The scale on a map or blueprint is a ratio. Ingredients sometimes need to be mixed using ratios such as the ratio of water to cement mix when making cement.
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The proportions of a map, model, or diagram match the proportions of the real object, scale models, maps, and diagrams can accurately communicate scientific knowledge.
It shows the distance a certain measurement equals on a map.
For models, 1:8 up to 1:800 ; for local charts, 1:25000 ; for state and regional maps, 1:500000.
A set of measurements is taken of a physical object or space, and the measurements uniformly reduced by a large factor, to create a model or chart in a smaller, more usable form. e.g. Scale models of buildings, terrain maps.
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