In this paper the major characteristics of spatial data, its infrastructure and main components are discussed. Herein, spatial metadata and software and technical support for geoportals, as well as their services are examined. In this work technologies of development of applied geoinformational web-systems (geoportals) are discussed. Within the paper the software architecture and web services of the geoportal of Institute of Computational Modeling of Siberian Branch of Russian Academy of Sciences is presented.