The Balloon Browser recognizes and highlights geo-coordinates in web pages. Hovering over a recognized location advises another application to show a map of the corresponding area. For now the only program Balloow Browser can interact with is Google Earth.Instead of waiting for the one true geo-notation and markup standard, Balloon Browser tries to parse a variety of common coordinate notations. Ambiguous information like a missing hemisphere identifier are reconciled by looking at the context or the probability of a certain location. Thanks to the GPS system and low-cost devices that can be used by everybody, the number of websites tagging their content with geo-coordinates (using latitude and longitude) is increasing rapidly.