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Learn how to obtain and add geographic coordinates to Wikipedia articles from various sources, such as maps, online services, directories, databases and calculators. Find out the preferred geotagging templates and the licensing information for different tools.
Learn how to measure and communicate positions on Earth using latitude and longitude, and how different geodetic datums affect the coordinates. Explore the history and standards of the geographic coordinate system and its applications in cartography and geodesy.
Learn how astronomers, cartographers and navigators discovered a means of determining the longitude of any place on Earth. The invention of the chronometer by John Harrison in the 18th century was a major breakthrough for accurate navigation at sea.
GEOREF is a grid-based method of specifying locations on the Earth, using a simpler and more flexible notation than latitude and longitude. It was used mainly for air navigation, and can identify quadrangles, areas, and altitudes with varying degrees of precision.
Learn about the definition, history and calculation of the geographical centre of Earth, the location on the surface where the sum of distances to all land is the smallest. Compare it with other definitions and concepts of the centre of the Earth.
Learn how to use stars and other celestial bodies to determine your position on Earth or in space without electronic devices. Celestial navigation uses angular measurements (sights) and tables to plot lines of position and intersect them on a chart.
Learn about the process of converting text-based descriptions of locations to geographic coordinates, and the history and applications of geocoding. Find out how geocoding relies on street networks, postal codes, and administrative boundaries.
The Degree Confluence Project is a World Wide Web-based all-volunteer project that aims to have people visit each of the integer degree intersections of latitude and longitude on Earth, posting photographs and a narrative of each visit online. The project describes itself as "an organized sampling of the world".
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