| B.J.S CAHILL'S BUTTERFLY MAP
AND BEYOND: A COMPARATIVE GALLERY OF OCTAHEDRAL WORLD MAPS Compiled by Gene Keyes |
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| Date |
Author |
This scale |
<— Source |
<— % change |
| 1996; 2003* |
Carlos A. Furuti |
1/200 M |
1/256 M |
128% |
Type |
Aspect |
Defining Meridian |
Geocells |
Original size |
| Truncated Octahedron Gnomonic |
N.Atlantic |
20º W |
10º |
85 x 145 m |
| Remarks: |
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| Despite the truncated octants similar to Cahill's
equal-area variants, it is still a gnomonic. Furuti's website has eight alternate
versions of this—satellite imagery, etc.—but they are cut in a non-Butterfly
pattern to facilitate folding into a polyhedral pseudo-globe; and so not
shown in this gallery of Butterfly or M-shapes. Included here instead are
Furuti's alternates among the full-triangular gnomonics. (Above example is
the only truncated Butterfly-as-such on his site.) * © 1996, 1997 Carlos A. Furuti; first online date 2003-02, per Internet Archive. |
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| Source (print) |
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| [See Furuti's printable and foldable online
versions on his website, below.] |
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| Source (online: page title &
link) |
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| http://www.progonos.com/furuti/MapProj/Normal/ProjPoly/projPoly.html Printable and foldable [but in a non-Butterfly layout]: progonos.com/furuti/MapProj/Normal/ProjPoly/Foldout /TOctahedron/toctahedron.html |
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| Source (online: item link) |
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| http://www.progonos.com/furuti/MapProj/Normal/ProjPoly/Img/tocGn-s50-z20.png |
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