‘Finally, a word about the Weather.’ With these words, the BBC Trust began an unusual paragraph in their 2007 report on impartiality (BBC Trust 2007:53). The advent of a new three-dimensional visualisation of the weather in May 2005 had prompted immediate criticism. The images suggested northern Scotland was on the periphery, while south-east England was in the forefront. In its own odd way this controversy touches on an important issue in visualisation and depiction, and on the relationship between those two things.

This was a paper for the AHRC IT Methods Workshop ‘From Abstract Data Mapping to 3D Photorealism.’ The workshop title could be taken to imply that abstract data mapping (visualisation) and photorealism (an extreme form of depiction) are as far apart as can be, perhaps even that they are opposites. By contrast, this paper explores some aspects they have in common. Boyd Davis argues that it is productive to think of depiction as a form of visualisation, and to think of it as therefore subject to many of the same design considerations.