The information visualised on maps are grouped in two main units according to the general system of the ENFO knowledge base: Basic knowledge and Practical use.

Both units contain the elements used in the Photo Gallery and the E-learning matrix: ex. the Basic Knowledge unit includes the chemicals, the minerals and rocks, the ecosystems and various living organisms; the Practical use unit includes the chemicals, the environmental elements, the wastes, the noise and vibrations and the contaminated sites.

The map types used for data visualisation are: digital maps, google maps and scanned (static) maps.

The digital maps belong to the ENFO project interactive GIS map database. The IT tool enables on-line work and access.

The google maps visualise data uploaded on a google background map. 

The scanned maps are uploaded in the Basic knowledge az Practical use folders.