[en] The ISTC 2097 RadInfo project entitled 'The Development of a Sophisticated Information System Including a Meta-Database and Regional Radioecological Cadastres for Assessment of the Radiation Impact on the Environment and Population. Evaluation Study of the North-West Russia and Krasnoyarsk Region' launched on August 1, 2002 is based on use and substantial extension of information system formed in previous five-year period within the framework of the ISTC 245 RADLEG project and describing radiation-hazardous objects of the FSU nuclear complex. Under the project the RADLEG-RadInfo information system development is anticipated including formation of a number of new components, such as: a meta-database describing primary information resources related to characteristics of radiation-hazardous objects of the FSU states, regional radioecological cadastres on radioactive source-terms and contamination in the North-West Russia and Krasnoyarsk region, subject-oriented radioecological cadastres (peaceful nuclear explosions, NPP radioecology etc). For the present designing of the RadIinfo meta-database has been completed. On the basis of a conceptual model developed earlier in the form of entities diagram (Entity Relationship (ER)-model), a physical data model has been constructed. It means that tables and descriptions of the database structures for chosen DBMS have been formed. For that purpose the MS ACCESS-97/ 2000 DBMS was used. A demonstration prototype, based on designed meta-database, has been formed. The MDB users interface (a data input form) has been developed. A radioecological GIS-cadastre of the Krasnoyarsk Mining and Chemical Combine radioactive waste storage and disposal sites, presenting the radiological status of the Yenisei River flood plain in the Combine impact zone, as well as a regional radioecological cadastre of the North-West Russia have been formed. For the GIS-cadastres preparation digital maps at the following scale were chosen: Regional - 1:8 000 000 and 1:1 000 000; Subregional - 1:200 000; Local - 1:50 000 and larger. The digital maps basic and subject-oriented layers have been determined, including the relief, administrative division, settlements, hydrography, roads, vegetation, etc. The following information is given in attributive tables of the cadastre: a brief characterization of the M and CC activity; brief characterization of the 'Severny' disposal site (geology, location, process of liquid radwaste disposal, environmental monitoring); radioecological situation in the Combine impact zone (general characteristics of the sanitary protective zone and observation zone, radioactive contamination of the atmospheric air, rivers and other water objects, radioactive contamination of fish in the Yenisei River, population dose rates). Works aimed at formation of a radioecological GIS-cadastre of the North-West Russia are on. The following components of the system have already been prepared: a local radioecological cadastre of the Kola NPP; digital 1:1 000 000 maps of the region administrative division and radiation-hazardous objects location; the Murmansk oblast map showing Kola NPP and radiation monitoring points in the 100-km observation zone; a digitized sketchy map of the Kola NPP radioactive waste storage facilities location. Two databases, one of them on main sources of radioactive contamination in areas around nuclear power plants in the Russian Federation, and the other - on legal, methodological and regulatory documents related to environmental radioprotection, have been formed. (authors)