Boundaries_PSA

View metadata for key information about this dataset. The PSA boundaries replaced a much smaller boundary, Sectors in 2009. In several Districts, PSA's split Sector boundaries and therefore a historical comparison would not necessarily be accurate. These polygon features were created by the Crime Mapping & Analysis Unit and they represent an initiative by the Philadelphia Police Department that started in 2009. A Police District can have up to 4 PSA's and as few as 2. There is a Police Lieutenant assigned to each PSA and officers are limited to patrol their specific boundary with the goal of familiarity with the area residents and businesses. See also the related datasets: Police Districts Police Divisions For questions about this dataset, contact [e-mail]. For technical assistance, email [e-mail].请查阅元数据以获取本数据集的关键信息。2009年，警务服务区（Police Service Area）边界取代了此前规模更小的辖区分区（Sectors）边界。在部分警察分局（Police District）中，警务服务区边界拆分了原有的辖区分区边界，因此历史对比数据未必具备准确性。此类面状地理要素由犯罪制图与分析单元（Crime Mapping & Analysis Unit）创建，是费城警察局（Philadelphia Police Department）于2009年启动的警务举措成果。单个警察分局可下辖最多4个、最少2个警务服务区。每个警务服务区均配备一名警署中尉（Police Lieutenant），警员仅可在所属边界内开展巡逻，旨在使其熟悉辖区内的居民与商户情况。相关数据集详见：Police Districts、Police Divisions。若对本数据集有疑问，请联系[e-mail]；如需技术支持，请发送邮件至[e-mail]。