The Web Mercator projection is used widely for online interactive maps. Despite discussions of the appropriateness of a simplified spherical approach or fundamental reservations against the Mercator projection in general, its broad availability for everyone gives it a great significance. For example, OpenStreetMap provides free geographical data which is typically accessed by means of map tile servers which rely on the Web Mercator projection. In this paper, starting with the mathematical derivation of spherical Mercator projections, the error introduced by identifying ellipsoidal and spherical coordinates is analyzed, the map tile disassembling is described in full detail and map applications are given.


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    Titel :

    Some Principles of Web Mercator Maps and their Computation


    Beteiligte:
    Sturm, Thomas (Autor:in)

    Erscheinungsdatum :

    2020



    Medientyp :

    Sonstige


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt




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