It is important to recognize that even the most accurate maps sacrifice a certain amount of accuracy in scale to deliver a greater visual usefulness to its user.The width of roads and small streams are exaggerated when they are too narrow to be shown on the map at true scale on a printed map they would be narrower than could be perceived by the naked eye.
The same applies to computer maps where the smallest unit is the pixel. A narrow stream say must be shown to have the width of a pixel even if at the map scale it would be a small fraction of the pixel width.
Sometimes the scale of a map is distorted deliberately. The map of Europe shown here has been distorted to show population distributions. Clearly the basic scale is approximately uniform for the rough shape of the continent is still visible. This is an example of a cartogram.
Another example of distorted scale is the famous London Underground map. The basic geographical structure is respected but the tube lines are smoothed to clarify the relationships between stations. Near the centre of the map stations are spaced out more than near the edges of map.
Cartographers may simply omit military installations or remove features solely in order to enhance the clarity of the map. A road map may or may not show railroads, smaller waterways or other prominent non road objects, and even if it does, it may show them less clearly than the highways.
Known as decluttering, the practice makes the subject matter that the user is interested in easier to read, usually without sacrificing overall accuracy.
The Thirteen Colonies were part of what became known as British America, a name that was used by Great Britain until the Treaty of Paris recognized the independence of the original thirteen United States of America in 1783. These British colonies in North America rebelled against British rule in 1775, in what is called the American Revolution in the United States and the American War of Independence in other countries.
A provisional government was formed which proclaimed their independence, which is now celebrated as having occurred on July 4, 1776, and subsequently became the original thirteen United States of America.
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