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Mapping to Scale.

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Presentation on theme: "Mapping to Scale."— Presentation transcript:

1 Mapping to Scale

2 All maps are created equivalent NOT equal

3 Small / Large scaled maps
Small scale maps have SMALL amounts of detail. (Map of the world) Large scale maps have LARGE amounts of detail. (Map of Merivale Rd and Viewmount Dr)

4 Large scale | Small Scale

5 How to calculate scale Direct Statement Scale
Describes the relationship between a distance on a map and a specific distance on the earth’s surface E.G. If you measure a distance of 1 cm on a map, the actual distance is 10 km. If 1cm=10km Then (3 x 1)km = (3 x 10)km Therefore, the actual distance between the two points is 30 km.

6 Line Scale See Text page 44

7 Representative Fraction Scale
Centimetres in Canada Inches in the U.S.A. 1: 50,000 1cm on the map represents 50,000 cm

8 Converting R.F. scale into a direct statement scale
Divide the denominator by 100,000 to change centimetres into kilometres IF 1cm = cm 1cm = ( / ) km 1 cm = 0.5 km or 1cm to 500m

9 Converting direct statement scale to R.F. scale
Multiply the denominator by 100,000 to change centimetres into kilometres IF 1cm = 2.5 km 1 cm = (2.5 * ) cm 1 cm = cm or 1:


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