Quick map scale Map

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Quick map scale Map

Quick map scale Map
• Geog 30 1 • Page 1 of 3 KEY All maps reduce the size of what they depict to fit information onto a map. We learned about three types of scale this week: fractional (ratio) , verbal (written) and graphic. This lab will give you practice using each of these scales. How to use fractional map scale to determine Earth distance: 1. Use a ruler to measure the distance on the map. This is your “map distance.” 2. Multiply the map distance by the denominator of the fractional scale, or “earth distance.” This will give you the distance of your map distance in real life using the units you used for your initial measurement. 3. Convert your map distance to a useful unit. Some useful conversions to remember: • Centimeters to meters, divide by 100 • Centimeters to kilometers, divide by 100,000 • Inches to feet, divide by 12 • Inches to miles, divide by 63,360 Exercises 1. On a map with a scale of 1:24,000, a measured distance of 1 in ch represents an actual distance of: ______ ft 2. On a map with a scale of 1:62,500, a measured distance of 4.5 inches represents an actual distance of: ______miles 3. On a map with a scale of 1:50,000, a measured distance of 7.5 centimeters represents an actu al distance of: _______km 4. Express a fractional scale of 1:100,000 as a verbal scale: One centimeter represents _____ kilometer(s). Map Scale • Geog 30 1 • Page 2 of 3 5. Question 5 is based on this set of graphic scales for a map with a fractional scale of 1:50,000: If a map with these graphic scales is enlarged along with the scales (such as by using a photocopy machine): a) Will the fractional scale of the map change? Why? b) Will the graphic scales still be usable? Why? 6. If a measured distance of 20 inches on a map d epicts an actual distance of 10 miles, what is the fractional scale of the map ? 7. A map has a fractional scale 1:100,000. Complete this scale as a verbal scale: One centimeter represents ________ kilometer(s) 8. Map 4 -1 on page 3 depicts Hawai’i. Use the gra phic scale to approximate the distance from “Patrol Cabin” at the summit of Mauna Loa to the “Rest House” northeast of the summit. _______miles _______kilometers 9. Reference Map 4 -2 on page 3. Use the graphic scale to determine the distance from “War Ridge ” to “River Ridge” _______miles _______kilometers • Geog 30 1 • Page 3 of 3 Map 4 -1 Map 4 -2

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