The maps most commonly seen in classrooms and offices are political maps of the world, countries and continents. An incredible number of political maps have been prepared just to display the geography of the United States. Most counties, boroughs and parishes are further subdivided into even smaller political units. There are maps of the entire nation, maps for each of the 50 states, maps of the 3142 counties (parishes in Louisiana, and boroughs in Alaska) that make up the states. Thousands of different political reference maps have been prepared to show the current geography of the United States. Some of the most popular searches are for " united states map", " world map", " europe map", and " florida map". Every day millions of people visit search engines to find political reference maps. Political maps are often printed on paper or another physical medium, but they can also be produced in digital form, suitable for viewing online. They are also known as "reference maps" because people refer to them again and again as they have questions. They are usually the first type of map that students are introduced to in school. Political maps help people understand the geography of the world. They show roads, cities and major water features such as oceans, rivers and lakes. They show the geographic boundaries between governmental units such as countries, states, and counties. They are mounted on the walls of classrooms throughout the world. "Political maps" are among the most widely used reference maps. In the sections of this article below, you will find several examples of commonly used reference maps and thematic maps. Income maps and resource maps are other types of thematic maps. Then temperature data is plotted atop of the reference map using colors to communicate the temperature forecast. They are made by starting with a reference map of the United States. Weather maps showing daily high temperatures across the United States are familiar examples of a thematic map. Thematic maps show the variation of a topic (the theme) across a geographic area. A variety of reference maps have been created for almost every country of the world. Political maps, physical maps, road maps, topographic maps, time zone maps, geologic maps, and zip code maps are all examples of reference maps. Reference maps show the location of geographic boundaries, physical features of Earth, or cultural features such as places, cities, and roads. Most of these maps can be placed into one of two groups: 1) reference maps and, 2) thematic maps. Millions of unique maps are in use throughout the world.
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