A homolographic projection or Goode projection is a type of cartographic projection made with maps of the whole world and of each of the five continents, in which each section is separated starting from a meridian. It was created in 1923 by the American geographer, John Paul Goode, for this reason it is also called the Goode homologous projection.
Due to the method used, the shape and size of the areas represented or projected in an interrupted pseudo-cylindrical shape have a high degree of accuracy, since their objective is to minimize distortion as much as possible..
Cartographic or geographical is a system of graphical representation of each of the points on the curved surface of the Earth or a flat surface (map).
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The main characteristic and utility of the homolographic cartographic projection is that it makes a projection of interrupted pseudo-cylindrical equivalent areas. It is specially designed to minimize cartographic distortion of the terrestrial globe or world map.
Goode's homolosine projection combines the projection of Mollweide, also used on the world map to represent areas of low latitudes, and the projection sinusoidal. Both projections are equivalent or of equal area and pseudo-cylindrical.
The projections are interrupted, allowing both the land masses (with the exception of Antarctica) and the oceans to be connected. The downside of this projection method is that the oceans appear warped.
In this type of projection or graphical representation of the globe, all latitudes are straight lines. It consists of six straight lines of length, a product of the interrupted shape of the projection.
Each lobe or area has its own central meridian, even though the base global central meridian is zero. This global central meridian can be changed, but in this case the oceans or blocks of the Earth's surface are no longer contiguous.
For the ground-facing version, the straight longitude values are -100 and 30 in the Northern Hemisphere, and -160, -60, 20, and 140 in the Southern Hemisphere.
For the ocean-facing version, the values are -140, -10, and 130 in the Northern Hemisphere, and -100, 20, and 140 in the Southern Hemisphere..
There is no distortion along the central meridians of the interrupted areas or lobes, not even in the equator of the sinusoidal part (between +/- 40 ° 44 ').
The areas are represented very precisely.
It has exact local angles along the central meridians of the areas or lobes and the Equator in its sinusoidal part; however, they are distorted in all other parts.
It has a precise scale along the parallels of the sinusoidal part (between +/- 40 ° 44 '), also in the central meridians of the projected areas.
It is only useful or useful to represent world maps.
This projection is used for world maps of the same area, especially for raster data..
-False East
-False north
-Central meridian
-Option (used to indistinctly set the version oriented to land or also to the ocean)
In addition to the Goode homolographic projection, there are other types of conventional map projections named after their creators, such as the projections of: Aitoff, Bernard J.S. Cahill, Dymaxion, Kavrayskiy VII, Robinson, Van der Grinten, Wagner VI, Waterman, Winkel-Tripel and Miller's cylindrical projection.
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