Novakovskiy Boguslav Avgustovich RussiaMoscowMoscow State University, Leninskiye Gory, 1, Moscow 119991, Russiaprofessor of department of cartography and geoinformaticsDoctor of Geographic Sciencesdcaph@mail.ru Author's articles Cartographic Approach to Projecting of Ecological Monitoring Network on the Oil-and-Gas Sector Structure and Dynamics of Saratov City Geochemical Fields