- Waterman butterfly projection
The Waterman "Butterfly" World Map Projection was created by Steve Waterman and published in 1996. It is an octahedral transformation of a globe, reviving the Butterfly Map principle first developed by
Bernard J.S. Cahill(1866-1944) in 1909. Whereas Cahill's approach was that of an architect, Waterman derived his design from his work on close-packing of spheres.
This involved the interpretation of a spherical extraction from cubic closest packed spheres, into a corresponding convex hull. Then for its projection; straight lines were used to define each 5 x 5 section onto this convex hull.
Projection employed an equal length delineation approach for the equator. Latitudes were drawn in three straight line sections ( in each octant ) - from pole to fold-line, fold-line to largest line parallel to equator, and then from there to the equator. The largest line parallel to the equator also has equal length delinations. One particular Waterman Polyhedron best served to minimize land sinues ( breaking up of land masses ) and was therefore chosen.
Like Buckminster Fuller's 1943 Dymaxion Projection, an octahedral Butterfly Map can show all the continents uninterrupted if its octants are divided at the proper meridian, and joined, e.g., at the North Atlantic, as in this version, where the meridian cut is 20° W.
Waterman's 1996 edition is a Beta, approximating an Equal Area approach. A more precise rendering is in preparation, expected by 2008, but the current version nonetheless shows reasonably good size, shape, and position of the continents, especially as compared to a globe. Its graticule (latitude-longitude weave) is done at a 5-degree resolution.
Bernard J.S. Cahill
* [http://www.watermanpolyhedron.com Steve Waterman's Home Page]
* [http://odtmaps.com/detail.asp_Q_product_id_E_WAT-26.5x38-V1-proto ODT Resources for World Maps]
* [http://www.progonos.com/furuti/MapProj/Normal/ProjPoly/projPoly.html Carlos A. Furuti, Map Projections: Polyhedral Maps]
* [http://www.progonos.com/furuti/MapProj/Normal/ProjTbl/projTbl.html Carlos A. Furuti, All major map projections]
* [http://www.watermanpolyhedron.com/CART5.html Rotating Waterman as globe Izidor Hafner]
* [http://in-betweener.org/flatworlds/maps/earth-literacy-UNESCO-60th.html Flat Worlds, Earth Literacy, and Map Alphabetism] (Write-up comparing other world maps.)
* [http://www.pnyv.org/index.php?id=495 Positive News Youth Views site] (Waterman selected as their signet.)
Wikimedia Foundation. 2010.
Look at other dictionaries:
Waterman — may refer to:*Watermen, river workers who transferred passengers across and along the city centre rivers in Britain * Watermen, harvesters of seafood in the Chesapeake Bay region of the United States * The term waterman (or, more recently,… … Wikipedia
Steve Waterman — is a producer for both movies and television. He was co producer for Casper and executive producer for Stuart Little and Stuart Little 2. He is currently producing the upcoming live action/CGI animated Alvin and the Chipmunks movie.Steve Waterman … Wikipedia
Список картографических проекций — В этом списке картографические проекции рассортированы по виду поверхности проектирования. Традиционно выделяют три категории проекций: цилиндрические, конические и азимутальные. Некоторые проекции трудно отнести к какой либо из этих трёх… … Википедия
World map — This article is about maps of the Earth. For other uses, see World map (disambiguation). Historical map of the world by Ortelius, 1570 CE A world map is a map of the surface of the Earth, which may be made using any of a number of different map… … Wikipedia
Suriname — Republic of Suriname Republiek Suriname (Dutch) … Wikipedia
migration — migrational, adj. /muy gray sheuhn/, n. 1. the process or act of migrating. 2. a migratory movement: preparations for the migration. 3. a number or body of persons or animals migrating together. 4. Chem. a movement or change of position of atoms… … Universalium
MUSIC — This article is arranged according to the following outline: introduction written sources of direct and circumstantial evidence the material relics and iconography notated sources oral tradition archives and important collections of jewish music… … Encyclopedia of Judaism