which is better the projection map or the mercator map and why??

Which projection map?

What do you mean by "better?" How are you planning to use this map?

why is the robinson projection better than the mercator projection map?

http://www.merriam-webster.com/dictionary/robinson+projection

that doesn't tell me which is better between the 2 and why?

From the above site:

"more accurately portraying high latitude lands and water to land ratio "

To determine which map projection is better, we need to consider their differences and their purposes.

The projection map refers to a type of map that represents a three-dimensional object (such as the Earth) onto a two-dimensional surface. One common example is the Robinson projection, which attempts to balance size, shape, and distance distortions. The advantage of projection maps is that they try to minimize distortion in various aspects, thus providing a relatively accurate representation of the Earth's features.

On the other hand, the Mercator projection is a cylindrical map projection commonly used for navigation purposes. It preserves straight lines and angles, making it useful for maritime navigation. However, it significantly distorts the size and shape of objects, causing significant exaggeration towards the poles. As a result, land masses near the poles appear excessively larger than they actually are.

Which map is better depends on the purpose for which it is being used:

1. For navigation or plotting a course, the Mercator projection may be preferred due to its ability to accurately represent angles and maintain straight lines. This helps sailors or pilots in determining their route easily.

2. For general representation of geographic features, the projection map with various types such as the Robinson projection, equal-area projections like the Eckert IV projection, or the Winkel Tripel projection might be more suitable. These projections attempt to balance the distortion of size, shape, and distance, providing a more visually accurate representation of the Earth's features.

In summary, if the purpose is navigation and maintaining accurate angles, the Mercator projection is suitable. However, for a more realistic depiction of land masses and other geographical features, projection maps are generally preferred. Ultimately, the choice of which map is "better" depends on the specific use case or intended application.