The article presents algorithmization of notation design process using computer technologies for environmental maps design. Cartographic models displaying natural resources are considered as an example. The results of model color design based on developed coloristic principles for the adjacent territory in the area of the “Sary-Uzen” test site of the former Semipalatinsk Nuclear Test Site are presented. As a solution of environmental mapping tasks, the authors have shown the possibilities of territories assessment and using the results to create and update thematic layers in the GIS.