[IEEE Application of the Conversion Research Results for International Cooperation. SIBCONVERS'99. Third International Symposium. (Cat. No.99EX246) - Tomsk, Russia (May 18-20, 1999)] Application of the Conversion Research Results for International Cooperation. SIBCONVERS'99. Third International Symposium. Proceedings (Cat. No.99EX246) - The use of the multilevel mathematical models of engineering network for geoinformation monitoring