Map Scale: 1: Map Distance: Ground Distance Units: At a map scale of 1:100000, 1 millimeter on the map is equivalent to 1 kilometer on the ground. 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. - Scale is a fraction, expressed in 3 ways: - Representative Fraction (RF), e.g. The proportion, or ratio, is also typically expressed in the form 1 … ), also known as scale ratios, relate the size … Verbal and RF scales do not. Representative fraction and scale bars from a United States Geological Survey (USGS) topographic map. Construct a graphical scale for representative fraction 1:50,000 in which distance is given in furlongs and miles. Example 2 If a 5 cm long line in the drawing represents 3 km length of a road, then in engineering scale it is written as 1 cm = 600 m and in graphical scale … The notes below highlight key points which are not explicitly stated on slides. The graphic scale is sometimes called the bar scale, and the representative fraction is the RF or the fractional scale. 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. carries no units (inches, centimeters, etc. This topographic map has an RF of 1:24,000, which means that one unit on the map represents 24,000 units on the ground. A verbal scale is inserted the same way as a representative fraction – click on Insert on the top bar menu and select Scale Text (figure 2). It is represented in ratio, which we call Representative Fraction. In representative fraction (RF), the scale on the map is expressed in the numerical fraction. The scale ratio is always written as one unit on the photo or map to the corresponding number of units on the ground. (no drawing work only, explaining their meanings.) The most common are: 1. 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. Scale bars are graphical representations of distance on a map. tells the size relationship between the map or model and the real earth.. For example, a map where one unit (centimeter, meter, inch, kilometer, etc.) Graphic scale remains accurate if a map is enlarged or reduced. Representative Fraction (R.F. 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." These are representative fraction, scale statement and graphic or bar scale. The actual printed map coordinates for the equirectangular cylindrical projection are Compared to the first two, it is the most abstract, but also the most versatile. Calculate ground distance given map scale and map distance. Scale can be stated in three ways. It can be written in three ways, the verbal scale, the graphic scale, and the representative fraction (RF) or fractional scale. Two of these different kinds of scale are shown on your map. Here such a scale means that one unit of measurment on the map is equal to 50000 of the same unit on the ground. 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. Such maps are called large scale because the representative fraction is relatively large. Other scale variations are sometimes used in addition to the standard forms. The units will be listed on the map, such as 1 inch or 1 centimeter. equals 1 million cm. Eg: 1: 50000 means 1 cm on the map is 50000 cms on actual ground. For example: The third type of scale is a representative fraction, or ratio scale. 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. Its advantage is that it has universal application. A map scale can be printed in a variety of ways. By convention, the proportion is expressed as a "representative fraction" in which map distance (D m) is reduced to 1. 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. All but the first options are verbal scales – choose the one that will make the most sense to your map readers. It can be expressed as 1/100,000 or 1:100,000. The three ways of stating scale are the verbal scale, the graphic scale, and the representative fraction. 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. 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. This RF scale means that 1 unit on the map represents 50 000 of the same units on Earth's surface. Representative fraction. INTRODUCTION TO UNIT CONVERSION & SCALE PROBLEMS Representative Fraction (RF) When looking at a paper map, probably the most important thing to bear in mind is the map scale. Example sentences with "representative fraction", translation memory. C) A Representative Fraction Scale removes the units and shows the direct relationship between the two measurements. These formats are the representative fraction, the verbal statement, the graphic or bar scale, and the area scale. (It could also be shown as l/50 000, but this form is not as common.) Answer: For graphical scale, to know the length of the line we need to make following calculations. It may be expressed in various ways. At a map scale of 1:100000, 1 kilometer on the ground is equivalent to 1 millimeter on the map. Map scales are expressed in a variety of ways (RF, verbal, graphic). Representative fractions (R.F. Because an R.F. A simple ratio or fraction, known as the representative fraction. It can be used in all countries and also termed as International Scale. Representative Fraction (RF) - Fractional Scale - Ratio Scale: 1:50000 represents the map scale as a mathematical ratio or fraction, thus the name ratio scale or fractional scale. ), it means that the R.F. This type of description of a map's scale is called a representative fraction. REPRESENTATIVE FRACTION (R.F.) An RF is a ratio and is shown as follows: 1:50 000. The scale of a chart is the ratio of a given distance on the chart to the actual distance which it represents on the earth. 1:50,000 means 1 unit on map represents 50,000 units on ground. 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:. This type of scale representation visually looks very similar to representative fraction (RF). However, representative fraction avoids the use of units in detailing the scale of a map. 2. 3. 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. 1:50000 can be shown as 1/50000 as well. Map scale is the proportion between a distance on a map and a corresponding distance on the ground: (D m / D g). The scale represents the ratio of a distance on the map to the actual distance on the ground. 3.2.1 Representative fraction. method called a universal method because of its usefulness on global scale.  Graphic scale. SCALE Scale. 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. 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 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. This is preferable to the analysis of variations about fractions such as 1/10,000 or 1:10M (million). This fraction is called the representative fraction or simply "RF" in short. Representative Fraction. a representative fraction of the total sample that is to be analyzed in the individual laboratories. scales can be compared between different maps. The numerical scale of a map indicates the relationship of distance measured on a map and the corresponding distance on the ground. ... Representative Fraction (R.F.) 1:100,000 - Verbal Scale 'One cm represents one km' - Graphic Scale - a line labelled with the distance it represents. ): An R.F. 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. The representative fraction (RF) is commonly stated as a ratio of two numbers separated by a colon. Verbal Scale 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. Most people chose this as the best definition of representative-fraction: (cartography) The scale o... See the dictionary meaning, pronunciation, and sentence examples. Statement of a scale describes in words the distance on the map, and it's equivalent distance on Earth's surface. This scale is usually written as a fraction and is called the representative fraction. ... EurLex-2. Representative Fraction The expression of map scale as a mathematical ratio. Verbal map scale: A map scale that expresses the relationship between distance on the map and distance on the ground in words; for example, "One inch equals 10 miles." on the illustration represents 1,000,000 of these same units on the actual surface of the Earth would have a representative fraction of 1/1,000,000 (fraction) or 1:1,000,000 (ratio). Correct answers: 1 question: Reading and using statement of scale, scale and scale shown by representative fraction method. The RF is always written with the map distance as … equals 1,000,000 cm. 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. In this example, one centimeter on the map equals 100,000 centimeters (1 kilometer) on the earth. Representative fraction definition is - a map scale in which figures representing units (as centimeters, inches, or feet) are expressed in the form of the fraction 1/x (as 1/250,000) or of the ratio 1:x to indicate that one unit on the map represents x units (as 250,000 centimeters) on the earth's surface. For example, if we say that the scale of a map is 1 cm : 1 km, it would be understood by only that person who is familiar with the metric system of measurement.
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