What is the Equal Area Map called?
Equal-area maps are also called equivalent or authalic. An equal-area map projection cannot be conformal, nor can a conformal map projection be equal-area.
What is the meaning of equal-area?
Definition of equal-area of a map projection. : maintaining constant ratio of size between quadrilaterals formed by the meridians and parallels and the quadrilaterals of the globe thereby preserving true areal extent of forms represented.
What are the advantages of an equal-area projection?
Advantage: The Equal-Area map projection show the correct sizes of landmasses and continents. Disadvantage: The Equal area map causes the shapes of landmasses to be altered and forced into curves. Who uses it? Researchers use Equal-Area maps to compare land sizes of the world.
What does an equal-area projection map distort?
a map projection in which quadrilaterals formed by meridians and parallels have an area on the map proportional to their area on the globe. synonyms: equal-area projection. types: homolosine projection. an equal-area projection map of the globe; oceans are distorted in order to minimize the distortion of the continents.
How are equal-area projection of Earth in accurate?
Meridians are equally spaced along the parallels. Finally, there is bilateral symmetry to maintain a x- and y-axis appearance similar to the Robinson projection. In effect, area is accurate while appearance is balanced to minimize distortions.
What is equidistant geography?
An equidistant projection is a map projection that maintains scale along one or more lines, or from one or two points to all other points on the map. The distance between the center point of the map and any other point is correct with an equidistant projection.
Under what condition is the system stable under equal area criterion *?
According to equal area criterion , if the rotor’s acceleration area during the fault is equal to its maximum possible deceleration area after the fault is removed, the system is in the transient stability critical state, and reaches its maximum value which represents TTC .
What is conformal projection used for?
A conformal projection maintains all angles at each point, including those between the intersections of arcs; therefore, the size of areas enclosed by many arcs may be greatly distorted. No map projection can preserve the shapes of larger regions.
How are equal area projections of Earth inaccurate?
In an equal-area map, the shapes of most features are distorted. No map can preserve both shape and area for the whole world, although some come close over sizeable regions. If a line from a to b on a map is the same distance (accounting for scale) that it is on the earth, then the map line has true scale.
What is sinusoidal projection in geography?
The sinusoidal projection is a pseudocylindrical equal-area projection displaying all parallels and the central meridian at true scale. The boundary meridians bulge outward excessively producing considerable shape distortion near the map outline.
What is a Mollweide projection map?
The Mollweide projection is an equal-area pseudocylindrical map projection displaying the world in a form of an ellipse with axes in a 2:1 ratio. It is also known as Babinet, elliptical, homolographic, or homalographic projection. The projection is appropriate for thematic and other world maps requiring accurate areas.
Are equal area maps accurate?
Equal area projections accurately represent the size of landmasses and oceans, but distort shape, scale, and/or angle. A projection can be either conformal or equal area, but never both. Equidistant projections accurately show the distances between some places, but not other places.