Abstract
This paper proposes a tool that presents the link structure visually. Access probability is derived in place of PageRank as an indicator of the importance level of a webpage. The proposed tool draws a perspective diagram on a hemisphere. The diagram shows a website as a tree structure with its Home page at the root. The tree structure is built based on the distribution of the access probabilities and the scatter diagram of their regression line. In this perspective diagram, a webpage is represented by a globe primitive with the access probability as its volume. A link is represented by a cylinder primitive with the number of transitions between webpages as its radius. Each of these can be identified by selecting it. Whether a link should be visible or invisible (number of displayed elements) can be controlled using the access probability or the number of transitions as a threshold.
