Chapter 3, Section 2

Standards IE 1h. Read and Interpret maps.

Objective 1 Describe the characteristics and uses of three types of map projections.

Objective 2 Summarize how to use keys, legends, and scales to read maps.

Assessment End of Section Questions, Chapter Test

Review Daily Bellwork, Science Starters, Standards Practice

Key Terms

Create a flash card for the following key terms (p. 57 in textbook): Remote Sensing Map Projection Legend Scale

If you finish early, study your flash cards!

Maps

The Science of making maps is

called Cartography.

Maps• To make maps Cartographers

collect data using:–Field Surveys (actually walking

and drawing an area)–Remote Sensing (using satellite

images, airplanes)

Map Projections

• A map is a flat representation of Earth’s curved surface.

• To transfer the info on a spherical globe to a 2D map scientists make PROJECTIONS.

• 3 Types of Map Projections

Cylindrical

Azimuthal

Conic

Cylindrical Projections

• Imagine the globe was transparent and had a light inside…

• If you wrapped a cylinder (rectangular) paper around it and traced the continents = Cylindrical Projection Map

Azimuthal Projections

• Imagine the globe was transparent and had a light inside…

• If you placed a paper so that it touches the globe at only one point and then trace = Azimuthal Projection Map.

Conic Projections

• Imagine the globe was transparent and had a light inside…

• If you placed a paper in a cone shape over the top or bottom of the globe and traced the images= Conic Projection Map.

CylindricalAccurate near equatorParallels and Meridians form a gridShapes of small areas are accurate

Distorts near poles

AzimuthalLittle distortion at point of contact

Great Circles appear as straight lines (good for pilots)

Unequal spacing between parallels and meridians

Distances are inaccurate

ConicAreas where the cone and globe are in contact are accurate

A series of conic projections can increase accuracy

Areas where the cone is not touching the globe are distorted

Benefits

Negatives

Quick Check!1. 3 Types of Map projections are Cylindrical,

Azimuthal, and __________.2. Which map forms a grid and makes finding

locations easier? ________________3. Which projection is accurate at only one point

but makes navigation for pilots easy? ________________

4. Why is the globe the only completely accurate map? ________________________________________________________________________________

Reading a Map

• Compass Rose==shows the cardinal directions, North, East, South, West (generally North points upward. Note an actual compass points to Geomagnetic North)

• Parallels are side-to-side• Meridians are top to bottom• Use legend and scale to interpret symbols and

distance on a map

INTERACTIVE!

• Draw a quick map of where you live and the surrounding neighborhood.

• It does not need to be perfect! Don’t worry if you do not know all the street names.

• Don’t forge a compass rose and a legend!

Animated Maps

Brain Pop Maps

Assessment Answer Questions 2,3,4,6 on page 62.

Daily Quiz