View source for Bernard J. S. Cahill

{{Short description|Inventor of the butterfly projection map}}
[[File:Cahill butterfly conformal projection SW.jpg|thumb|Cahill butterfly, conformal version of the projection. 15° graticule, 157°30′E central meridian.]]
[[Image:Cahill Butterfly Map.jpg|thumb|From cover of 1919 pamphlet by Cahill, ''"The Butterfly Map"'', 8 p.]]
'''Bernard Joseph Stanislaus Cahill''' ([[London]], January 30, 1866 - [[Alameda County]], October 4, 1944<ref>{{cite web |url=https://snaccooperative.org/ark:/99166/w65h8kb3 |title=Cahill, B. J. S. (Bernard J. S.) |access-date=January 21, 2020 |publisher=SNAC }}</ref><ref>{{cite web |url=http://pcad.lib.washington.edu/person/1936/ |title=Bernard Joseph Stanislaus Cahill (Architect) |access-date=January 21, 2020 |publisher=Pacific Coast Architecture Database }}</ref>), American [[cartographer]] and [[architect]], was the inventor of the octahedral "Butterfly Map" (published in 1909 and patented in 1913<ref>{{cite web |url=https://alpoma.net/tecob/?p=5061 |title=Un mapa del mundo para terminar con los mapas del mundo |access-date=January 21, 2020 |last=Polanco |first=Alejandro |date=July 12, 2011 |work=Tecnología Obsoleta |language=es }}</ref>). An early proponent of the [[Civic Center, San Francisco|San Francisco Civic Center]], he also designed hotels, factories and mausoleums like the [[Columbarium of San Francisco]].
His [[polyhedral map projection|polyhedral]] Butterfly World Map, like [[Buckminster Fuller]]'s later [[Dymaxion map]] of 1943 and 1954, enabled all continents to be uninterrupted, and with reasonable fidelity to a globe. Cahill demonstrated this principle by also inventing a rubber-ball globe which could be flattened under a pane of glass in the "butterfly" form, then return to its ball shape.
A variant was developed by [[Gene Keyes]] in 1975, the [[Cahill–Keyes projection]].
==See also==
*[[World map]]
*[[Waterman butterfly projection]]
*[[Octants projection]]
*[[Cahill–Keyes projection]]
==References==
{{reflist}}
==External links==
;About Cahill
*[https://web.archive.org/web/20070407144207/http://www.classicsfproperties.com/Architecture/BernardJSCahill.htm Parry, David, "Architects' Profiles: Pacific Heights Architects #30 – Bernard J. S. Cahill"]. Includes photograph of Cahill.
*[http://www.oac.cdlib.org/findaid/ark:/13030/tf029001hc Bernard J. S. Cahill Collection, ca. 1889–1938] (Environmental Design Archives. College of Environmental Design. University of California, Berkeley. Berkeley, California)
*[http://www.oac.cdlib.org/findaid/ark:/13030/tf029001hc Finding Aid at the Online Archive of California]
*[http://www.oac.cdlib.org/search?query=Bernard%20Cahill%20Papers;style=oac4;institution=UC%20Berkeley::Bancroft%20Library;idT=UCb107162854 Pictorial materials from the Bernard Joseph Stanislaus Cahill papers], [[Bancroft Library]]
*[http://www.oac.cdlib.org/search?query=Bernard%20Cahill%20Papers;style=oac4;institution=UC%20Berkeley::Bancroft%20Library;idT=UCb112340982 Bernard Joseph Stanislaus Cahill papers, (ca. 1900–1944)], [[Bancroft Library]]
*[http://www.genekeyes.com/B.J.S._CAHILL_RESOURCE.html Keyes, Gene, ''B.J.S. Cahill Butterfly Map Resource Page'']
;By Cahill
*[http://www.genekeyes.com/CAHILL-1909/Cahill-1909.html "An Account of a New Land Map of the World"] (The Scottish Geographical Magazine, 1909–09) pp.&nbsp;449–469 [reproduced in 21 jpegs] The first publication and exposition of the Butterfly Map.
*"Map of the World" ({{US Patent|1054276}}, 1913) Washington, DC: United States Patent Office, 1913-02-25; filed 1912-03-05
* "Geographic Globe" ([https://archive.today/20121214070437/http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=1081207 US Patent 1081207], 1913: rubber-ball globe which can flatten to a Butterfly Map, or return to ball shape.)
*[http://docs.lib.noaa.gov/rescue/mwr/057/mwr-057-04-0128.pdf "Projections for World Maps"] (1929) &mdash;continued in separate pdf:&mdash; [http://docs.lib.noaa.gov/rescue/mwr/057/mwr-057-04-0130.pdf "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) pp.&nbsp;128–133; illus.
* [http://docs.lib.noaa.gov/rescue/mwr/068/mwr-068-02-0041.pdf "One Base Map in Place of Five"] (1940) Monthly Weather Review, 68/2, 1940–02, p.&nbsp;4; 1 illus.
{{Map projections}}
{{Authority control}}
{{DEFAULTSORT:Cahill, Bernard J. S.}}
[[Category:1866 births]]
[[Category:1944 deaths]]
[[Category:American cartographers]]
[[Category:Map projections]]
[[Category:Architects from San Francisco]]