A method for generating a pixel-oriented graph provides visual boundaries for representing aggregate information. The present method for generating a pixel-oriented graph includes determining a visual boundary for representing an aggregate of a set of information depicted in the pixel-oriented graph and constructing a set of pixel blocks that represent the information such that the pixel blocks are visually distinguished by the visual boundary. A method according to the present techniques employs a visual weight to classify labels and high weight information is shown and other information is made invisible and hidden in the property of a graph.