Cadastre in Brittany — Parcelles

The cadastre plan is an administrative document that proposes the only large-scale parcel plan covering the national territory. The plan of the cadastre of a commune is divided into sections, which can be cut into subdivisions of sections, commonly referred to as “plane leaves”. — The cadastral section is a part of the communal territory whose perimeter is usually composed of boundaries with a relatively stable character on the ground (roads, roads, watercourses, etc.). — The plot is the basic cadastral unit. It is land of one tenant located in the same place and belonging to the same owner. — The plan of the cadastre in vector format is the result of the digitisation of the paper or raster cadastral plan carried out in the framework of agreements with local authorities. To a lesser extent, it was made directly in digital format in the context of the production of new cadastral plans (redesign procedure provided for by Law No 78-645 of 18 July 1974) or agricultural and forestry land development (commonly referred to as ‘rememberments’). Cadastral plans in vector format in metropolitan France are currently georeferenced in the legal system (RGF93) using “conical 9 zones” projections. The georeferencing of vector planes could be obtained: — when they are made (cases of very recent cadastral plans); — after transformation of their coordinates expressed in the Lambert Zone projection; — during their vectorisation (case of plans not initially georeferenced)地籍图是一份行政文书，为覆盖国家全域的唯一大比例尺宗地平面图。 市镇地籍图划分为若干区段，这些区段可进一步拆分为地籍区段细分单元，通常俗称"图幅"。 —— 地籍区段为市镇领土的一部分，其边界通常由实地相对稳定的地物构成，如道路、公路、水道等。 —— 宗地是基本地籍单元，指坐落于同一地点、归属同一所有者的单一使用者所占用的土地。 —— 矢量格式地籍图是通过与地方当局合作开展的纸质或栅格地籍图数字化工作形成的成果。在少数情况下，此类矢量图也可直接以数字格式制作，用于新编地籍图（依据1974年7月18日第78-645号法律规定的重新编制流程）或农林用地开发项目（通常俗称"地籍记事（rememberments）"）。 目前法国本土的矢量格式地籍图均采用"圆锥9区"投影，在法定坐标系RGF93下完成地理配准。 矢量地籍图的地理配准可通过以下三种方式实现： —— 于图件制作时完成（适用于极新编制的地籍图）； —— 对采用兰伯特投影坐标系的坐标进行转换后完成； —— 在数字化过程中完成（适用于初始未进行地理配准的图件）