RF stands for Representative Fraction and used in maps to indicate the scale of the map.
Map scale is a statement of a measure on the map and the
equivalent measure on the Earth’s surface. To show a portion of
the Earth’s surface on a map, the area must be reduced.
Map scale, or the extent of reduction, is expressed as a ratio. The
number on the left indicates distance on the map; the number on
the right indicates distance on the ground. The following three
statements show the same scale:
1 inch = 2,000 feet
1 inch = 24,000 inch
1:24,000
The later is known as a representative fraction (RF) because
the amounts on either side of the colon are equivalent; that is,
1:24,000 means 1 inch equals 24,000 inch or 2000 feet
2006-07-30 21:50:56
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answer #1
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answered by Lutfor 3
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the scales are given to us in the form of (eg) cm into km but in RF (ratio formula) we have our measurements in cm:cm
and it always in its lowest form and it is always i centimeters(cm) not in any other unit.
foe example..
what is the RF of the scale..
4cm to 40km
so 40 km into cm
40* 1000
40000
4cm :40000cm
now u want the lowest form
40000/4
=10000
ur RF is 1:10000
u never write the units in a RF.
2006-07-29 08:36:23
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answer #2
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answered by Anonymous
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It is the scale in fractions. i think it stands for Ratio Formula. e.g. 1/100
2006-07-29 02:00:44
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answer #3
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answered by S'pore Student 1
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