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Topographic Maps. Topographic Map : A contour map -. Complicated Topographic Map. Simple Topographic Map. I am standing where the land meets the water, what is this called?. *All elevations are relative to sea level. 0 meter contour line. 0 meter contour line. Profile View of Island. - PowerPoint PPT Presentation
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Topographic Maps
• Topographic Map:–A contour map -
Complicated Topographic Map
Simple Topographic Map
I am standing where the land
meets the water, what is
this called?
*All elevations are relative to sea level
0 meter contour line
0 meter contour line
Profile View of Island
Sea Level 0 meters
Sea Level rises 5 meters during the night
Sea level Rises another 5 meters
Black paint
Profile View of Island
0 meters
Sea Level Rises another 5 metersA total of 15 meters
0 meters
5 meters
10 meters
15 meters
How would the island look from the Helicopter with the black lines?
15 m
0 m
10 m5 m
What are the values for the lines?
Top View of the Island
Contour Line Features
Which side of the island is steeper?
NS
15 m
0 m
10 m5 m
What do you notice about the contour lines?
North
South
Gradient:• Steep --• Gentle --
Gentle
Steep
15 m
0 m
10 m5 m
What is the elevation difference between the two locations?
Contour interval –
AB
5
15 m
0 m
10 m5 m
What is the value of each location?
C
A
E
D
B
Location ABCDE
Elevation_____
Reading Topographic Maps
How to use a map scale
15 m
0 m
10 m5 m
1 KM
Map ScalesEx: 1:24,000
One unit on the map equals 24,000 units on Earth’s surface
What about 1:100,000?
Reading Topographic Maps
• Contour lines are not all labeled
Index contour -
Intermediate contour –
What is the contour interval on this map?
Concentric circular contour lines represent a hill or
mountain
Depression --
Benchmark • __
River or Streams
What direction do rivers flow?
*-*
What do you notice about the shape of the contour lines on this
map?
• “V” pattern contours show a river or stream valley. • “V” -
Rivers flow downhill
Which direction is the river flowing?
EW
N
S
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