| 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 |
| 1920 |
B.J.S. Cahill |
1/200 M |
1/470 M |
235% |
Type |
Aspect |
Defining Meridian |
Geocells |
Original size |
| Curvilinear Equal-area |
S. Pacific |
22 1/2° |
7 1/2° |
35 x 85 mm |
| Remarks: |
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| Cahill scooped many of my ideas before I was born: I thought
at least I had devised the "M" layout in lieu of his usual Butterfly. Once
again he got there first: this from a 1920 article showing 8 different arrangements
for a kind of updatable atlas he was preparing, one of many stillborn Cahill
efforts. (My version joins at the S. Atlantic.) While the M-shape never supplanted
Cahill's Butterfly layout, he also showed it with yet another unused equal-area
design, his 1934 "E" variant (not the above letter E). |
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| Source (print) |
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| B.J.S. Cahill, "A Unique Commercial Atlas and World Map"
(Pacific Marine Review, n.d., ca. [1920]-03) p. 111-113 |
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| Source (online: page title & link) |
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| This page http://www.genekeyes.com/CAHILL_GALLERY/1920-Cahill-M-S.Pacific.html |
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| Source (online: item link) |
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| This page http://www.genekeyes.com/CAHILL_GALLERY/1920-Cahill-M-S.Pacific.jpg |
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