3.3 Landscape representation
For this purpose, we can model the visualization medium, for a RGB color model, as composed of three planes. Each plane corresponds to one color channel, i.e. the red, green and blue channels, which control the intensity of each color. Then, for a 2.5-dimensional representation, we can assign, for example, to a visualization media
the following values:
with , , and being
where denotes the number of links of the resources represented on a given pixel, thus
the number of resources represented on a single pixel:
and an empirically determined value corresponding to the directory level found in the URLs.