HOMOLOGRAPHIC PROJECTION OR GOODE PROJECTION - GEOGRAPHY - 2025

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.

The cartographic or geographic, is a system of graphical representation of each one of the points of the curved surface of the Earth or of a flat surface (map).

Characteristics of the homolographic projection

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.

Projection method

The Goode Homolosene projection combines the Mollweide projection, also used in world maps to represent low latitude areas, and the sinusoidal projection. 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 to this projection method is that the oceans appear warped.

Linear grids

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.

Properties

Shape

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 ′).

Area

The areas are represented very precisely.

Address

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.

Distance

It has a precise scale along the parallels of the sinusoidal part (between +/- 40 ° 44 ′), also in the central meridians of the projected areas.

Limitations

It only serves or is useful to represent maps of the world.

Uses and applications

This projection is used for world maps of the same area, especially for raster data.

Parameters

-False East

-False North

-Central meridian

-Option (used to indistinctly set the version oriented to land or also to the ocean)

Types of traditional map projection

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 JS Cahill, Dymaxion, Kavrayskiy VII, Robinson, Van der Grinten, Wagner VI, Waterman, Winkel-Tripel and Miller's cylindrical projection.

References

1. Goode's homolosene. Retrieved December 8, 2017 from desktop.arcgis.com
2. Cartographic projection. Consulted of es.wikipedia.org
3. John Paul Goode Biography. Consulted from upclosed.com
4. Cartographic conic, Goode and Mercator projections. Consulted of geografia.laguia2000.com
5. Interrupted projection. Consulted from yumpu.com
6. García Vera, Ruthie: Cartographic Projections (PDF) Recovered from mrsruthie.net