map scale - wordpress.com · map scale the scale of a map is the ratio of a distance on the map to...
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November 17, 2014
Map Scale
The scale of a map is the ratio of a distance on the map to the corresponding distance on the ground.
1 : 100 000 000
or 1cm on the map is equal to 100 000 000cm on land
A town plan might be on a scale of 1:10,000 A world map might be on a scale of 1:100,000,000.
November 17, 2014
What is Map Scale?
If 2cm on a map ...
represents 1 km on the ground ...
the scale would be 2 cm = 1 km
November 17, 2014
*Obviously, maps aren't life-sized....otherwise we'd never be able to
fit them in our backpacks!
*Instead, cartographers plot maps on a ratio scale, where one
measurement on the map equals another larger amount in the
real world.
*The first number of the scale is always one. It's your unit of measurement, usually a centimeter.
The second number is the ground distance.
Map Scale
November 17, 2014
Map Scale
Some maps have a bar scales
November 17, 2014
Map Scale
Your smaller scale, or your 'distance on paper' always goes on top.
Your larger scale, or your actual distance, always goes on the bottom.
1100 000
1 cm on paper
actual distance
November 17, 2014
Map scales may be expressed in words, as a ratio, or as a fraction. Example;* 'one centimetre to one hundred metres' or 1:10,000 or 1/10,000
* 'one inch to one mile' or 1:63,360 or 1/63,360
* 'one centimetre to one thousand kilometres' or 1:100,000,000 or 1/100,000,000. (The ratio would usually be abbreviated to 1:100M
Representation of scale
November 17, 2014
ClassificationRange Examples
large scale1:0 – 1:600,000 1:0.00001 for map of virus;
1:5,000 for walking map of town
medium scale1:600,000 – 1:2,000,000
Map of a country
small scale1:2,000,000 – 1:∞ 1:50,000,000 for world map;
1:1021 for map of galaxy
November 17, 2014
Scale
On a map with a scale of 1:100 000, what actual distance in kilometers, is represented by 5cm?
1 cm = 5 cm100 000 cm x cm 500 000 cm 5 km
How do you convert cm to km?
November 17, 2014
Brandon is approximately 200km away from Winnipeg. How far apart are they on a map with a scale of 1:20 000 000?
1 = x 20 000 000 200 km
x = 0.00001 km
x = 1 cm apart on the map
Map Scale
November 17, 2014
Map Scale
Calgary and Edmonton are 277 km apart. On a map with a scale of 1: 20 000 000, how many centimeters would this be?
1 cm = x20 000 000 277 km
x
x = 0.00001385 km
x = 1.4 cm on the map
November 17, 2014
On a map with a scale of 1 : 50 000 000, what actual distance in kilometers is represented by 5 cm?
Map Scale
1 = 5 cm50 000 000 x
250 000 000 cm
2500 km