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Go to B.J.S. Cahill Online Resource.
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map development |
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Cahill 1909
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Cahill-Keyes 1975 |
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Note: being averse to small print, I
composed
this in an 8" frame with ca. 12 pt. serif type. If you
are like me, you may
wish to enlarge your screen view to show a similar frame
and font size, in case there is a puny default.
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B.J.S.
Cahill Butterfly Map
Online Resource: Octahedral Map of the World Compiled by Gene Keyes 22nd Edition 2016-09-14: added link to new GK page re Cahill Conformal Variant; more to come.
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Contents
These hotlinks scroll down to a subsection, whose links open each listing on a separate page 1) B.J.S. Cahill himself 1.0) Photos 1.1) Publications 1.2) Unpublished (but online) material 1.3) Cahill octahedral world map images 1.4) Articles about Cahill octahedral map 1.5) Cahill archive listings 1.6) Other references (tba): not, or not yet, online 2) Post-Cahill 2.1) Buckminster Fuller (Dymaxion Map, 1943, 1954; non-Cahill) 2.2) Gene Keyes (Cahill-Keyes Multi-scale Megamap, 1975 ff) 2.3) Steve Waterman (Waterman Butterfly Map, 1996 ff) |
| 1) B.J.S. Cahill
himself 1.0) Photos To triple this image size, click once. To restore smaller size, click twice. Note: in triple size, you can see the mapwork on the polygon; and at the far right, a corner of his Gnomonic variant. 
B.J.S. Cahill (1866-1944): Architect and Cartographer Source: Scanned by Gene Keyes in 2012
from undated duplicate of
photo (ca. 1936?) at Bancroft Library, University of California at Berkeley, Bernard Joseph Stanislaus Cahill Papers, (83/39)  B.J.S. Cahill, ca. 1940
Source: pdf from Cahill
grandchildren; converted to jpeg by GK.
Photos reproduced with permission
from the descendants of B.J.S. Cahill:
Laura Cahill Huber, Susan Cahill Aylward, and Stanley James Cahill. |
| 1.1) Online papers and
publications by B.J.S. Cahill: Annotated link-list [still in progress]
1909-02 / 1909-09 Cahill, B.J.S., "An Account of a New Land Map of the
World" (The Scottish Geographical Magazine,
1909-09) p. 449-469.
The first publication
and exposition of the Butterfly Map. Strong critique
of Mercator for classrooms.
1912-03-05 / 1913-02-25
Cahill, B.J.S., "Map of the World", U.S. Patent
1,054,2761913 (Washington, DC: United States
Patent Office, 1913-02-25; filed 1912-03-05.) 3 p. Cahill's patent of
the Butterfly Map itself. Online here as jpegs, pdf,
or HTML.
1912-10 / 1913-10
Cahill, B.J.S., "A Land Map of the World on a New
Projection" (Journal of the Association of
Engineering Societies, 1913-10; orig. 1912-10) p.
153-207Cahill's longest and
most thoroughgoing published exegisis of his
Butterfly Map; also includes 50 illustrations, 20 of
which are a comparison of various map projections to
the same scale using the same size globe-circle for
each. Over three decades before Buckminster Fuller’s
1943 Dymaxion map, Cahill had already created a far
more elegant octahedral world map, and shown how it
is designed for thinking “planetarily”. Article is
re-formatted in HTML with all the illustrations.
1913-02-11 / 1913-12-09
Cahill, B.J.S., "Geographic Globe" (Washington,
DC: United States Patent Office, 1913-12-09; filed
1913-02-11) 2 p. + extra photo.Cahill's patent for a
rubber-ball globe which can flatten to a Butterfly
Map, or return to ball shape. Online here as jpegs,
pdf, or HTML.
ca.1920
Cahill, B.J.S., The Butterfly Map: The Surface of
the World Shown on an Eight-Part Decentralized
Projection (n.d., ca. late 1919 or early
1920) 8 p. illus.Promotional pamphlet
(shown here in 8 jpegs), with
(a) descriptive material and pictures, front and
back pages;
(b) reprints of two of his illustrated articles, deprecating the Mercator map; (c) three pages of blurbs from prominent geographers, educators, and personages of the day (including two by John Paul Goode, who went on to perpetrate the Homolosine three years later). 1928-12-28 / 1929-04
Cahill, B.J.S., "Projections for World Maps"—and text continued in separate pdf, plus illustrations:— Cahill, B.J.S., "A New Map for Meteorologists: Equally Suitable for Small Areas, Continents, Hemispheres or the Entire World" – both from Monthly Weather Review, 57/4, 1929-04) p. 128-133; illus. Has Cahill's only
published [partial] world map with a one-degree
graticule, except on land areas; as well, one
of his only published five-degree world maps,
regrettably discontinuous on two pages. See similar
map in [1934] below, octants together, but in
an awkward north-south spread, which I also show enlarged; and cf
[1940] below, in Butterfly layout.
Pdf's are re-posted on my page via
above links for convenience; source URLs were:
http://docs.lib.noaa.gov/rescue/mwr/057/mwr-057-04-0128.pdf
http://docs.lib.noaa.gov/rescue/mwr/057/mwr-057-04-0130.pdf 1934
Cahill, B.J.S., "A World Map to End World Maps"
(Geografiska Annaler, 1934) p. 97-108.Argues against
proliferation of arcane projections, and sets
forth three major Variants to improve upon his
original design: Conformal, Equal Area, and Gnomonic,
within his basic octahedral framework. "When finally
map and globe practically agree . . . the need of
further world mapping comes naturally to an end."
1940-04-03; 1940-05-20
Cahill, B.J.S., "One Base Map in Place of Five"
(1940) Monthly Weather Review, 68/2, 1940-02
[1940-05-20], p.4; 1 illus.Again urges the
meteorological community to display data on a single
world map, his Conformal Variant. Unlike items 6 and 7
above, here the map is shown in its customary
Butterfly profile, Pacific aspect. This was Cahill's
final article; he died in 1944 after a long illness.
Pdf re-posted on my page via above link for convenience;
source URL washttp://docs.lib.noaa.gov/rescue/mwr/068/mwr-068-02-0041.pdf
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| 1.2) Unpublished
Material by B.J.S. Cahill: 1939; 2011-10-01
Cahill, B.J.S., "The Butterfly Map of the World Today"
(Typescript, [1939] edited and formatted in HTML and with
Foreword by Gene Keyes) 54 p.Unpublished and
unfinished book typescript: history, vicissitudes, and
prospects for Cahill's octahedral map system. Lightly
edited by gk for typos, etc.
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| 1.3) Cahill octahedral
world map images (scanned and compiled by GK)
• A Comparative Gallery of 25 Cahill (and later) octahedral maps [1st ed.] • Cahill's largest world map: an analysis with full size online images • B.J.S. Cahill's Butterfly World Map: Five Desk Versions (Updated with fifth
map, 2015-03-31.)
• Cahill's "Variants" clarified 1) Conformal 2) Equal Area (tba) 3) Gnomonic (tba) |
| 1.4) Articles about
Cahill octahedral map [Both are in same link, but
reverse order.]
1913-07-26 Lauds Cahill map as "the
best attempt so far to map the globe on a plane."
1943-03-14
Kaempffert, Waldemar, "True World Maps: Cahill Projections
Drawn Like Patterns for the Globe" (New York
Times, 1943-03-14)An ineffectual
description, as if to counter Life Magazine's debut of Buckminster
Fuller's Dymaxion map two weeks earlier
(1943-03-01). Too little, too late.
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| 1.5) Cahill archive
listings • Three archives at University of California, Berkeley • Digitized listing of Cahill map collection at Bancroft Library, U.Cal. Berkeley |
| 2)
Post-Cahill 2.1) Buckminster Fuller (Dymaxion Map, 1943, 1954: non-Cahill) Why Cahill? What about Buckminster
Fuller?
 2009-06-15
Keyes, Gene, Evolution of the Dymaxion Map: An
Illustrated Tour and Critique [on 17
interlinked Web pages].
Summary: I love Bucky, but Cahill's map is a lot
better. Here's how.
Detailed discussion with profusely illustrated comparison of Fuller and Cahill maps. Includes first online image of Cahill's unpublished but significant 1936 5° Equal Area Variant "C" (fig. 9.2.1). |
| 2.3) Steve
Waterman (Waterman Butterfly Map, 1996) Cahill-similar mapwork
of Steve Waterman
[GK] Review of Waterman World Map (2010) My
review is favorable toward this Cahill-like Butterfly map,
but demurs at its separate Antarctica cut-out, and some
erroneous Arctic coastlines. It also details points of
difference between his design and graticule, and mine. [A
newer and improved version of the Waterman has since been
issued, in 2012.]
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