Google Earth and Google Maps are probably the most popular, free, online cartography reference tools for the public. Popularity is not the same as authority though:
The lines that Google draws on maps have no government’s imprimatur.
Google should not be involved in geopolitical disputes. If Google Maps show borders or place names that are different from official or long-established usage, they can confuse, offend or worse, even if done unintentionally:
On Nov. 3, 2010, a Nicaraguan official justified his country’s incursion into neighboring Costa Rica’s territory by claiming that, contrary to the customary borderline, he wasn’t trespassing. For proof, he [cited] Google Maps.