Construction of basic graphic elements library for geoinformation ecological monitoring system

An approach to the formation of operational visibility and ecological risks scene displaying in geographic information systems (GIS) of environmental protection is offered. The approach is based on structural-symbolic method of presenting the basic graphic elements (BGE) (models) of ecological risks, the linguistic rules and grammar construction of BGE on the basis of a given set of contours, BGE connectivity graph and set-theoretic operations of ecological risk maps synthesis using GIS. The main methods of structural electronic BGE library construction described in the article: direct structural-symbolic method of ecological risks graphical models representing; linguistic method of representing the alphabet and ecological risk models; program and program-linguistic method for representing the alphabet of basic graphic models of ecological risks.