1. Robinson Projection Map & Mercator Projection Map
It is impossible to accurately represent the spherical surface of the earth on a flat piece of paper. While a globe can represent the planet accurately, a globe large enough to display most features of the earth at a usable scale would be too large to be useful, so we use maps. Also imagine peeling an orange and pressing the orange peel flat on a table - the peel would crack and break as it was flattened because it can't easily transform from a sphere to a plane. The same is true for the surface of the earth and that's why we use map projections.

2. Robinson Projection Map
During the 20th century, the National Geographic Society, various atlases, and classroom wall cartographers switched to the rounded Robinson Projection. The Robinson Projection is a projection that purposely makes various aspects of the map sightly distorted to produce an attractive world map. Indeed, in 1989, seven North American professional geographic organizations (including the American Cartographic Association, National Council for Geographic Education, Association of American Geographers, and the National Geographic Society) adopted a resolution that called for a ban on all rectangular coordinate maps due to their distorion of the planet.

3. Robinson Projection Map
Rounded
Less distortion of the planet than using a flat map
Visually appealing
Compromise projection
Lines of latitude are parallel straight lines
Longitude lines as nonparallel lines that become increasingly curved as you move farther away from the map's central meridian
It is a compromise projection; it does not eliminate any type of distortion, but it keeps the levels of all types of distortion relatively low over most of the map.

5. Mercator Projection Map
Geradus Mercator invented his famous projection in 1569 as an aid to navigators. On his map, lines of latitude and longitude intersect at right angles and thus the direction of travel - the rhumb line - is consistent. The distortion of the Mercator Map increases as you move north and south from the equator. On Mercator's map Antarctica appears to be a huge continent that wraps around the earth and Greenland appears to be just as large as South America although Greenland is merely one-eighth the size of South America. Mercator never intended his map to be used for purposes other than navigation although it became one of the most popular world map projections.

7. Let’s Compare Mercator Projection Robinson Projection
In the 1960s Arthur H.  Robinson, a Wisconsin geography professor, developed a projection which has become much more popular than the Mercator projection for world maps.  It was developed because modern map makers had become dissatisfied with the distortions inherent in the Mercator projection and they wanted a world projection which ‘looked’ more like reality.
In its time, the Robinson projection replaced the Mercator projection as the preferred projection for world maps.  Major publishing houses which have used the Robinson projection include Rand McNally and National Geographic.
As it is a pseudo-cylindrical projection, the Equator is its Standard Parallel and it still has similar distortion problems to the Mercator projection.
Between about the areas and shapes are well preserved.  However, the range of acceptable distortion has been expanded from approximately 15° north and south to approximately 45° north to south.  Also, there is less distortion in the Polar regions.
Unlike the Mercator projection, the Robinson projection has both the lines of altitude and longitude are evenly spaced across the map.  The other significant difference to the Mercator is that only the line of longitude in the centre of the map is straight (Central Meridian), all others are curved, with the amount of curve increasing away from the Central Meridian.
In opting for a more pleasing appearance, the Robinson projection ‘traded’ off distortions – this projections is neither conformal, equal-area, equidistant nor true direction.
Notice the huge distortions in the Arctic and Antarctic regions.