Vertical Exaggeration

Vertical Exaggeration for Topographis maps

1. Vertical ExaggerationVertical Exaggeration

3. How do you find the scales?How do you find the scales?
the vertical scale is the scale on the the vertical scale is the scale on the
vertical axis of the cross section. vertical axis of the cross section.
the horizontal scale is the scale of the map the horizontal scale is the scale of the map
the map from which the cross section was the map from which the cross section was
drawn. - both the VS and HS must use the drawn. - both the VS and HS must use the
same units, ie m's or km's. same units, ie m's or km's.

4. InquiryInquiry
1. Why use VE?1. Why use VE?
2. How do you calculate VE?2. How do you calculate VE?
3. How do you express the VE answer?3. How do you express the VE answer?
4. What does the number mean?4. What does the number mean?

7. How to calculate VE?How to calculate VE?
Interpret the vertical scale and find what Interpret the vertical scale and find what
one cm represents in metres eg 1/20one cm represents in metres eg 1/20
Find the map scale (this is called the Find the map scale (this is called the
horizontal scale) eg 1:100,000 and horizontal scale) eg 1:100,000 and
convert this into metres = 1/1000convert this into metres = 1/1000
VE = VS/HS, so, 1/20 divided by 1/1000VE = VS/HS, so, 1/20 divided by 1/1000
Invert the denominator (because to divide Invert the denominator (because to divide
fractions you invert then multiply) fractions you invert then multiply)
1/20 x 1000/1 = 501/20 x 1000/1 = 50

8. What does the answer mean?What does the answer mean?
To accurately interpret a cross-sectional profile To accurately interpret a cross-sectional profile
we need to determine how much exaggeration we need to determine how much exaggeration
has occurred. To do this we measure how much has occurred. To do this we measure how much
the vertical axis has been exaggerated the vertical axis has been exaggerated
compared with its actual shape. This is called compared with its actual shape. This is called
vertical exaggeration. vertical exaggeration.
It means that the cross sectional profile has It means that the cross sectional profile has
been exaggerated 50 times. This allows been exaggerated 50 times. This allows
Geographers to see a side on Profile of the key Geographers to see a side on Profile of the key
cultural and natural features from a map.cultural and natural features from a map.

9. Create a question on VE and test Create a question on VE and test
another studentanother student
Make sure you have the right answer Make sure you have the right answer
before you test thembefore you test them