The cadastre plan is an administrative document that proposes the only large-scale parcel plan covering the national territory.

The plan of a commune’s cadastre is divided into sections, which can be divided into subdivisions of sections, commonly referred to as “plan sheets”.

— The cadastral section is a part of the communal territory whose perimeter is usually made up of boundaries of relatively stable character on the ground (road, roads, watercourses...).

— The plot is the basic cadastral unit. It is a single-contained plot located in the same place and belonging to the same owner.

— The plan of the cadastre in vector format derives mainly from the digitisation of the cadastral plan paper or raster carried out in the framework of agreements with local and regional authorities. To a lesser extent, it was produced directly in digital format in the context of the production of new cadastral plans (recasting 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 compliant” projections. Georeferencing of vector plans could be obtained:

— during their making (in the case of very recent cadastral plans);

— after conversion of their coordinates expressed in the Lambert zones projection;

— during vectorisation (cases not initially georeferenced)

Collection context

The cadastral plans in vector format managed and exported by the DGFiP services were produced from the other field. Depending on the plan sheets, vectorisation and georeferencing conditions are diverse. This information is available on the fact sheets of each of the municipalities.

Collection method

The cadastral plans in vector format managed and exported by the DGFiP services were produced from the other field. Depending on the plan sheets, vectorisation and georeferencing conditions are diverse. This information is available on the fact sheets of each of the municipalities.

Cadastral plans are of several types:

—updated plans: these are cadastral plans updated from the frame of the Napoleonic cadastral plans. They're not regular plans. These plan sheets are identifiable by their single letter section (e.g. “section A”). The scales of plan sheets can be variable and are mainly at the following scales: 1/1250, 1/2500 and 1/5000;

— ‘regular’ plans: these are plans that were made during the renovation of the cadastre without repeating the pattern of Napoleonic plans. Among these plans, there are two categories:

— the so-called “renewed” plans: these are plans which have not been the subject of a conflicting delimitation of the properties on the ground when they were drawn up;

— “remade” plans which have been subject to conflicting demarcation of properties;

Where the cadastral plan is no longer able to meet the needs (in particular because of its scale or its possible inaccuracy), it may be redrafted in accordance with the ‘reshuffle’ procedure laid down by Law No 78-645 of 18 July 1974.

Cadastral plans resulting from land development operations are referred to as “remembered plans”.

The identifier of a plan sheet is of the form: “DDCCCPPPSSNN” where:

— “DD” is the number of the department;

— “CCC” means the INSEE code of the municipality;

— “PPP” is the section prefix. By default this prefix is equal to “000” except in the following cases:

— in case of absorption of a commune, this prefix shall have the value of the INSEE code of the absorbed municipality;

— in the case of municipalities in arrondissements, this prefix contains the district code (for Paris from 101 to 120, for Lyon from 381 to 389, for Marseilles from 201 to 216, in the case of the city of Toulouse, this is the district code taking the values from 801 to 846).

— “SS” is the designation of the section “cadastrale” (in case of a single section letter, the section letter is preceded by the number “0” e.g. “section 0A”);

— “NN” is the sheet number (“01” by default)

For more information, see the metadata on the Isogeo catalog.

Le plan du cadastre est un document administratif qui propose l’unique plan parcellaire à grande échelle couvrant le territoire national.

Le plan du cadastre d’une commune est découpé en sections, elles-mêmes pouvant être découpées en subdivisions de sections, communément appelées « feuilles de plan ».

• La section cadastrale est une portion du territoire communal dont le périmètre est généralement constitué par des limites présentant un caractère relativement stable sur le terrain (route, chemins, cours d’eau…).

• La parcelle est l’unité cadastrale de base. C’est un terrain d’un seul tenant situé dans un même lieudit et appartenant à un même propriétaire.

• Le plan du cadastre au format vecteur est issu majoritairement de numérisation du plan cadastral papier ou raster réalisée dans le cadre de conventions avec les collectivités territoriales. Dans une moindre mesure, il a été confectionné directement au format numérique dans le cadre de la production de plans cadastraux neufs (procédure du remaniement prévue par la loi n° 78-645 du 18 juillet 1974) ou d’aménagements fonciers agricoles et forestiers (communément désignés sous le terme « remembrements »).

Les plans cadastraux au format vecteur en France métropolitaine sont actuellement géoréférencés dans le système légal (RGF93) à l’aide des projections « coniques conformes 9 zones ». Le géoréférencement des plans vecteur a pu être obtenu :

• lors de leur confection (cas des plans cadastraux très récents) ;

• après transformation de leurs coordonnées exprimées dans la projection Lambert zones ;

• lors de leur vectorisation (cas des plans non initialement géoréférencés)