Most of the scientific and technical databases contain codes. These codes divide the area of the database field in subfields. These divisions can be used to map automatically the research network of a subject, and to provide its main research poles. The present paper explains the methodology, and applies it toChemical Abstracts, and to the analysis of the research production of various academic institutions. The method is general and can be used with other databases such as Inspec, WPI-WPIL, etc...