Forecast is a world map in which the size of each country is represented as proportional to the percentage of that nation’s average annual rainfall.
(Data sources: Food and Agrigulture Organization of the UN, Worldinformation.com, Countrywatch.com, CIA World Factbook)
Worldviews | Weltbilder
Joachim Hirsch, 69 Pender, 2005 (pdf)
Strains of thought in Antonia Hirsch's World Map Project
Monika Szewczyk, Fillip, 2006 (pdf)