Mollweide 2021

The Mollweide projection is an equivalent region, pseudocylindrical map projection by and large utilized for worldwide guides of the world or night sky. It is otherwise called the Babinet projection, homalographic projection, homolographic projection, and curved projection. The projection exchanges precision of point and shape for exactness of extents in territory, and as such is utilized where that property is required, for example, maps portraying worldwide circulations.  mapolist

The projection was first distributed by mathematician and stargazer Karl (or Carl) Brandan Mollweide (1774–1825) of Leipzig in 1805. It was reevaluated and promoted in 1857 by Jacques Babinet, who gave it the name homalographic projection. The variety homolographic emerged from successive nineteenth-century use in star atlases.[1]

Nine-year WMAP picture (2012) of the enormous microwave foundation radiation.[2][3] Projected utilizing the Mollweide projection.

Ocean surface freon levels estimated by the Global Ocean Data Analysis Project. Projected utilizing the Mollweide projection.


1 Properties

2 Mathematical definition

3 See too

4 Notes

5 References

6 External connections


The Mollweide is a pseudocylindrical projection in which the equator is addressed as a straight even line opposite to a focal meridian one-a large portion of its length. Different equals pack close to the shafts, while different meridians are similarly divided at the equator. The meridians at 90 degrees east and west structure an ideal circle, and the entire earth is portrayed in a corresponding 2:1 oval. The extent of the space of the oval between some random equal and the equator is equivalent to the extent of the space on the globe between that equal and the equator, yet to the detriment of shape mutilation, which is critical at the border of the circle, albeit not as serious as in the sinusoidal projection.

Shape mutilation might be reduced by utilizing an interfered with adaptation. A sinusoidal intruded on Mollweide projection disposes of the focal meridian for exchanging half-meridians which end at right points to the equator. This partitions the globe into projections. Interestingly, an equal intruded on Mollweide projection utilizes different disjoint focal meridians, giving the impact of various circles joined at the equator. All the more seldom, the projection can be attracted sideways to move the spaces of mutilation to the seas, permitting the mainlands to stay more genuine to shape.

The Mollweide, or its properties, has propelled the formation of a few different projections, including the Goode’s homolosine, van der Grinten and the Boggs eumorphic.[4]

Numerical detailing

The projection changes from scope and longitude to plan arranges x and y by means of the accompanying equations:[5]

, at that point additionally θ =

. All things considered the emphasis ought to be circumvent; something else, division by zero may result.

There exists a shut structure opposite transformation:[5]


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