Any witness can report, via a variety of techniques, to a map-based data base of related pattern of problems, then other people can add additional information to any reported incident, such as follow-up details, closure, links to news stories. Haiti SOS
The #s indicate #s of incidents, at the location shown, where people needed help.Notice the categories of types of help needed, relevant to Haiti disaster. Reports
http://haiti.ushahidi.com/reports
are sorted to show most recent SOS on top.There's RSS news reader so people can get details and links about new incidents, as they are reported.When you look at ONE Incident, it is shown on the map as a red dot.Nearby there are orange dots locating other incidents.You can mouse over, click on, get full details on those other incidents.
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