Editing Scale (ratio) (section)

==In maps==
{{main|Map scale}}
Map scales require careful discussion. A town plan may be constructed as an exact scale drawing, but for larger areas a [[map projection]] is necessary and no projection can represent the Earth's surface at a uniform scale. In general, the scale of a projection depends on position and direction. The variation of scale may be considerable in small scale maps which may cover the globe. In large scale maps of small areas, the variation of scale may be insignificant for most purposes, but it is always present. 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.)

{{Quote|text=A scale model is a representation or copy of an object that is larger or smaller than the actual size of the object being represented. Very often the scale model is smaller than the original and used as a guide to making the object in full size.|source=Unknown}}