Maps aren't just useful for directions, they can also help you determine the distance between two (or more) places.
Time Required: 5 minutes
- Find the scale for the map you're going to use - it might be a ruler-looking bar scale or a written scale, in words or numbers.
- Use a ruler to measure the distance between the two places. If the line is quite cureved, use a string to determine the distance and then measure the string.
- If the scale is a representative fraction (and looks like 1/100,000 or 1:100,000), multiply the distance of the ruler by the denominator, giving distance in the ruler units.
- If the scale is a word statement (i.e. "One centimeter equals one kilometer") then determine the distance.
- For a graphic scale, you'll need to measure the graphic and divide the scale into the measured units on the ruler.
- Convert your units of measurement into the most convenient units for you (i.e. convert 63,360 inches to one mile)
- Watch out for maps that have been reproduced and have had their scale changed. A graphic scale will change with the reduction or enlargement but the other scales become wrong.
What You Need