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Globes%20and%20Maps%20SOL%20WG.1c

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Title: Tools Geographers Use Author: Arram Dreyer Last modified by: Arram Dreyer Created Date: 7/31/2006 8:31:50 PM Document presentation format: On-screen Show – PowerPoint PPT presentation

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Title: Globes%20and%20Maps%20SOL%20WG.1c


1
Globes and Maps SOL WG.1c
2
Globes
  • Globes are three dimensional representations of
    the earth

3
Advantages of Globes
  • Globes are more accurate than maps
  • Globes are not distorted

4
Disadvantages of Globes
  • Globes are not portable
  • Globes do not show detail
  • Globes are more expensive than maps
  • There are no thematic globes

5
Maps
  • Maps are two dimensional representations of the
    earth

6
Advantages of Maps
  • Maps are cheaper than globes
  • Maps show detail
  • Maps can show themes (thematic maps) and be used
    for comparing things
  • Maps can be put into a book called an atlas
  • Maps are portable

7
Disadvantages of Maps
  • Maps are distorted because the earth is not flat
  • Maps can distort shape, area, direction, and
    distance
  • This problem is somewhat solved by different map
    projections

8
Map Projections
  • Map projections are a way to draw maps in order
    to lessen distortion. There are different types
    of projections because people use maps for
    different reasons.

9
Mercator
10
Mercator
  • The Mercator is used by ship navigators
  • How do you identify it?
  • It is square
  • The latitude and longitude lines are at right
    angles
  • The top and bottom of the map are heavily
    distorted (Greenland is ginormous!)

11
Polar
12
Polar
  • The Polar projection is used by airline pilots
    because it shows the shortest distance between
    two points
  • How do you identify it?
  • It is a circle
  • It only shows one hemisphere
  • The latitude lines are circles
  • The longitude lines radiate from the center

13
Robinson
14
Robinson
  • The Robinson projection is used to compare data.
  • How do you identify it?
  • It has curved sides
  • The longitude lines curve towards the north and
    south pole

15
Different Types of Maps
  • Political Maps
  • Physical Maps
  • Topographic Maps
  • Thematic Maps
  • Cartograms

16
Political Maps
  • Political maps show man-made features such as
    cities, states, provinces, territories, or
    countries (Page 21)

17
Physical Maps
  • Physical maps help you see the type of landforms
    and bodies of water in a specific area (Page 20)

18
Thematic Maps
  • Thematic maps show specific types of information.
    Here are some examples of thematic maps
  • Qualitative maps
  • Cartograms
  • Flow line maps

19
Thematic Maps
  • Other types of thematic maps
  • Population distribution and density
  • Economic activity
  • Resource
  • Language
  • Ethnicity

20
Thematic Maps
  • Other types of thematic maps
  • Climate
  • Precipitation
  • Vegetation

21
Small Scale Maps
  • Maps can be large or small scale
  • A small scale map shows a large area but without
    much detail.
  • A small scale is used to see relative location in
    a region or between regions

22
Large Scale Maps
  • A large scale map shows a small area with much
    more detail
  • A large scale is used to see relative location
    within a region
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