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  2. Sunrise equation - Wikipedia

    en.wikipedia.org/wiki/Sunrise_equation

    A contour plot of the hours of daylight as a function of latitude and day of the year, using the most accurate models described in this article. It can be seen that the area of constant day and constant night reach up to the polar circles (here labeled "Anta. c." and "Arct. c."), which is a consequence of the earth's inclination.

  3. Wikipedia:Coordinate-referenced map templates - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Coordinate...

    Find the coordinates (generally latitude and longitude) of the geographic location you want to link; Select the template with the appropriate scale for the map to zoom into; Add the coordinates to the template using the template's format; Place the template reference into the article; Suggestions for accomplishing each step are below.

  4. List of map projections - Wikipedia

    en.wikipedia.org/wiki/List_of_map_projections

    Lines of constant bearing (rhumb lines) are straight, aiding navigation. Areas inflate with latitude, becoming so extreme that the map cannot show the poles. 2005 Web Mercator: Cylindrical Compromise Google: Variant of Mercator that ignores Earth's ellipticity for fast calculation, and clips latitudes to ~85.05° for square presentation. De ...

  5. Equirectangular projection - Wikipedia

    en.wikipedia.org/wiki/Equirectangular_projection

    Equirectangular projection of the world; the standard parallel is the equator (plate carrée projection). Equirectangular projection with Tissot's indicatrix of deformation and with the standard parallels lying on the equator True-colour satellite image of Earth in equirectangular projection Height map of planet Earth at 2km per pixel, including oceanic bathymetry information, normalized as 8 ...

  6. Spherical coordinate system - Wikipedia

    en.wikipedia.org/wiki/Spherical_coordinate_system

    To plot any dot from its spherical coordinates (r, θ, φ), where θ is inclination, the user would: move r units from the origin in the zenith reference direction (z-axis); then rotate by the amount of the azimuth angle (φ) about the origin from the designated azimuth reference direction, (i.e., either the x– or y–axis, see Definition ...

  7. Wikipedia:WikiProject Geographical coordinates - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:WikiProject...

    A latitude-longitude location sourced from data taken from the German-language Wikipedia would be tagged as "source:dewiki" – and so on, for other language codes; A location sourced from the public domain GeoNet Names Server database would be tagged as "source:GNS".

  8. Map projection - Wikipedia

    en.wikipedia.org/wiki/Map_projection

    This trait is useful when illustrating phenomena that depend on latitude, such as climate. Examples of pseudocylindrical projections include: Sinusoidal, which was the first pseudocylindrical projection developed. On the map, as in reality, the length of each parallel is proportional to the cosine of the latitude. [30] The area of any region is ...

  9. Local tangent plane coordinates - Wikipedia

    en.wikipedia.org/wiki/Local_tangent_plane...

    The east north up (ENU) local tangent plane is similar to NED, except for swapping 'down' for 'up' and x for y. Local tangent plane coordinates (LTP) are part of a spatial reference system based on the tangent plane defined by the local vertical direction and the Earth's axis of rotation.