1. THE UTILIZATION OF GEOGRAPHICAL INFORMATION SYSTEM (GIS) TECHNOLOGY IN THE GENERAL CADASTRE. Authors: V. DOHOTAR, I.E. KELLER.2. THE REALIZATION OF A MODERN GEODETIC CONTROL NETWORK USING THE GPS. Authors: V. DOHOTAR, I.E. KELLER.3. RISK ASSESSMENT IN CASE OF FAILURE IN THE WATER SUPPLY SYSTEM. Authors: I.E. KELLER, I. HAIDU.