Bernard J. S. Cahill
Bernard Joseph Stanislaus Cahill (London, January 30, 1866 - Alameda County, October 4, 1944[1][2]), American cartographer and architect, was the inventor of the octahedral "Butterfly Map" (published in 1909 and patented in 1913[3]). An early proponent of the San Francisco Civic Center, he also designed hotels, factories and mausoleums like the Columbarium of San Francisco.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/34/Cahill_butterfly_conformal_projection_SW.jpg/220px-Cahill_butterfly_conformal_projection_SW.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Cahill_Butterfly_Map.jpg/220px-Cahill_Butterfly_Map.jpg)
His 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
editReferences
edit- ^ "Cahill, B. J. S. (Bernard J. S.)". SNAC. Retrieved January 21, 2020.
- ^ "Bernard Joseph Stanislaus Cahill (Architect)". Pacific Coast Architecture Database. Retrieved January 21, 2020.
- ^ Polanco, Alejandro (July 12, 2011). "Un mapa del mundo para terminar con los mapas del mundo". Tecnología Obsoleta (in Spanish). Retrieved January 21, 2020.
External links
edit- About Cahill
- Parry, David, "Architects' Profiles: Pacific Heights Architects #30 – Bernard J. S. Cahill". Includes photograph of Cahill.
- Bernard J. S. Cahill Collection, ca. 1889–1938 (Environmental Design Archives. College of Environmental Design. University of California, Berkeley. Berkeley, California)
- Finding Aid at the Online Archive of California
- Pictorial materials from the Bernard Joseph Stanislaus Cahill papers, Bancroft Library
- Bernard Joseph Stanislaus Cahill papers, (ca. 1900–1944), Bancroft Library
- Keyes, Gene, B.J.S. Cahill Butterfly Map Resource Page
- By Cahill
- "An Account of a New Land Map of the World" (The Scottish Geographical Magazine, 1909–09) pp. 449–469 [reproduced in 21 jpegs] The first publication and exposition of the Butterfly Map.
- "Map of the World" (U.S. patent 1,054,276, 1913) Washington, DC: United States Patent Office, 1913-02-25; filed 1912-03-05
- "Geographic Globe" (US Patent 1081207, 1913: rubber-ball globe which can flatten to a Butterfly Map, or return to ball shape.)
- "Projections for World Maps" (1929) —continued in separate 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. 128–133; illus.
- "One Base Map in Place of Five" (1940) Monthly Weather Review, 68/2, 1940–02, p. 4; 1 illus.