# What is a two dimensional map

## (a). Introduction to Maps

On a Mercator projection, the north-south scale increases from the equator at the same rate as the corresponding east-west scale. Mercator maps are used in navigation because a line drawn between two points of the Earth has true direction.

In the illustration distances in miles and kilometers are graphically shown. Figure 2a-1 displays a weather map showing the location of low and high pressure centers and fronts over most of North America.

## Two-Dimensional Maps

As a result of this feature, angles drawn on this type of map are correct. Mollweide projection.

However, this line may not represent the shortest distance between these points. Mercator map projection. All of these transformation processes create some type of distortion artifact.

Figure 2a-10: In Figure 2a-10 , we have maps representing an area of the world at scales of 1: This distortion makes middle and high latitude countries to be bigger than they are in reality. Some of the geographic properties affected by projection distortion include: Figure 2a-10 helps to explain this concept. For example, 1: The shape of the Earth's surface can be described as an ellipsoid.

Sinusoidal Equal-Area projection. It was specifically designed for nautical navigation.