Definition of basic terms. Data organization levels. Data structure. Structure of data saving. Forms of data organizing. Data organizing in the data base management systems. Geo-information technologies. IS term definition. Data, three-dimensional/spatial data, geo-data. Geo-elements, constituents of geo-element description, geometric component of description. Coordinate systems of map works, transformation. Resources of geo-scientific and environmental data and their format. Environment for IS implementation in environmental practice. Methods of three-dimensional data collection. Basic survey on data available on the market. Basic geostatic calculations.