What is the term for a map that is made by wrapping a piece of paper around a globe?
Mercator Projection. In 1569, Gerardus Mercator (1512-1594) (Figure below) figured out a way to make a flat map of our round world. This is called the Mercator projection. Imagine wrapping the round, ball-shaped Earth with a big, flat piece of paper. Your map would be most correct at the Equator.
What is the flat map called?
A systematic transformation of the earth’s surface to a flat map is called a map projection. There are infinite ways to carry out this transformation.
What is a map distortion?
If a map preserves shape, then feature outlines (like country boundaries) look the same on the map as they do on the earth. A conformal map distorts areamost features are depicted too large or too small. The amount of distortion, however, is regular along some lines in the map.
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 are the 3 main map projections?
Three of these common types of map projections are cylindrical, conic, and azimuthal.
What are the 5 map projections?
Top 10 World Map ProjectionsMercator. This projection was developed by Gerardus Mercator back in 1569 for navigational purposes. Robinson. This map is known as a ‘compromise’, it shows neither the shape or land mass of countries correct. Dymaxion Map. Gall-Peters. Sinu-Mollweide. Goode’s Homolosine. AuthaGraph. Hobo-Dyer.
Which world map is most accurate?
What are the types of projections?
Projection Methods Used In Mechanical DrawingOrthographic Projection. Orthographic projection shows a 3D object in two dimensions so that you can see three views: the front view, side view and top view. Axonometric Projection. Axonometric is another type of orthographic projection. Oblique Projection. Perspective Projection.
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 wrong with the Robinson projection?
The Robinson projection is neither conformal nor equal-area. It generally distorts shapes, areas, distances, directions, and angles. The distortion patterns are similar to common compromise pseudocylindrical projections. Area distortion grows with latitude and does not change with longitude.
What is wrong with the Mercator projection?
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.
Which is a weakness of the Robinson projection?
Robinson projections are not equivalent; they do suffer from compression. However, the amount of area distortion is generally low within about 45° of the equator. Conformality: The Robinson projection is not conformal; shapes are distorted more than they would be in a truly conformal projection.
What are the pros and cons of a Robinson projection?
Advantage: The Robinson map projection shows most distances, sizes and shapes accurately. Disadvantage: The Robinson map does have some distortion around the poles and edges.
What is the purpose of the Robinson map?
The Robinson projection is a map projection of a world map which shows the entire world at once. It was specifically created in an attempt to find a good compromise to the problem of readily showing the whole globe as a flat image.
Which projection does National Geographic use now?
In 1998, the Winkel tripel projection replaced the Robinson projection as the standard projection for world maps made by the National Geographic Society. Many educational institutes and textbooks followed National Geographic’s example in adopting the projection, and most of those still use it.
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 is map projection used?
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.
How does a cartographer decide which map to use?
Before making a map, cartographers decide what area they want to display and what type of information they want to present. They consider the needs of their audience and the purpose of the map. These decisions determine what kind of projection and scale they need, and what sorts of details will be included.
What are the 7 elements of a map?
Elements of a MapData Frame. The data frame is the portion of the map that displays the data layers. Legend. The legend serves as the decoder for the symbology in the data frame. Title. The title is important because it instantly gives the viewer a succinct description of the subject matter of the map. North Arrow. Scale. Citation.
What are the 8 different types of maps?
Read and learn about 8 different types of maps. Political Maps, Physical Maps, Topographic Map, Climatic Map, Economic or Resource Map, Road Map and more. Article by Mocomi Kids!