transportation network, In the future,in construction of urban safety space,Dalian should focus on improving traffic efficiency and the accessibility of green shelter to enhance urban security.

摘要： 城市不断膨胀使其在面对城市内涝、地震、危险事故、雾霾等危害时显现了更多的脆弱性，使得城市安全问题越来越受到广泛关注和重视，随之以安全城市为目标的城市规划与城市研究逐渐兴起。本文基于土地利用数据、人口统计数据、交通网络数据和避难绿地数据，运用景观格局指数、多尺度分析、城市网络分析工具、邻域法等方法，在ArcGIS10.2和Fragstats （ver 4.2.1）软件平台上进行空间分析，然后在以上计算结果基础上建立城市安全相似性模型对圣彼得堡和大连市景观格局视角下城市安全环境的相似性进行评价，结果显示：圣彼得堡市和大连市人口密度景观格局表现为相似，土地利用景观格局较为相似，交通网络景观格局较不相似, 避难绿地景观格局最不相似;相比而言，圣彼得堡在交通效率和避难绿地整体可达性两方面显示出优势，而大连则在“工业-居住-绿地”三大功能用地空间布局以及人口与交通网络中心性两个方面显示出优势；大连今后城市安全空间建设应注重提升交通效率和避难绿地整体可达性，以提升城市安全性。