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La Tierra Plana escalada una en 250 millones

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  • 26 descargas

Descripción del modelo 3D

These models were made using MATLAB R2016a to make different projections of an Earth's topographical maps, in order to illustrate how the flatearthers think the Earth is.
The file's names explained: name_1_x_10_y.stl is 1 : x * 10y. So _1_6_10_7 is 1:600000000 or one in 60 million.

Different projections
Flatearthers, people that assure Earth is flat, do not often care about the size of the Earth, but they still believe global maps have the actual shape of the continents. In their Earth, the north pole is in the center, the continents are around it, and the south pole doesn't exist, the Antarctica is a "wall" around the world. Assuming that the continents have the same size, the distance in the surface between the north and south pole is pi x actual Earth's radius, is equal to the flat Earth disc radius. This left a 40000 km diameter. The "thickness" of this disc is unknown for them, and the topography would be so thin that it wouldn't be noticeable. I've choose a height enough for making its topography visible in the model printed. Here I present three different versions that are different projections of a topographic Earth map:
Azimutal
This is the most common representation of the flat Earth. The latitude is the radius in cylindrical coordinates, with the north pole as 0 radius and the south pole is the max radius (20000 km). In this projection the southern the latitude, the more spaced are the longitudes, so continents in the south are wider and more deformed than the north ones. This is the projection of the UN logo and flag.

Azimutal projection

Stereographic
This is not an usual representation. It is not even an stereographic projection, that projection has infinite radius. In this version the difference in latitude is equal to the difference of longitude. By this way the southern latitudes are wider and higher than norther ones, so continents may not keep the exact shape, but every pixel has proportional wide and height locally.

Stereographic projection

Bipolar
This model is an azimutal projection of the original one tilted 90° so the poles now are in the previous equator, at the previous north pole it is Africa, and the south pole is in the center of the Pacific Ocean. In this version, Antarctica is a continent and not a wall around the world, Africa and Europe are accurate to the real shape, the rest of the continent are equally deformed. However this view does not share with the others the mechanism of how the Sun and the Moon supposedly moves.

Bipolar projection

References
Surf to STL function for MATLAB

Other astronomical objects



Object


Scale [1:x]
K = 103 (thousand)M = 106 (million)G = 109 (billion)


Image




Inner Solar System



Mercury
20M, 60M,
120M



Venus
60M,
120M,
250M



Earth
60M,
120M,
250M



Luna
10M, 20M,
60M



Mars
20M, 60M,
120M



Phobos and Deimos
200K,
500K




Artificial



Salyut 7
40, 48, 80, 160




Near Earth Asteroids



Moshup and Squannit
8K,
20K,
40K



Ra-Shalom
20K,
40K



Castalia
8K,
20K,
40K



Bacchus
8K,
20K



Bennu
3K,
8K



Ryugu
3K, 8K,
20K



Geographos
40K,
80K



Phaethon
40K,
80K



Itokawa
3K,
8K



Eros
80K, 200K,
500K



Nereus
3K,
8K



Mithra
20K,
40K



Golevka
8K



Toutatis
40K,
80K




Main Asteroid Belt




Gaspra
200K



Annefrank
40K,
80K



Braille
20K,
40K



Vesta
2M, 4M,
10M



Šteins
40K,
80K,
200K



Iris
2M,
4M



Hebe
1M,
2M,
4M



Lutetia
500K, 1M,
2M



Julia
1M,
2M,
4M



Mathilde
500K,
1M



Juno
2M,
<a href="/tato_713/collections/one-in-four-million-scale"


Parámetros de impresión 3D

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Información sobre el 3D archive

  • Formato de diseño 3D: STL Detalles del fichero Cerrar
    • flatearth_azimuthal_1_25_10_7.stl
    • flatearth_bipolar_1_25_10_7.stl
    • flatearth_stereographic_1_25_10_7.stl
  • Fecha de publicación: 2021/03/29 14:57

Licencia

CC BY SA

Palabras-clave

Creador

Designs 192
Descargadas 2k
Ventas 20 US$
Seguidores 26

Currently moving from Thingiverse: www.thingiverse.com/tato_713 , my profile will be scarce in the meantime.

I'm a student in Bioengineering with specialisation on Embedded Systems at the FIUNER (Facultad de Ingeniería de la Universidad Nacional de Entre Ríos). My favourite tool for designing is SolidWorks, but I also use MATLAB, a mathematical source software, because I'm used to work with it, and I've find the way to create models with it from plotting surfaces.

If you want me to design a particular case for a phone, I'll ask you just to test the prototypes for it.

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