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MAP SCALE

MAP SCALE. Something you need to know. 100,000cm = 1km to switch from cm to km you divide by 100,000 to switch from km to cm you divide by 100,000. Map Scale - What is it?. shows the relationship between the distance on a map and the actual distance on the Earth’s surface

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MAP SCALE

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  1. MAP SCALE

  2. Something you need to know • 100,000cm = 1km • to switch from cm to km you divide by 100,000 • to switch from km to cm you divide by 100,000

  3. Map Scale - What is it? • shows the relationship between the distance on a map and the actual distance on the Earth’s surface • a small distance on a map represents a much larger distance on the Earth • there are 3 types of scale

  4. 1. DIRECT STATEMENT • uses words to describe the relationship between a distance on a map and a specific distance on the Earth’s surface

  5. 2. LINEAR SCALE • a special RULER on the map that is divided into equal units of distance • always includes the units of measurement on the Earth’s surface • using a piece of paper and pg 8 in COSA, how far is Edmonton from Calgary?

  6. 3. REPRESENTATIVE FRACTION • a ratio where one unit on the map equals a specific number of the same unit on the Earth’s surface • always done as a ratio or fraction of 1 • 1cm on the map equals 50,000cm on the Earth

  7. Example: Scale is 1:50,000 Town A is 10cm from Town B 1:50,000(10cm) = 500,000cm So Town A is 500,000cm (or 5km) from Town B

  8. SCALE CONVERSIONS R.F to Direct Statement • divide the second term by 100,000 to change cm to km Example: 1:50,000cm (R.F.) 1cm = 50,000cm/100,000 (CONVERSION) 1cm = 0.5km (DIRECT STATEMENT)

  9. Direct Statement to R.F. • Multiply the second term by 100,000 to change km to cm Example: 1cm:2.5km (DIRECT STATEMENT) 1cm = (2.5km)(100,000) (CONVERSION) 1cm = 250,000cm (R.F.)

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