The Atlas Portal
An atlas is a collection of maps, traditionally bound into book form, but now most often found in multimedia formats. As well as geographic features and political boundaries, many often feature geopolitical, social, religious and economic statistics.
The first known book that could be called an atlas was constructed from the calculations of Claudius Ptolemy, a Greek geographer working in Alexandria circa A.D. 150. The first edition was published in Bologna in 1477 and was illustrated with a set of 27 maps, though scholars say that it is not known whether the printed maps were engraved versions of original maps made by Ptolemy, or whether they were constructed by medieval Greek scholars from Ptolemy's text.
The origin of the term atlas is a common source of misconception, perhaps because two different mythical figures named 'Atlas' are associated with mapmaking. King Atlas, a mythical King of Mauretania, was, according to legend, a wise philosopher, mathematician and astronomer who supposedly made the first celestial globe. However, the more widely known Atlas is a figure from Greek mythology.
An atlas is a collection of maps; it is typically a map of Earth or a region of Earth, but there are atlases of the other planets (and their satellites) in the Solar System. Furthermore, atlases of anatomy exist, mapping out the human body or other organisms. Atlases have traditionally been bound into book form, but today many atlases are in multimedia formats. In addition to presenting geographic features and political boundaries, many atlases often feature geopolitical, social, religious and economic statistics. They also have information about the map and places in it
A contour line of a function of two variables is a curve along which the function has a constant value. In cartography, a contour line joins points of equal elevation above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness of slopes. The contour interval of a contour map is the difference in elevation between successive contour lines.
Contour lines are curved or straight lines on a map describing the intersection of a real or hypothetical surface with one or more horizontal planes. The configuration of these contours allows map readers to infer relative gradient of a parameter and estimate that parameter at specific places. Contour lines may be either traced on a visible three-dimensional model of the surface, as when a photogrammetrist viewing a stereo-model plots elevation contours, or interpolated from estimated surface elevations, as when a computer program threads contours through a network of observation points of area centroids. In the latter case, the method of interpolation affects the reliability of individual isolines and their portrayal of slope, pits and peaks.
||The president of Iran should remember that Iran can also be wiped off the map.
|— Shimon Peres
Things you can do
Here are some Geography
related tasks you can do:
- Requested Articles: Geographical feature, Glossary of geography terms, Demographics of Oceania, Regions of North America, Regions of South America, Regions of Oceania (See Regions of Africa as example) More...
- Wikify/Cleanup: Geography, Philosophy of Geography, History of geography, Holarctic, Geostatistics, Kriging, Geographic Information Systems, Urbanism, Wikipedia:Requested pictures/Places, List of map-changing events by date, Valley More...
- Expand: Cycle of erosion, Outer Continental Shelf More...
- Improve to GA: See Category:B-Class geography articles More...
- Improve to FA: Anahim hotspot, Erg (landform), Great Barrier Reef, Geyser, History of Earth, Mount Garibaldi, Palm Island, Queensland, Topic outline of geography More...
- Projects: Lists of basic country topics (one for each country), List of geography topics (See List of psychology topics as an example), List of geographers