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The Ptolemy world map is a map of the world known to Greco-Roman societies in the 2nd century. It is based on the description contained in Ptolemy 's book Geography, written c. 150. Based on an inscription in several of the earliest surviving manuscripts, it is traditionally credited to Agathodaemon of Alexandria .
A world map is a map of most or all of the surface of Earth. World maps, because of their scale, must deal with the problem of projection. Maps rendered in two dimensions by necessity distort the display of the three-dimensional surface of the Earth. While this is true of any map, these distortions reach extremes in a world map.
In geology, a continent is defined by continental crust, which is a platform of metamorphic and igneous rock, largely of granitic composition. Continental crust is less dense and much thicker than oceanic crust, which causes it to "float" higher than oceanic crust on the dense underlying mantle.
The land hemisphere and water hemisphere are the hemispheres of Earth containing the largest possible total areas of land and ocean, respectively. By definition (assuming that the entire surface can be classed as either "land" or "ocean"), the two hemispheres do not overlap. Determinations of the hemispheres vary slightly.
Borders of the oceans. The borders of the oceans are the limits of Earth 's oceanic waters. The definition and number of oceans can vary depending on the adopted criteria. The principal divisions (in descending order of area) of the five oceans are the Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern (Antarctic) Ocean, and Arctic Ocean.
Ocean exploration is a part of oceanography describing the exploration of ocean surfaces. Notable explorations were undertaken by the Greeks, the Romans, the Polynesians, the Phoenicians, Phytheas, Herodotus, the Vikings, the Portuguese and Muslims. Scientific investigations began with early scientists such as James Cook, Charles Darwin, and ...
File:World Map Blank - with blue sea.svg. Size of this PNG preview of this SVG file: 800 × 447 pixels. Other resolutions: 320 × 179 pixels | 640 × 358 pixels | 1,024 × 572 pixels | 1,280 × 715 pixels | 2,560 × 1,430 pixels | 2,753 × 1,538 pixels. Original file (SVG file, nominally 2,753 × 1,538 pixels, file size: 3.46 MB) This is a ...
The parameters align (left, center, or, by default, right) and size (default 300px width) may be used to set the template's horizontal position and the image's size per, respectively, the Location and Size entries here.
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