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  2. World Map 1:2,500,000 - Wikipedia

    en.wikipedia.org/wiki/World_Map_1:2,500,000

    The production of a 1:2,500,000 scale map of the world had been discussed since the late 1940's, partly because many cartographers were dissatisfied with the work on the International Map of the World (or Millionth Map, after its scale of 1:1,000,000).

  3. Scale (map) - Wikipedia

    en.wikipedia.org/wiki/Scale_(map)

    A graphical or bar scale. A map would also usually give its scale numerically ("1:50,000", for instance, means that one cm on the map represents 50,000cm of real space, which is 500 meters) A bar scale with the nominal scale expressed as "1:600 000", meaning 1 cm on the map corresponds to 600,000 cm=6 km on the ground.

  4. Map series - Wikipedia

    en.wikipedia.org/wiki/Map_series

    In most European countries, the largest scale topographic map series is a 1:25.000 scale series. Notable exceptions are Austria (1:50,000) and Finland (1:20,000). Many non-European states limit the largest scale of their map series, usually to 1:50,000 scale, frequently due to the large size of the country covered (and hence for financial reasons).

  5. Ordnance Survey - Wikipedia

    en.wikipedia.org/wiki/Ordnance_Survey

    The metric national grid reference system was launched and a 1:25000-scale series of maps was introduced. The one-inch maps continued to be produced until the 1970s, when they were superseded by the 1:50000-scale series – as proposed by William Roy more than two centuries earlier.

  6. List of map projections - Wikipedia

    en.wikipedia.org/wiki/List_of_map_projections

    Meridians are parabolas. Standard parallels at 36°46′N/S; parallels are unequal in spacing and scale; 2:1 aspect. 1949 McBryde–Thomas flat-pole quartic = McBryde–Thomas #4: Pseudocylindrical Equal-area Felix W. McBryde, Paul Thomas Standard parallels at 33°45′N/S; parallels are unequal in spacing and scale; meridians are fourth-order ...

  7. National Topographic System - Wikipedia

    en.wikipedia.org/wiki/National_Topographic_System

    Each of these 1:50,000 sheets, in turn, was at one time split into eight 1:25,000 scale map sub-sheets, lettered as lower-case a to h, using the same boustrophedon pattern as the smaller-scale map areas and sheets. These 1:25,000 scale maps were produced from the 1960s to about 1975, then abandoned, and liquidated in the 1980s (along with the ...

  8. Scale (geography) - Wikipedia

    en.wikipedia.org/wiki/Scale_(geography)

    Cartographic scale or map scale: a large-scale map covers a smaller area but embodies more detail, while a small-scale map covers a larger area with less detail. Operational scale: the spatial extent at which a particular phenomenon operates. E.g. orogeny operates at a much larger scale than the formation of a river pothole does.

  9. Linear scale - Wikipedia

    en.wikipedia.org/wiki/Linear_scale

    The length of the line on the linear scale is equal to the distance represented on the earth multiplied by the map or chart's scale. In most projections, scale varies with latitude, so on small scale maps, covering large areas and a wide range of latitudes, the linear scale must show the scale for the range of latitudes covered by the map. One ...