Scale – this is a ratio and is shown as 1:50 000. The units may be in centimeters or inches. 18 Practical Work in Geography There are at least three ways in which this relationship can be expressed. How to convert map scales (convert to ratio scale) - YouTube SCALE. The reduction of an area is known as the scale of a map. Graphic map scale: Fractional map scale: The fractional method for portraying the scale of a map uses a representative fraction to describe the ratio between the map and the real world. Download the PDF Question Papers Free for off line practice and view the Solutions online. method called a universal method because of its usefulness on global scale. The minimization rate and the denominator of fraction are equal. The first choice on this dialog, “Absolute Scale”, is a representative fraction (figure 3). Handy calculators are available online. Representative Fraction, Graphical scale, Linear scale and Comparative scale, Statement scale all are various categories of scale. Delhi - 110058. 3. Representative Fraction: A method of scale of a map or plan expressed as a fraction showing the ratio between a unit distance on the map or plan, and the distance measured in the same units on the ground. 2. Ltd. Download books and chapters from book store. What are the major advantages of graphical method ? Create a line scale that uses your new mixed unit direct statement scale. Ltd. Download books and chapters from book store. Here, 1 cm map distance representing 1,00,000 cm ground distance. They are called small scale because the representative fraction is relatively small. SCALE CAN BE SHOWN ON A MAP IN THREE WAYS To convert an R.F. Representative Fraction (R.F. Common Length and Distance Conversions ; Length or Distance Converter 2 inches represents 4 miles. The graphical scale stands valid even when the map is reduced or enlarged. 1 cm represents = 50000 cm or 500 metres. Statement of Scale into R. F. Problem Convert the given Statement of Scale of 1 inch represents 4 miles into R. F. Solution The given Statement of Scale may … Why is the Representative Fraction method called a universal method ? English system use inch, yard, and mile in measurement. Click on the maps below to link to the exercises. Here such a scale means that one unit of measurment on the map is equal to 50000 of the same unit on the ground. It can be written in three ways, the verbal scale, the graphic scale, and the representative fraction (RF) or fractional scale. 232, Block C-3, Janakpuri, New Delhi, 4. R. F. : 1 : 200000 2. Convert the direct statement scale units to a create a mixed unit direct statement scale (km) 1cm = 1 km 3. is 1: 50000 and read the distance in km and metres. If the scale is 1:1600000, how many km is it? Distance and Direction on Maps. 1. Click here to get an answer to your question ️ Convert a representative fraction 1: 100,000 (into km) into a statement scale 1 cm represents = 1000000 ÷ 5 =200000. 1600000 X 5 = 800000 divided by 100000 = 80 km. 232, Block C-3, Janakpuri, New Delhi, To effectively use maps you need to convert measurements from map units to ground units. What is statement of scale ? Representative Fraction (R.F.) Denominator is variable. 1 cm represents = 50000 cm or 500 metres. As with representative fractions, verbal scales are often used on large-scale maps and planning documents, most frequently used by civil engineers. At a map scale of 1:100000, 1 kilometer on the ground is equivalent to 1 millimeter on the map. (iii) It gives correct idea about distance. In order to convert the direct statement 1 em to 2.5 km into a represen­ tative fraction, you would use the following process: l em= 2.5 km Which one of the following methods of scale is a universal method ? (no drawing work only, explaining their meanings.) This can be shown as 1:50, 000 or 1/50, 000. (ii) It requires little time to express this scale. …to a Direct Statement Scale 1. Convert the given Statement of Scale into Representative Fraction (R. F.). Convert the given Statement of Scale into Representative Fraction (R.F.) 1: 31680 (into furlongs). 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:. Linear Scale. into Statement of Scale in the system of measurement shown in parentheses. Eg. (i) This is very simple method which is understood even by a common man. 1: 50,000 (into metres) It means that one unit on the map represents 50 000 of the same units on the Earth’s surface. Delhi - 110058. Convert the given Representative Fraction (R. F.) into Statement of Scale in the System of Measurement shown in parentheses: 1 : 100,000 (into km) 1 : 31680 (into furlongs) 1 … Here are several examples: Scale Finder (Nigel James, Bodleian Library, Map Room). 2. For example, one centimeter on the map equals 100,000 centimeters, or one kilometer, on the Earth. carries no units (inches, centimeters, etc. into Statement of Scale in the system of measurement shown in parentheses. Large-scale maps show smaller areas in more detail, such as county maps or town plans might. : 1. For example, to convert the R.F. Scale Conversion: 02. 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. Representative Fraction (R.F.) These are: 1. Some standard map scales already have the verbal scales calculated and you could easily use that. Glossary not to be republished ©NCERT. Convert the representative fraction or ratio to a direct statement 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. Here's an example: Tillsonburg, ON to Toronto, ON is 5 cm apart. Scale, Scale Conversion. 1" represents 2 miles.4. Maps represent areas and features, but not at their actual size. 1:100000 (into km). scales can be compared between different maps. Convert the given Statement of Scale into Representative Fraction (R.F.) 2020 Zigya Technology Labs Pvt. Convert the following representative fractions into a word statement: (3 points) Express the scale of a large-scale map with an RF of 1:15,000 (1 inch to x feet). 2. Fractions scale shows, in how many pieces a piece minimized. Question 3(i) 5 cm represents 10 km Answer: Representative Fraction Distance on Map = 5 cm Distance on Ground = 10 km Representative Fraction = $$\frac{5}{10}$$ = $$\frac{1}{2}$$ km or 2,00,000 Therefore representative fraction = 1 : 2,00,000 cm. 1 inch represents 1 yard. 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 2020 Zigya Technology Labs Pvt. 1cm = 100,000 cm 2. : Give one example each of statement of scale in Metric and English system. ): An R.F. 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. A statement of scale used as an example is 1:100,000, which means that every one unit on the map corresponds to 100,000 units on the Earth. Key Terms: 01. is 1:50 000 then 1 cm on the map represents 50 000 cm on the Earth’s surface. Converting a Direct Statement Scale to an RF Scale To convert from a direct statement scale back to an RF scale, multiply the right side of the equation by 100 000, to change kilometres into centimetres. You will find them on some smaller scale maps but not as often as you will representative fractions. To insert an RF on your map, click Insert on the top bar menu, then select Scale Text. Such maps are called large scale because the representative fraction is relatively large. A word statement that states the conversion of base units and is also a description of a map distance 3. And for a small-scale map with an RF of 1:225,000 (1 inch to x miles) 2. Convert the given Representative Fraction (R.F.) To convert a Representative Fraction scale to a direct statement scale, divide the denominator by 100000, to change centimetres into kilometres. Download the PDF Question Papers Free for off line practice and view the Solutions online. The numerator in fractions scale is stable as 1. (ii) When a map is reduced or enlarged from the original, the scale does not remain the same. 1:50000 can be shown as 1/50000 as well. What are the two different systems of measurement ? (i) It can be understood only by those who are familiar with the unit of measurement used. It can be used in all countries and also termed as International Scale. A large scale map covers a small area while a small scale map covers a large area. The verbal scale is a simple statement of the scale such as one inch equals one mile or 1" = 1 mile Representative Fraction Scale: 05. 3. As 1 km= 1,00,000 cm. Do the same for a medium-scale map with an RF of 1:75,000 (1 inch to x miles). According to Science Encyclopedia, a statement of scale may also use a verbal relationship rather than a numeric ratio. 1 cm represents = 1000000 ÷ 5 =200000. © Each map is at a different scale and expresses the scale in a different form: bar scale, statement of equivalency and representative fraction.Before you start the exercises you can click on the buttons below to review the concept of scale, how to convert units, convert fractions to decimals and/or use a protractor. For example, a map may show a … A ratio or representative fraction using ratios to measure and calculate distances 2. 1. Line Scale (Linear Scale) CONVERSION OF SCALE If you have carefully read the advantages and limitations of the different methods of scale, then it will not be difficult for you to convert the Statement of Scale into Representative Fraction and vice-versa. In Representative Fraction (R.F) values are represented in ratio format. 5 cm represent 10 km. https://www.zigya.com/share/R0VFTjExMDA0MTU5. Direct Statement Scale: 04. 1 cm represents 100 metres. 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." RF - Representative Fraction Scale of the map, A (cm) - actual distance - a number of centimetres on the ground surface, represented by 1 centimetre (1 cm) on a map, B (km) - value of one small incriment of a Bar Scale, C (cm) - length of the "B" incriment measured on a Bar Scale. Scale: 03. Scale tells the size relationship between the map or model and the real earth. Give its advantages and disadvantages ? ), it means that the R.F. 1. If the R.F. Construct a graphical scale when the given R.F. Because an R.F. 5 cm represents = 10 km or 1000000 cm. https://www.zigya.com/share/R0VFTjExMDA0MTQ3. © 5 cm represents = 10 km or 1000000 cm. 1:126,720 (into miles) 4. Scale Length Area Description Micro: 1 m – 1 km: 1 m 2 – 1 km 2: local Meso: 1 km - 100 km: 1 km 2 - 10,000 km 2: regional Macro: 100 km - 10,000 km: 10,000 km 2 - 100,000,000 km 2: continental Mega > 10,000 km > 100,000,000 km 2: global For instance, in physics an object or phenomenon can be called microscopic if too small to be visible. Question 3(ii). Convert linear scales to representative fractions and vice-versa. Correct answer to the question: Reading and using statement of scale, scale and scale shown by representative fraction method. Map distance in a scale is also known as : Convert the given Representative Fraction (R.F.) The representative fraction for the map is shown along the top bar menu in ArcMap. Other scale types - click on each phrase to go to the detailed glossary entry. The numerator signifies the length on map and the denominator signifies the length on terrain. This provides the representative fraction. 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