The process of development of an ontology-based knowledge portal and creation of its content is time-consuming and laborious. The lifetime of such portals is sufficiently long and they collect a great volume of valuable information. This information can be analyzed from various points of view. This paper describes an extension of the visualization subsystem, developed the A.P. Ershov Institute of Informatics Systems, with new tools for visual analysis. An example of extracting information about scientific cooperation from the content of a knowledge portal and two ways of its visualization are demonstrated.