Resolution can also be related to the scale. Scale refers to the ratio of distan

Question

Resolution can also be related to the scale. Scale refers to the ratio of distance on an image or map, to the actual ground distance. For example, if you had an image with a scale of 1:100,000, an object of 1cm length on the map would actually be an object 100,000cm (1km) long on the ground. In an image of the Olympic Village in London, England the Olympic pool length measures 2000 pixels and the pixel size is 5 micrometres. What is the scale of the Image? assume the pool is 50m .

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Explanation / Answer

Scale = measured length on map / original length

Here measured length of pool = 2000 pixels.

1 pixel = 5 micrometers = 5 X 10-6 m

Hence measured length of pool on map = 2000 X 5 X 10-6 m = 0.01 m

Actual length = 50m.

Scale = 0.01/50

Hence scale = 1/ 5000.

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