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With respect to weather maps, '…the Web has to offer something to almost everyone, and a lot to someone with knowledge of, or interest in, weather phenomena.' First, the main characteristics of the Web as a medium for dissemination and use of weather maps and television are compared. It seems that these media are tailored to different kinds of use. Main differences are found in the products disseminated, in access, spatial coverage and up-to-dateness. The Web offers maps, but also weather data, online visualisation tools and downloadable software to produce maps.
Next, the chapter gives an impression of the variety of maps. Four categories are distinguished. 'Weather maps in a narrow sense' are mainly based on observations at weather stations. They show conditions of the atmosphere in the immediate past or present, or forecast future conditions. 'Satellite image maps' and 'radar image maps' usually display recent or current conditions of the atmosphere, but sometimes also short term forecasts. Their sources and appearances differ. The category 'other weather and weather-related maps' refers to maps in archives, climatic maps and maps of specific phenomena, like uv forecasts, hurricanes and the ozone layer. For each category some background information and selected examples are provided. The selection illustrates that North-America is best endowed with weather information, while e.g. Africa is less well-provided. Many of the static examples offer at least some interaction. Dynamic maps are most common among satellite and radar image maps. Sophisticated examples, like VRML scenes, are found in the last category.
The chapters ends with some expectations. They are related to ongoing technological, professional and commercial developments. One such development is a trend towards customised weather provision on mobile phones. Finally, it is hoped that in the near future weather maps will be made accessible to a broader audience.

Last updated April 17, 2002