[en] Cartogram is a device able to localize contaminated zones in nuclear facilities. It is made up of a single camera responsive to both light photons and gamma radiations, a hardened transportable computer and a specially designed software. Cartogram achieves in a few minutes'time the superimposition of the real picture of the zone with the map of the gamma contamination. Radioactivity is represented by different colours according to the value of the gamma dose rate detected. A single cable links the camera to the computer (maximal length: 200 m), the camera can be remotely handled through the computer. Cea, Cogema and the French company: Canberra-Eurisys have worked on this project and today 12 Cartogram have already be sold. The price of such a camera varies from 150.000 to 200.000 Euros according to the optional specificities. (A.C.)