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Map Projections Mayhem

Published on Nov 24, 2015

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PRESENTATION OUTLINE

MAP PROJECTIONS MAYHEM

7TH GRADE SCIENCE PROJECT

What is a map projection?

A map projection is a way of transferring the features of the earth onto a flat surface.

Define the 3 types of map projections.

Cylindrical

A cylindrical projection is a map projection in which the surface features of a globe are depicted as if projected onto a cylinder.

Cylindrical Pros and Cons:

Pro: Accurately shows continent shape

Con: Makes it easier to navigate oceans because distances can be calulated as straight lines.

Conic

A conic projection is a map projection based on the concept of projecting the earth's surface on a conical surface.

Conic Pros and Cons:

Pro: Very little distortion in continent size

Con: Only one hemisphere can be shown.

Equal-area

An equal-area projection is a projection in which regions on the earth's surface that are of equal area are represented as equal.

Equal-Area Pros and Cons:

Pro: Continents are accurately shown

Con: Slight distortion occurs in the edges.

WHO USES THEM?

  • Cylindrical: Sailor
  • Conic: Meteorologist
  • Equal-Area: Explorers