# Maps_

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```					Maps!
Globes
   A globe is a scale
model of the earth
   Since the earth is
round, a globe
presents the most
accurate depiction
of the earth.
   However, globes
show very little
geographic detail.
Maps
   A map is a symbolic representation
of all or part of the planet on a flat
surface.
   Unlike globes, maps can show small
areas in great detail.
   Another advantage is maps can be
folded and easily stored.
Planar Map Projections
   These show the earth centered in such a way that
a straight line coming from the center to any
other point representing the shortest distance.
   These maps are the most accurate at the center
and is often used for maps of the poles.
Cylindrical Projection Maps
   These maps are based
on the projection of
the globe onto a
cylinder.
   These are most
accurate at the
equator, but shapes
and distances are
distorted at the poles.
Conic Projection Maps
   A conic projection
comes from placing a
cone over part of a
globe.
   These are best suited
for showing limited
east-west areas that
are not too far from
the equator.
   Conic projections can
indicate distances and
directions accurately.
Robinson Projection Maps
   On these maps, the sizes and shapes near
the eastern and western edges of the map
are accurate, however the poles are
distorted.
Winkel Tripel Projection Maps
   Most general
reference maps are
these kind.
   These provide a
good balance
between the size
and shape of and
areas shown.
Goode’s Interrupted Equal-Area
Projection Maps

   These maps looks like a globe that has
been cut up and laid flat.
   These show the true size and shape of the
Earth’s landmasses, but distances are
distorted.
Mercator Projection
   These maps distort
size and distance as it
moves away from the
Equator.
   This makes Greenland
and Antarctica look
larger than they would
appear on a globe.
   They do accurately
show true directions
and shapes of land
masses, making them
useful for sea travel.
Physical Maps

   Physical maps show the location and the
shape of the Earth’s features.
   These maps use color or patterns to show
elevation, mountains, rivers, etc.
Great Circle Route
   The Earth has a
curve to it,
therefore the
shortest distance
between two place
is on a curve.
   To find the
shortest distance,
airline pilots use a
Great Circle Route.
Political Maps

   These maps show boundaries between
places.
   These maps also often show human-made
features such as capitals, cities, roads,
Special Purpose Maps
   These are maps that emphasize a single idea or specific kind of
   Some show:
•   Elevation (relief)
•   Climates
•   Population Density
•   Vegetation
•   Economic Activity
•   Natural Resources
Borders and
Boundaries-----
On political maps, boundary
lines highlight borders between
countries, states etc

Capitals
State and country capitals are
usually marked with a star

Compass Rose-
This is a marker that indicates
directions on the map

Map Key ------
Symbols represent info on the
map.
These are usually used on
political maps

Scale Bar------
Shows length in distance
in complete sentences using information
1.     What type of maps would be most useful for sailors going across the
ocean, and why?
2.     What type of map would be most useful for airline pilots trying to figure
out the shortest route between New York and Paris? Why this kind of
map?
3.     What kind of map is the most accurate near the equator, but is
distorted near the Poles?
4.     What kind of maps are the most accurate for looking at the poles?
5.     What kind of map is most widely used for normal maps?
6.     What kind of map shows the true size of the earth’s landmasses, but
distances are distorted?
7.     What is the purpose of map keys?
8.     What do physical maps show?
9.     What do political maps show?
10.    What are three different types of special purpose maps?

```
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 views: 10 posted: 3/24/2012 language: pages: 16