The representative fraction (RF) is commonly stated as a ratio of two numbers separated by a colon. RATIO or REPRESENTATIVE SCALE A ratio or representative fraction (RF) indicates how many units on the earth's surface is equal to one unit on the map. At a map scale of 1:100000, 1 kilometer on the ground is equivalent to 1 millimeter on the map. ), it means that the R.F. [2] Graphic scale. Calculate ground distance given map scale and map distance. All but the first options are verbal scales – choose the one that will make the most sense to your map readers. An RF is a ratio and is shown as follows: 1:50 000. Statement of a scale describes in words the distance on the map, and it's equivalent distance on Earth's surface. carries no units (inches, centimeters, etc. This RF scale means that 1 unit on the map represents 50 000 of the same units on Earth's surface. These formats are the representative fraction, the verbal statement, the graphic or bar scale, and the area scale. The most common are: 1. This type of scale representation visually looks very similar to representative fraction (RF). ): An R.F. For example, scale that has a RF of 1:100 means that every one unit on the map equals one hundred of the same units on the ground. 1 inch (in) = 2.54 centimeters 1 centimeter (cm) = 0.39 inch 1 foot (ft) = 12 inches = 30.5 centimeters = 0.3 meter 1 yard (yd) = 36 inches = 3 feet = 91.44 centimeters = 0.9 meter equals 1,000,000 cm. C. Representative Fraction (RF) or Natural Scale: 1:1,000,000 (this is the same as 1/1,000,000) The RF says that 1 of any measurement on the map equals 1 million of the same measurement on the original surface; for the example above 1-foot equals 1 million feet or 1 cm. The scale ratio is always written as one unit on the photo or map to the corresponding number of units on the ground. For example, a map where one unit (centimeter, meter, inch, kilometer, etc.) Representative Fraction. The actual printed map coordinates for the equirectangular cylindrical projection are The representative fraction 1:100,000, for example, means that a section of road that measures 1 unit in length on a map stands for a section of road on the ground that is 100,000 units long. The RF is always written with the map distance as … It can be expressed as 1/100,000 or 1:100,000. Eg: 1: 50000 means 1 cm on the map is 50000 cms on actual ground. In representative fraction (RF), the scale on the map is expressed in the numerical fraction. 2. Representative fraction (RF) or natural scale 1:1,000,000 (this is the same as 1/1,000,000) The RF says that 1 of any measurement on the map equals 1 million of the same measurement on the original surface; for the example above 1 foot equals 1 million feet or 1 cm. ), also known as scale ratios, relate the size … The notes below highlight key points which are not explicitly stated on slides. 3.2.1 Representative fraction. 2. Topic: Example of Map Scale – Representative Fraction Fall 2020 Geog 104 1 Instructions: Online instruction provides challenges in delivering lecture material.The additional explanatory text below adapts lecture slides for online viewing. If the scale is a representative fraction (and looks like 1/100,000), multiply the distance of the ruler by the denominator (100,000 in this case), which denotes distance in the ruler units. For example, a scale of one inch to a furlong (1:7920) ... To avoid confusion in the use of the word 'scale' this constant scale fraction is called the representative fraction (RF) of the printed map and it is to be identified with the ratio printed on the map. 1:50,000 means 1 unit on map represents 50,000 units on ground. The units will be listed on the map, such as 1 inch or 1 centimeter. Scale bars are graphical representations of distance on a map. For example, the graphic scale might show a scale marked of in 1 cm units but labels them each as 10 km, 20 km etc. Converting Between Scale Types of Historic and Modern Maps, page 3 Converting Representative Fraction (RF)/Ratio Scale to Lexical Scale English and Metric Measures of Length to use:. These are representative fraction, scale statement and graphic or bar scale. Even people who live in foreign countries can find the distance on the map even if they are not familiar with the units of measurements of that country. SCALE Scale. A representative fraction, or RF, shows the relationship between one of any unit on the map and one of the same unit on the ground. Representative Fraction (RF) Scale The third method for showing scale is the representative fraction scale. Scale can be stated in three ways. The advantage of this distinction between varying scale on the super map and a constant RF is that for the former we can analyse scale variation around a value of unity. Construct a graphical scale for representative fraction 1:50,000 in which distance is given in furlongs and miles. It can be written in three ways, the verbal scale, the graphic scale, and the representative fraction (RF) or fractional scale. This type of description of a map's scale is called a representative fraction. C) A Representative Fraction Scale removes the units and shows the direct relationship between the two measurements. A simple ratio or fraction, known as the representative fraction. Map scale is the proportion between a distance on a map and a corresponding distance on the ground: (D m / D g). Representative fraction scale (RF): Two other terms refer to the representative fraction scale - the fractional scale and the RF scale which is the scale ratio written in fractional form, 1/20,000. It is represented in ratio, which we call Representative Fraction. - Scale is a fraction, expressed in 3 ways: - Representative Fraction (RF), e.g. The three ways of stating scale are the verbal scale, the graphic scale, and the representative fraction. Representative fraction and scale bars from a United States Geological Survey (USGS) topographic map. a representative fraction of the total sample that is to be analyzed in the individual laboratories. Representative fraction. (no drawing work only, explaining their meanings.) Because an R.F. By convention, the proportion is expressed as a "representative fraction" in which map distance (D m) is reduced to 1. scale is a ratio, or fraction, that expresses the mathematical relationship between MAP and LAND, such as 1 : 24,000. which means "1 map unit is equivalent to 24,000 land units." Representative Fraction (R.F. equals 1 million cm. The verbal scaleis a simple statement of the scale such as one inch equals one mile or 1" = 1 mile.The unit on the map should be appropriate to the dimensions of the map. Verbal Scale Correct answers: 1 question: Reading and using statement of scale, scale and scale shown by representative fraction method. REPRESENTATIVE FRACTION (R.F.) This is preferable to the analysis of variations about fractions such as 1/10,000 or 1:10M (million). Most people chose this as the best definition of representative-fraction: (cartography) The scale o... See the dictionary meaning, pronunciation, and sentence examples. This scale is usually written as a fraction and is called the representative fraction. Verbal and RF scales do not. Answer: For graphical scale, to know the length of the line we need to make following calculations. ... Representative Fraction (R.F.) Map scales are expressed in a variety of ways (RF, verbal, graphic). Graphic scale remains accurate if a map is enlarged or reduced. 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