Figure 3
From: Descriptive review of geographic mapping of severe acute respiratory syndrome (SARS) on the Internet
One of MapAsia's SARS distribution maps for Hong Kong. Web browser screenshot by this author of one of MapAsia's SARS distribution maps for Hong Kong as of 24 April 2003. Legend: orange circle buffer: some other case(s) within 250 m; yellow circle buffer: no other case within 250 m; red triangle: infected case; purple triangle: de-listed case. The toolbar to the left of the map provided the sort of functionality found in a standard desktop GIS interface.