Dataset Direct Download Service (WFS): PPR Technological Document on the department of Bouches-du-Rhône

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 PPRTs on the department. Each PPRT document existing in the N_DOCUMENT_PPRT 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_PPRT_AAAANNNN (#0001496) on the other hand.风险预防计划（Risk Prevention Plans, 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治理工具，其目标是对面临重大风险的区域开展发展动态监测。PPR由省长批准，通常由领土事务省局（Direction Départementale des Territoires, DDT）负责实施。此类计划通过针对新建或既有建筑出台建设禁令或相关要求（包括建设规范、降脆弱性工程、使用限制或农业生产规范等），对土地利用与开发进行规制。此类计划可处于编制指令阶段（即已下达编制任务）、提前实施或已获批状态。PPR档案包含编制说明、规制分区图则与规制文本。其他有助于理解该计划实施逻辑的图示文档（如风险分布、相关议题等）可作为附件追加。每份PPR均通过多边形进行空间标识：若处于编制指令阶段，该多边形对应指令覆盖范围内受影响的全部市镇集合；若处于获批阶段，则对应受限区域的范围包络线。此地理数据表可用于在省内绘制现有PPRT的空间分布。地理数据表N_DOCUMENT_PPRT中收录的每份PPRT文档，均与其GASPAR编码相关联，该编码格式为"ddd[PREF|DDT|DDTM|DREAL]aaaannnn"（其中AAAA与NNNN分别对应GASPAR系统中关联PPR流程的参考年份与序号）：其一，关联GASPAR系统中管理的PPR编制（或修订）行政流程；其二，关联由元数据表N_PPRT_AAAANNNN（编号#0001496）所描述的全套数值空间构成数据。