Question: What Are The Three Map Projections?

What are the 5 map projections?

Top 10 World Map ProjectionsMercator.

This projection was developed by Gerardus Mercator back in 1569 for navigational purposes.


This map is known as a ‘compromise’, it shows neither the shape or land mass of countries correct.

Dymaxion Map.



Goode’s Homolosine.


Hobo-Dyer.More items…•.

What is the most accurate flat map?

View the world in correct proportions with this map. Areas like Greenland, Antarctica, and Africa are all distorted on traditional Mercator maps because it’s difficult, if not impossible, to replicate the globe in two dimensions. …

What map projection has the least distortion?

The only ‘projection’ which has all features with no distortion is a globe. 1° x 1° latitude and longitude is almost a square, while the same ‘block’ near the poles is almost a triangle.

Why is map projection necessary?

The need for a map projection mainly arises to have a detailed study of a region, which is not possible to do from a globe. … from a globe is nearly impossible because the globe is not a developable surface. In map projection we try to represent a good model of any part of the earth in its true shape and dimension.

Which is more accurate map or globe?

Globes are more accurate than maps for measuring the Earth because globes are a three-dimensional representation of the world, which itself is…

Are flat maps accurate for locations?

Flat maps must distort some properties of the planet’s surface — like scale or shape — so they can show others accurately. We’ve learned to tolerate these distortions over time, although it’s easy to forget how dramatic they can be.

What are the 4 types of map projections?

Types of Map ProjectionsGnomonic projection. The Gnomonic projection has its origin of light at the center of the globe. Less than half of the sphere can be projected onto a finite map. … Stereographic projection. The Stereographic projection has its origin of light on the globe surface opposite to the tangent point. … Orthographic projection.

What is the most common map projection?

Cylindrical ProjectionCylindrical Projection – Mercator One of the most famous map projections is the Mercator, created by a Flemish cartographer and geographer, Geradus Mercator in 1569. It became the standard map projection for nautical purposes because of its ability to represent lines of constant true direction.

Which map projection should I use?

Use equal area projections for thematic or distribution maps. Presentation maps are usually conformal projections, although compromise and equal area projections can also be used. Navigational maps are usually Mercator, true direction, and/or equidistant.

Why do all map projections have distortion?

Because you can’t display 3D surfaces perfectly in two dimensions, distortions always occur. For example, map projections distort distance, direction, scale, and area. Every projection has strengths and weaknesses.

Why are all maps wrong?

This is especially obvious for maps that use certain projections—ways of representing the Earth’s curved surface on a flat map—such as the popular Mercator projection, which could be found on many 20th-century classroom walls. Mercator maps distort the shape and relative size of continents, particularly near the poles.

What is the projection of a map?

In cartography, a map projection is a way to flatten a globe’s surface into a plane in order to make a map. This requires a systematic transformation of the latitudes and longitudes of locations from the surface of the globe into locations on a plane.

What is the major weakness of the Mercator projection?

Disadvantages: Mercator projection distorts the size of objects as the latitude increases from the Equator to the poles, where the scale becomes infinite. So, for example, Greenland and Antarctica appear much larger relative to land masses near the equator than they actually are.

What is an AuthaGraph map?

AuthaGraph is an approximately equal-area world map projection invented by Japanese architect Hajime Narukawa in 1999. The map is made by equally dividing a spherical surface into 96 triangles, transferring it to a tetrahedron while maintaining area proportions, and unfolding it onto a rectangle.

Why is Greenland so big on the map?

The Mercator projection, the second map, is very useful for navigation, as it keeps lines of longitude and latitude straight, but has to expand the polar regions to make it possible. This makes Greenland look big. … It is impossible to project a (roughly) spherical earth onto a flat map without significant distortion.