7 6 5 4 3 2 1 0 MAPS Daniel R. Barnes initialized 4/4/2005.
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Transcript of 7 6 5 4 3 2 1 0 MAPS Daniel R. Barnes initialized 4/4/2005.
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MAPS
Daniel R. Barnesinitialized 4/4/2005
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Latitude = degrees away from the equator
High latitudes have cold climates
Low latitudes have hot, “tropical” climates
EQUATOR
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SWBAT . . .
. . . interpret topographic maps.
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On a Mercator projection, Greenland looks as wide as South America
This is a “Mercator projection”.
This one happens to be color coded by elevation
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These are more realistic relative sizes for Greenland and South America. Greenland’s not quite as wide as South America, is it? Look on a globe if you don’t believe me.
Greenland
South America
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Robinson projection: less polar distortion than a Mercator projection, but still
stretched a lot near the poles.
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Red lines are highways
What are the red lines?
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What’s this symbol?. An AIRPORT!
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What are all the squiggley lines curving all over the place?
contour lines
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What’s this?
and this? and this?
HILLTOPS or MOUNTAIN PEAKS
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Can you see the hash marks pointing inward?
Those marks point downhill, often toward a lake or a pond.
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X 15,735
This is a hilltop This is a pit.It might even be a volcanic crater.
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Pass out the TopographicMap Analysis Worksheet
1. The squiggly lines are called . . .
. . . contour lines
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TopographicMap Analysis Worksheet
2. The numbers found on some of the lines indicate . . .
. . . elevation
= altitude
= height above sea level
Note that the scale is in metric units, so the elevations are in meters.
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3. What does it mean when the lines are all close together?
. . . A steep slope, maybe even a cliff.
TopographicMap Analysis Worksheet
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4. What does it mean when the lines are spread far apart?
. . . A gentle slope, maybe even terrain you would call “flat”
TopographicMap Analysis Worksheet
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5. Where on the map do you think streams would flow during the rainy season or in the spring when snow melts?
. . . Look for the parallel “V’s” that point uphill.
TopographicMap Analysis Worksheet
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6. Where are the flat areas?
. . . wherever the lines are far apart
TopographicMap Analysis Worksheet
FLAT
FLAT
FLAT
FLAT
FLAT
FLAT
FLAT
FLAT
FLAT
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7. Where are the cliffs?
. . . wherever the lines are close together
TopographicMap Analysis Worksheet
FLAT
FLAT
FLAT
FLAT
FLAT
FLAT
FLAT
FLAT
FLAT
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9.2 cm
9.2 cm x 0.5km/cm =
9.2
x 0.5 0
1
4 6 .
km4.60
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x 0.5 km/cm =13 a. 6.4 cm km
6.4x 0.5
0
2
3 2.
3.20
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12,000 feet
-11,000 feet
1,000 feet
1,000 feet
5 lines
5)1000
= feet/line
2
1000
00
200
contour interval = 200 feet
11,200
11,400
11,600
11,800
12,200
12,400
10,800