The IGN (French National Geographic Institute) is a publicly-owned establishment placed under supervision of the French Infrastructure, Transport, Tourism, and Maritime Ministry and the Regional planning authorities.

The Institute is responsible for the production, the maintenance and the diffusion of the reference geographical data in France to various stakeholders whether they are private or public establishments.

Summary:

The goal of the IGN (French National Geographic Institute), through its BDParcellaire Project is to create a seamless set of raster cadastral data for the whole country using individual scanned cadastral maps (100.000 maps for 2005-2006). This 1.000.000€ exercise consists of georeferencing all these maps using ortho-photos and road vector data as a reference, rubbersheeting and edgematching using state-of-the art software that takes into account scale, age and quality of the maps. The final stage of the project is to digitize cadastral divisions using the georeferenced cadastral maps.

For the delivery of such a high quality product, tough quality assurance procedures, validated by the IGN, have been put in place for each step of the production.

The output products are a set of georeferenced cadastral tiles of 1 sq.km for an area of around 100.000 sq.km, a vector version of division and commune boundaries and a georeferenced parcel centroid layer.