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Description: This very large and beautifully hand coloured original antique Stereographic Northern Hemisphere map was engraved by John Neele in 1812 - the date is engraved at the foot of the maps - and was published by the famous Scottish publisher John Pinkerton in his large folio Modern Atlas, which was published between 1809-14. Background: The azimuthal equidistant projection is an azimuthal map projection. It has the useful properties that all points on the map are at proportionately correct distances from the center point, and that all points on the map are at the correct azimuth (direction) from the center point. A useful application for this type of projection is a polar projection which shows all meridians (lines of longitude) as straight, with distances from the pole represented correctly.While it may have been used by ancient Egyptians for star maps in some holy books, the earliest text describing the azimuthal equidistant projection is an 11th-century work by al-Biruni. The projection appears in many Renaissance maps, and Gerardus Mercator used it for an inset of the north polar regions in sheet 13 and legend 6 of his well-known 1569 map. In France and Russia this projection is named "Postel projection" after Guillaume Postel, who used it for a map in 1581. Many modern star chart planispheres use the polar azimuthal equidistant projection. (Ref: Tooley; M&B)
General Description: Paper thickness and quality: - Heavy and stable Paper colour: - off white Age of map colour: - Original & later Colours used: - Green, pink, yellow General colour appearance: - Authentic Paper size: - 31in x 22in (790mm x 560mm) Plate size: - 31in x 22in (790mm x 560mm) Margins: - min 1in (25mm) Imperfections: Margins: - None Plate area: - None Verso: - None