What does a straight line on a Mercator map mean?
Mercator invented his map projection primarily for navigation. If you draw a straight line between two points on a map created using the Mercator projection, that line represents the direction you need to sail to travel between the two points. This type of route is called a rhumb line or loxodrome.
What are Mercator Lines?
Mercator projection, type of map projection introduced in 1569 by Gerardus Mercator. This projection is widely used for navigation charts, because any straight line on a Mercator projection map is a line of constant true bearing that enables a navigator to plot a straight-line course.
What is the main problem with a Mercator map?
Mercator maps distort the shape and relative size of continents, particularly near the poles. This is why Greenland appears to be similar in size to all of South America on Mercator maps, when in fact South America is more than eight times larger than Greenland.
Why is the Mercator map misleading?
For instance, the Mercator projection preserves the shape of countries while distorting the size, especially near the north and south pole. These circles are all the same size on the globe. The Mercator distorts size to preserve shape.
What type of line is represented by a straight segment between two points on a Mercator projection?
rhumb line
A rhumb line appears as a straight line on a Mercator projection map. The name is derived from Old French or Spanish respectively: “rumb” or “rumbo”, a line on the chart which intersects all meridians at the same angle. On a plane surface this would be the shortest distance between two points.
Is Mercator a conformal map?
Mercator is a conformal map projection. Directions, angles, and shapes are maintained at infinitesimal scale. Any straight line drawn on this projection represents an actual compass bearing.
Why is a Mercator map useful?
This map, with its Mercator projection, was designed to help sailors navigate around the globe. They could use latitude and longitude lines to plot a straight route. Mercator’s projection laid out the globe as a flattened version of a cylinder.
What are the pros and cons of the Mercator projection?
Advantage: The Mercator map projection shows the correct shapes of the continents and directions accurately. Disadvantage: The Mercator map projection does not show true distances or sizes of continents, especially near the north and south poles.