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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.
The scale of a map projection must be interpreted as a nominal scale. (The usage large and small in relation to map scales relates to their expressions as fractions. The fraction 1/10,000 used for a local map is much larger than the 1/100,000,000 used for a global map. There is no fixed dividing line between small and large scales.)
The scale: parameter specifies the desired map scale as 1:N, overriding the scale implied by any type: parameter. GeoHack uses scale: to select a map scale for a 72 dpi computer monitor. If no dim:, type:, or scale: parameters are provided, GeoHack uses its default scale of 1:300,000.
The number of qualifiers used in a map legend depends on the scale. [1] The WRB distinguishes three map scale levels: first map scale level: RSG only, second map scale level: the RSG plus the first applying principal qualifier, third map scale level: the RSG plus the first two applying principal qualifiers.
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).
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These efforts are known as "High Accuracy Reference Network" (HARN) or "High Precision GPS Network" (HPGN). In addition, the basic unit of distance used is sometimes feet and sometimes meters. Thus a fully described coordinate system often looks something like: "Washington State Plane North, NAD83 HARN, US Survey feet".
Bowditch defined only "bar scale" in its 1962 Glossary, [4] but added a reference to "graphic scale" by its 2002 edition. [5] Dutton used both terms in 1978. [2] The International Hydrographic Organization's Chart No. 1 uses only "linear scale". [6] The British Admiralty's Mariner's Handbook uses "scale" to describe a linear scale and avoids ...