Reduce 1:250,000 in to two times
Answers
Answer:
Grade 10 Geography201.3Map enLarGeMent anDreDuctionActivity 1.6Answer the following questions.1Enlarge the following map scales as indicated:a1: 50,000 (twice)b1: 100,000 (4 times)c1: 50,000,000 (5 times)d1: 10,000,000 (4 times)2A map with a scale of 1:400,000 is enlarged to 1: 100,000. How many times isthe scale increased?3Reduce the following map scales as indicated:a1: 250,000 (2 times)b1: 500,000 (5 times)c1: 800,000 (4 times)4A map with a scale of 1:25,000 is reduced to 1:75,000. How many times is thescale reduced?Methods of Map Enlargement and ReductionHow do we enlarge and reduce maps?ASquare method (free-hand)BPantograph method (uses an instrument)Figure 1.13is a map of a lake’s area drawn to a scale of 1: 20,000,000.How do we redraw this map to a scale of 1:10,000,000? In other words, how dowe double the original scale?AUsing Square MethodOn the basis of the given scale, you can enlarge or reduce the map by drawing asmany squares as needed. The squares should cover the whole map.For illustration refer toFigure 1.13.Exercise:Increase the map scale 1:20,000,000 twice.The steps involved are the following:1Find the size of the original map through measurement and make up yourmind about how big you want your new map to be. This will give you thescale of the new map that you want to construct.
Library