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Portal:Maps

From Wikipedia, the free encyclopedia

Main page   Maps

The Maps and Cartography Portal

World map by Gerard van Schagen, Amsterdam, 1689

In cartography, a map is a two-dimensional representation of the Earth's surface depicting the spatial layout of geographical features. Maps may also incorporate thematic information, such as demographic, economic, environmental, or other socio-economic data. A cartographer must make many decisions when designing a map, including the map scale, coordinate system, symbols, colors, labels, and typography. The selection of a map projection is a critical choice in map design, as every projection introduces characteristic distortions. The Mercator projection was widely used for centuries but has been criticized for depicting European nations enlarged compared to developing countries nearer to the equator.

Maps serve a wide range of purposes. One of the most common uses of maps is route planning, enabling users to find restaurants and other points of interest. Commercial and recreational traffic in the air and water use maps (called "charts" in this context): airplane traffic relies on aeronautical charts, and water traffic uses nautical charts. Scientists use maps to organize spatial data in fields such as geology, meteorology, seismology, and demographics.

Maps are used by governments for administrative functions such as census, electoral districts, property taxation, dispatching police, and coordinating disaster relief. Military and security organizations use maps for mission planning, surveillance, border management, logistics, and intelligence analysis.

One of the earliest preserved maps is from the Akkadian Empire (in modern Iraq) inscribed on a clay tablet and dated to 2300 BCE. In the 5th century BCE, Greeks were drawing maps of their known world, encompassing the Mediterranean Sea and most of Europe, North Africa, and the Middle East. Maps played a major role in the Age of Discovery and were carried by mariners as they explored new lands. The applications of cartography expanded in the late 17th century with the invention of thematic maps, which portrayed a specific kind of data – such as rainfall or population density – in contrast to simply portraying major geographic features such as rivers, mountains, and cities. The rapid expansion of road networks and mass transit systems in the 20th century created a market for mass-produced maps aimed at the traveling public.

The development of Geographic Information Systems (GIS) in the modern era enabled vast amounts of geographic data to be dynamically displayed on computer screens. Unlike paper maps, GIS permits users to interactively zoom, pan, and choose which data to view. Geographic data used for mapmaking may include imagery, scanned paper maps, surveying data, geographical features, and terrain (elevation) data. (Full article...)

Cartography (/kɑːrˈtɒɡrəfi/) is the study and practice of making and using maps. Combining science, aesthetics and technique, cartography builds on the premise that reality (or an imagined reality) can be modeled in ways that communicate spatial information effectively. (Full article...)

Torn piece of map with Arabic text
Surviving fragment of the Piri Reis map

The Piri Reis map is a world map compiled in 1513 by the Ottoman admiral and cartographer Piri Reis. Approximately one third of the map survives, housed in the Topkapı Palace in Istanbul. After the empire's 1517 conquest of Egypt, Piri Reis presented the 1513 world map to Ottoman Sultan Selim I (r. 1512–1520). It is unknown how Selim used the map, if at all, as it vanished from history until its rediscovery centuries later. When rediscovered in 1929, the remaining fragment garnered international attention as it includes a partial copy of an otherwise lost map by Christopher Columbus.

The map is a portolan chart with compass roses and a windrose network for navigation, rather than lines of longitude and latitude. It contains extensive notes primarily in Ottoman Turkish. The depiction of South America is detailed and accurate for its time. The northwestern coast combines features of Central America and Cuba into a single body of land. Scholars attribute the peculiar arrangement of the Caribbean to a now-lost map from Columbus that merged Cuba into the Asian mainland and Hispaniola with Marco Polo's description of Japan. This reflects Columbus's erroneous claim that he had found a route to Asia. The southern coast of the Atlantic Ocean is most likely a version of Terra Australis. (Full article...)

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Map of the Giza pyramid complex
Map of the Giza pyramid complex
Credit: MesserWoland
Map of the Giza pyramid complex, located 20 km (12.5 mi) southwest of Cairo, Egypt. This Ancient Egyptian necropolis consists of the Great Pyramid, the Pyramid of Khafre, and the Pyramid of Menkaure, along with a number of smaller satellite edifices, known as "queens" pyramids, causeways and valley pyramids, and most noticeably the Great Sphinx. The site has attracted visitors and tourists since classical antiquity, when these Old Kingdom monuments were already over 2,000 years old.

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Topics

Map examples

World

Metrication
Metrication
Credit: Astrokey44
World map showing metrication, color-coded by year of conversion.

Historical

South China Sea, 1906
South China Sea, 1906
Credit: Justhus Perthes See Atlas
Map of the South China Sea, including inset maps of the Singapore Strait, Jokohama, Batavia and the Sunda Strait, 1906.

Thematic

Tornado Alley
Tornado Alley
Credit: FEMA
Intense tornado activity in the United States. The darker-colored areas denote the area commonly referred to as Tornado Alley.

Geographic

Yellowstone's calderas
Yellowstone's calderas
Credit: USGS
Yellowstone National Park sits on top of three overlapping calderas.

Political

Extent of the Macedonian Empire
Extent of the Macedonian Empire
Credit: Captain Blood
Greatest extent of the Macedonian Empire under Alexander the Great.

Nautical

McMurdo Sound, Antarctica
McMurdo Sound, Antarctica
Credit: USGS

Categories

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Category puzzle
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Atlases and maps of the world at Wikimedia Commons

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