Since the earliest days of world exploration, maps have told compelling stories to people who may never see the places depicted. Topographical lines on paper only go a small way to recreate the traveller's experience, however, and the rest depends on the viewers' imagination. Now, personalized and interactive maps are stretching those boundaries, and helping nonprofits to bring their messages home. Hundreds of millions of people now use Google Earth and Google Maps to explore the world around them.
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