Discussion
Which one of the following map scales is a large scale ?
Answer: B
The representative fraction is large when the denominator is small, since a small denominator means each map unit stands for a smaller ground distance and so more detail. Among 1:250,000, 1:25,000, 1:500,000 and 1:50,000, the smallest denominator is 25,000, so 1:25,000 is the largest scale. The scale 1:500,000 is the smallest of the four. A large scale map covers a small area in great detail, while a small scale map shows a wide area with less detail, so a topographical sheet of 1:25,000 shows more than one of 1:250,000.
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