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One difference is the y axis is positive northwards in TMS, and southwards in OpenStreetMap. Web Map Tile Service: a more recent Open Geospatial Consortium (OGC) standard. The de facto XYZ standard referred to above. TileJSON: a lightweight JSON description of all the parameters associated with a web map, created by Mapbox. [5]
On a Mercator projection map, any rhumb line is a straight line; a rhumb line can be drawn on such a map between any two points on Earth without going off the edge of the map. But theoretically a loxodrome can extend beyond the right edge of the map, where it then continues at the left edge with the same slope (assuming that the map covers ...
A rhumb line in the modern sense is only straight on a chart drawn with the Mercator projection, but not on charts from the 13th–16th centuries. [2] Older windrose lines were a close approximation on charts of the Mediterranean Sea and surrounding areas, but the rhumb lines on small-scale maps such as the Teixeira planisphere were highly ...
Gerardus Mercator (/ dʒ ɪ ˈ r ɑːr d ə s m ɜːr ˈ k eɪ t ər /; [a] [b] [c] 5 March 1512 – 2 December 1594) [d] was a Flemish geographer, cosmographer and cartographer.He is most renowned for creating the 1569 world map based on a new projection which represented sailing courses of constant bearing (rhumb lines) as straight lines—an innovation that is still employed in nautical charts.
Jodocus Hondius (Latinized version of his Dutch name: Joost de Hondt) (17 October 1563 – 12 February 1612) was a Flemish and Dutch engraver and cartographer.He is sometimes called Jodocus Hondius the Elder to distinguish him from his son Jodocus Hondius II.
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In the case of the Mercator projection, y'(φ) = R sec φ, so this gives us h = k and α = β. The fact that h = k is the isotropy of scale factors discussed above. The fact that α = β reflects another implication of the mapping being conformal, namely the fact that a sailing course of constant azimuth on the globe is mapped into the same ...