Flowmap
Flowmap is a software package dedicated to analyzing and displaying interaction or flow data. This type of data is special in the sense that there are two different geographic locations connected to each data item: an origin location where the flow starts and an destination location where the flow ends. The flow data itself can consist of people (e.g. commuters, shoppers, hospital visitors), goods, usage of agricultural services or telecommunication and so on.
However, most thematic mapping and GIS packages have little functionality for treating this kind of information. Now Flowmap fills this gap. Flowmap is a PC software package (Windows 95/98/2000/ME/XP and will in most cases also work within Windows Vista and Windows 7), developed at the Faculty of Geosciences of the Utrecht University in the Netherlands.