Maps and Map Projections

These notes are a supplement and are in no way a substitute for what happens in class. 
In class there are activities and exercises that involve application of the material. 
The test will involve not only memorization of facts but also the application and use of those facts in a meaningful manner.  
This is higher order learning and more relevant to the “real world”.

Conical Map
 
  • Used for road maps and weather.
  • Projections are made from a globe onto a cone shape
  • Great for mapping small areas

 

Mercator Map

Used mainly on ships
Project the correct shape of continents
Distorts the area because the longitude lines are drawn parrallel
Greenland apears to be larger than South America on this projection
 Extra-Mercator map is very useful for navigation because a straight line on the map corresponds to a compass heading.  If you look carefully at the map below, both parallels and meridians are straight lines and cross at right angles.  The meridians are equally spaced, but parallels are not.  This is because the Mercator projection is constructed by straightening the lines of longitude and by increasing the space between latitude equal to the space of longitudinal widening.  This projection is most accurate within 15 degrees of the equator.  Distortion is so severe near the pole that the northern and southern limits of the map are fixed at the 84th parallel.
 

Robinson Map

Gives the most accurate shape and areas of any map projection
Longitude lines are drawn curved like on a globe