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Maps are graphic representations of the surface of the earth or particular geographic regions. Maps can represent physical, political, climatic, geologic, or other aspects of geography. Most are two-dimensional, but three dimensional maps are also useful, including those which represent topography in relief.

Maps are among the earliest form of written human records, having developed through various levels of sophistication. Notable advancements were seen in the Ptolemeic period when the concept of scale was introduced, in the 16th century with the invention of the Mercator Projection to accurately account for the curvature of the earth, and with the subsequent introduction of standardized longitude and latitude. The most recent advances in map technology have come with the application of satellite photography as a source for more accurate mapping data.

The most famous historic maps are probably Claudius Ptolemy's 2nd century map of the ancient world from his Geographia and Abraham Ortelius' Mapa Mundi of 1570.

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About Dave Nalle

Dave Nalle is Executive Director of the Texas Liberty Foundation, Chairman of the Center for Foreign and Defense Policy, South Central Regional Director for the Republican Liberty Caucus and an advisory board member at the Coalition to Reduce Spending. He was Texas State Director for the Gary Johnson Presidential campaign, an adviser to the Ted Cruz senatorial campaign, Communications Director for the Travis County Republican Party and National Chairman of the Republican Liberty Caucus. He has also consulted on many political campaigns, specializing in messaging. Before focusing on political activism, he owned or was a partner in several businesses in the publishing industry and taught college-level history for 20 years.