Why does windy.com use Mercator projection?
rafaelntsilva last edited by rafaelntsilva
Mercator projection is incorrect! There are several more modern map projections that are more proportionate! I suggest you change that!
BW_controlroom last edited by
in fact, every map projection is incorrect. That comes with the projection & interpolation of things. The closest thing that shows earth very similar how it is, is a globe.
The map used in windy is great for navigation.
rafaelntsilva last edited by
Mercartor projection has huge projection errors! For example, Greenland is almost twice the size of Africa, and it portrays countries in the northern hemisphere larger than those in the southern hemisphere, which is totally wrong! North America is almost twice the size of South America! Brazil, for example, is about the same size as the United States, and Australia about the same size as the whole of Europe. This map is controversial, and in many places is considered a biased map. It would be nice if it were modified for more modern projections such as google uses!
As said @BW_controlroom all map projection are wrong. You must make compromises when you project a spherical surface (the globe) on a flat surface (map).
The Mercator projection is perfect for navigation, not for geographic application.
The true Mercator projection does not show countries of northern hemisphere larger than those in the southern hemisphere. At same latitude north or south the surface deformation is the same.
BW_controlroom last edited by
actually when you type into google "google maps projection" it always says, that they are using mercator or some hybrid based on mercator, until you "going into space". Good looks does not mean automatically that it is handy. I worked before for a map printing company and other world projections that are on paper or screen oval, bringing in the problem of filling "holes" in the corner. So if you are solving this problem that exists since maps/projections are existing you are going to be a rich man.
BTW (state of google on the 15.09.2019):
google maps (desktop) starts you usually in mercator and switches then to "globe" mode if you zoom out. I guess they "cheat" with mercator because the want to save bandwith & computing power. This is why monstrosities like google earth (and pro) existed, this programs/apps are for pro users.
google maps (mobile)still ueses some kind of mercator projection.
Good explanation !
Just to illustrate what you mean, Antarctica is not shown with a correct surface on Google map.
Fabio56 last edited by Fabio56
You are right, Google (as several web map providers do) uses the
"WGS 84 / Pseudo-Mercator" projection.
It uses the Mercator "spherical" formulas, that is, formulas written to project a SPHERE, for projecting the WGS84 ELLIPSOID. This is done for saving calculation time and resources.
In other words, the Google Maps projection is an adaptation of the Mercator projection, with some little error more than the original.
If you go to http://www.epsg-registry.org/ , and paste
WGS 84 / Pseudo-Mercator
in the search field, you find a rigorous description of that coordinate system.
bobdaran Banned last edited by
This post is deleted!