Natural Risk Prevention Plans (NRPP) 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 Prefect and carried out by the Direction des Départementale des Territoires et de la Mer des Bouches-du-Rhône.
These plans regulate land use or land use through building prohibitions or requirements on existing or future buildings (constructive provisions, vulnerability reduction work, restrictions on agricultural use or practices, etc.).
These plans may be under development (prescribed), implemented in advance or approved.

The RPP 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 to map existing PPRNs on the department.
Each PPRN document 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 the order number of the associated PPR procedure in GASPAR):
1. its administrative procedure for drawing up (or revising) managed in the GASPAR application, on the one hand,
2. its set of numeric spatial data as described in the metadata sheet N_PPRN_AAAANNNN (#0001495).

风险预防计划（Risk Prevention Plans，PPR）由1995年2月2日发布的《加强环境保护法》确立，是国家在风险预防领域的核心管控手段。其目标为对存在重大风险的区域内的开发活动进行监测。PPR由省长批准，并由罗讷河口省领土与海洋局负责实施。此类计划通过对既有或新建建筑施加建筑禁令或相关要求（包括建设规范、降低脆弱性工程、农业使用或耕作限制等），规范土地利用行为。此类计划可处于编制（报批）、预实施或已批准三种状态。

PPR文档包含说明性报告、监管分区规划及监管条例，此外可附有助理解该方案的其他图文资料（如风险隐患、相关问题等材料）。每份PPR通过多边形矢量进行标识：若处于报批状态，则该多边形对应报批范围内受影响的全部市镇范围；若处于已批准状态，则该多边形对应受限区域的包络范围。

本地理数据表可实现该省内现有PPRN的空间制图。N_DOCUMENT_PPRN地理数据表中的每份PPRN文档，均与其格式为"ddd[PREF|DDT|DDTM|DREAL]aaaannnn"的GASPAR编码相关联（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）：其一为GASPAR系统中管理的PPR编制（或修订）行政流程；其二为元数据表N_PPRN_AAAANNNN（#0001495）中所描述的数值空间数据集。