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These are azimuthal orthographic projections of the Earth from four sides plus the poles. 726x726 pixels, aliased. XCFs have separate layers for water, land, coastlines, political borders, political borders over water (not shown in PNGs), and latitude & longitude gridlines (not shown in PNGs). Image:Blankmap-ao-000 -africa europe.png XCF
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The following other wikis use this file: Usage on bg.wikipedia.org Географска координатна система; Usage on bs.wikipedia.org
This image is a derivative work of the following images: File:World_map_longlat.svg licensed with Cc-by-sa-3.0 . 2009-08-19T12:19:11Z Thesevenseas 1200x684 (819861 Bytes) Removed Borders and Thickened Latitude and Longitude Lines
Earth's graticule. The vertical lines from pole to pole are lines of constant longitude, or meridians. The circles parallel to the equator are lines of constant latitude, or parallels. The graticule shows the latitude and longitude of points on the surface. In this example meridians are spaced at 6° intervals and parallels at 4° intervals.
Some, such as al-Khwarizmi, further developed these works, including creating maps on a graticule of latitude and longitude. During the European Middle Ages, graticules disappeared from the few maps that were produced; T and O maps in particular were more concerned with religious cosmology than accurate representation of location.
The second digit (x0xx through x8xx) indicates the number of tens of degrees latitude (north in global quadrants 1 and 7, south in global quadrants 3 and 5) of the 'minimum' square boundary (nearest to the Equator), i.e. a cell extending between 10°N and 20°N (or 10°S and 20°S) has this digit = 1, a cell extending between 20°N and 30°N ...
English: The definition of latitude (φ) and longitude (λ) on an ellipsoid of revolution (or spheroid). The graticule spacing is 10 degrees. The graticule spacing is 10 degrees. The latitude is defined as the angle between the normal to the ellipsoid and the equatorial plane.