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Utility of numerical and graphic scales

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by

Cristina Paredes

on 6 June 2016

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Transcript of Utility of numerical and graphic scales

3.Utility of numerical and graphic scales
Maps
are representation of geographical space
They can be of local, national or global
scale
Maps
Representation of geographical space
Useful in the analysis of the geographical space and its components
Must include: title, scale, orientation or compass rose, symbology and geographic coordinates

Scale
Proportion in which reality is represented in a map
Can be
numerical
or
graphic
Can be local, national or global
Indicates the number of times a surface is augmented or reduced
Scale use allows the representation in maps of natural, social, economic, and politic elements
Numerical scale
Expressed as a ratio (razón) or a fraction.
1:50 000 - ratio
1/50 000 - fraction
The unit of measurement of the map , 1 cm, represents 50 000 cms, or 500 m of reality .
The scale is one to fifty thousand.
Graphic scale
Also named Linear Scale.
A line marked at intervals to show the distance on the earth or object which the distance on the scale represents.
The equivalence of a cm in the map with respect to reality.
Utility of scales in cartographic representation
Scales allow us to know and calculate real distances of the space we are analyzing.
Also, they bring us closer to particular elements and details.
Maps are the representation, done in paper, of the geographical space.
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