Map projections - Classification of map projections

4 important questions on Map projections - Classification of map projections

Explain cylindrical equal-area projection

Cylindrical map projection that correctly represents areas: scale is true along the equator

Explain equidistant cylindrical projection

Gives true distance from north to south, but not correct from east to west. Both shape and area are well preserved on this projection

Explain Robinson projection (pseudo-cylindrical projection)

Is a cylindrical map projection but its medridians are represented by curves and not by straight lines. Overall distortions are small, more realistic world view.
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For what are secant map surfaces used?

To reduce or average scale erros since the lines of intersection are not distorted on the map

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