PPRN document on the department of Orne in 2014

The Risk Prevention Plans (PPR) were established by the Act of 2 February 1995 on strengthening the protection of the environment. They are the key instrument of the State in the field of risk prevention. Their objective is to monitor development in areas exposed to a major risk.The PPRs are approved by the prefects and generally carried out by the departmental directorates of the territories (DDT). These plans regulate land use or land use through construction prohibitions or requirements on existing or future buildings (constructive provisions, vulnerability reduction work, restrictions on use or agricultural practices, etc.).These plans may be under development (prescribed), implemented in advance or approved.The PPR file contains a presentation note, a regulatory zoning plan and a regulation. Other graphic documents that are useful for understanding the approach (e.g. hazards, issues, etc.) can be attached. Each PPR is identified by a polygon that corresponds to the set of affected municipalities within the scope of the prescription when it is in the prescribed state; and the envelope of restricted areas when it is in the approved state. This geographical table allows mapping existing PPRNs on the department. Each PPRN document existing in the N_DOCUMENT_PPRN geographical table is linked with its GASPAR code in the format “ddd[PREF|DDT|DDTM|DREAL]aaaannnn” (AAAA and NNNN correspond to the reference year and order number of the associated PPR procedure in GASPAR): 1. its administrative procedure for the preparation (or revision) managed in the GASPAR application, on the one hand, 2. its set of numerical spatial constituent data described by the metadata sheet N_PPRN_AAAANNNN (#0001495) on the other hand.

风险预防计划（Risk Prevention Plans，简称PPR）由1995年2月2日颁布的《加强环境保护法案》确立，是国家在风险预防领域的核心工具，其目标是对存在重大风险的区域的开发活动进行监测。
PPR由省长审批通过，通常由领土事务部门主管局（Departmental Directorates of the Territories，简称DDT）负责实施。该计划通过针对现有及拟建建筑制定建设禁令、提出建设要求（包括建设条款、降低环境脆弱性工程、使用限制或农业生产活动限制等），对土地利用及开发行为进行规范。
该计划可分为三种状态：法定制定中、提前实施及已获批。
PPR档案包含说明性文件、管控区划图及管控条例，亦可附加其他有助于理解该方案的可视化资料（如风险灾害、核心问题相关图纸等）。
处于法定制定阶段的PPR，以覆盖其法定适用范围内全部受影响市镇的多边形矢量区域作为标识；处于获批阶段的PPR，则以管控区域范围的外包多边形作为标识。该地理数据表可用于绘制省内现存PPRN的空间分布图。
N_DOCUMENT_PPRN地理数据表中的每份PPRN文档，均绑定采用"ddd[PREF|DDT|DDTM|DREAL]aaaannnn"格式的GASPAR编码，其中AAAA与NNNN分别代表关联PPR流程在GASPAR系统中的参考年份与序号：其一为在GASPAR应用中管理的PPR编制（或修订）行政流程，其二为以元数据表N_PPRN_AAAANNNN（#0001495）描述的整套空间组成数值数据。