Exploring Map Projections, Summaries of Geography

transfer to flat maps. – Different projections are used to display different information, or even display power ... Gall-Peters Projection ...

Typology: Summaries

2022/2023

Uploaded on 02/28/2023

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Exploring Map Projections
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Exploring Map Projections

Warm-Up

  • What is the difference between these three

maps? What might explain the difference?

Distortions and Scale

  • No flat map is a perfect representation of the

Earth’s surface because of distortion and because they can not show each detail

  • Distortion - Certain areas are stretched out, or their shapes are changed
  • Scale – The relationship between the size of the map and the actual size of the area being shown

Mercator Projection

Gall-Peters Projection

Gall-Peters Projection

  • Equal Area Projection – Keeps size, but distorts shape
  • Remade in 1967 by Arno Peters based off ideas of James Gall in 1855
  • Attempts to more accurately display land size - Horizontal distortion near poles

Sinusoidal Map Projection

  • Equidistant Projection –

Good for showing distance from some central location

  • First created in 1570 by

Jean Cossin

  • Heavy distortion away

from central point

Robinson Map Projection

Other Notable Projections

Van der Grinten Projection

  • Projects the Earth as a circle
  • Extreme distortion as edges
  • Created by Alphons J. van der Grinten in 1904

Alber’s Conic Projection

  • Created by Johann Lambert in 1772
  • Transfers map onto a rounded cone, and then spreads it out - Shows areas accurately but distorts shapes - Meridians are equally spaced

Goode Homolosine projection

  • Created in 1923 by John Paul Goode to be an

alternative to Mercator

  • Preserves direction, but limits distortion