Globe: three-dimensional model of the Earth’s surface. *A globe is the best model of Earth, because is correctly shows the shapes and sizes of features on Earth Map



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1.4 Notes

What Are Maps?

Objective: Explain why a globe is the most useful type of Earth map. Describe what happens when the round Earth is shown on a flat map

Globe: three-dimensional model of the Earth’s surface. *A globe is the best model of Earth, because is correctly shows the shapes and sizes of features on Earth

http://www.1worldglobes.com/images/globes/discovery-globe-thumb.jpg

Map: flat model of Earth’s surface. The earliest known maps are more than 4000 years old, and were carved on clay tablets. They were used to record property lines and help build roads, canals, and towns.

Distortion: error in shape, size, or distance. Almost all maps have distortions, because it is difficult to copy large areas onto smaller models http://www.worldpress.org/images/maps/world_600w.jpg

Things that maps show:

* Some show locations of and distances between places on Earth

* Others show city streets

* Some show buildings in town

* Some show weather or types of soil in an area

http://mitchelldeclerck.com/images/maps_example.jpg

1.5 Notes

What is a map projection?

Objective: Explain what a map projection is. Name the three kinds of map projections



Map Projection- Drawing of Earth’s surface, or part of it, on a flat surface

Map makers take a plastic globe with a light inside. They trace the outlines of the continents onto paper in order to make a flat map from a round globe



http://www.geog.soton.ac.uk/geo-refer/images/map%20projections%20microcam.gif

Types of Map Projections

Mercator- Named after Gerardus Mercator. It is made by wrapping a sheet of paper into a tube around a globe. Distortions are found around the poles and between land areas.

http://www.nationalatlas.gov/articles/mapping/images/2mercators.gif

Polar- Made by holding a flat sheet of paper on one pole of a globe. Distortions are found in areas away from the poleshttp://probaway.files.wordpress.com/2008/11/south_pole_projection.jpg

Conic- Made by shaping a sheet of paper into a cone and placing it over a globe. When several conic projections are put together, they are almost as accurate as a globe.

http://lh6.google.com/faizrious73/r8jsqi3rabi/aaaaaaaaaac/7csbzfq5fye/the%20three%20classes%20of%20map%20projections_thumb%5b3%5d


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