Topographic Maps
A topographic map is a 2 dimensional model of the Earth’s ___________
7. Contour lines which show a depression, crater, or sinkhole on a map.
-Shown by __________________ lines (hachure marks) on the
_____________ of a contour line.
-The elevation of the _________ depression contour is the _________
It shows surface features including;
-Natural features like ____________, lakes and ___________________
-Manmade features like cities, ___________, and bridges.
as the lowest regular contour near it.
-The lowest possible elevation of a depression is just _____________
the value of the _______ ___________ that is not shown
Contour lines
- represent _________________ (height in relationship to ______ level.)
-1 Contour line on a map connects points of ______________elevation.
Gradient
The ____________ between any two points on a hill
- Show elevation and ___________ of the land
•
Gradient =
Relief
-difference between ________________ & _______________ contour
lines on map
Use the topographic map below to answer the following questions.
Contour interval
-difference in ___________________between each line.
1.Contour interval = __________
2. Relief = ____________
3. Which hill has a depression at the top of it? ___________________
4. The highest mountain is _______________
5. Draw a red line up the part of the hill that is steepest and a blue line up
the hill where it is the most gradual gradient.
600
-MUST be ____________ value between any 2 lines.
What is the contour interval of the map on the right? ___
500
Index Contour
-Usually every 5th line is printed ______________________& has an
___________________printed on it.
Rules for Contours
33
1. Contour lines never ____________
2. Contours form ___________ ________ (even if not shown of the map.)
3. Contours bend ___________________(uphill) when crossing a stream,
forming a “____” or “____” in the map.
The “V” points _____hill.
4. The highest possible elevation of the hill is just __________ the value
of the _________ _________ that is not shown
5. Steeper Slope (Gradient) – contour lines are ___________ together.
6. Gradual/Gentle Slope (Gradient) –contour lines are __________ apart.
Draw the profile (side view) between points A & B below.
Elevation (m)
The innermost circle is the _______ of the hill.
60
40
20
0