Alfred H. Thiessen (April 8, 1872 – June 7, 1956) was an American
meteorologist
A meteorologist is a scientist who studies and works in the field of meteorology aiming to understand or predict Earth's atmospheric phenomena including the weather. Those who study meteorological phenomena are meteorologists in research, while t ...
after whom
Thiessen polygons are named.
Alfred H. Thiessen was born in
Troy
Troy ( el, Τροία and Latin: Troia, Hittite language, Hittite: 𒋫𒊒𒄿𒊭 ''Truwiša'') or Ilion ( el, Ίλιον and Latin: Ilium, Hittite language, Hittite: 𒃾𒇻𒊭 ''Wiluša'') was an ancient city located at Hisarlik in prese ...
,
New York
New York most commonly refers to:
* New York City, the most populous city in the United States, located in the state of New York
* New York (state), a state in the northeastern United States
New York may also refer to:
Film and television
* '' ...
. He earned a bachelor of science degree from
Cornell University
Cornell University is a private statutory land-grant research university based in Ithaca, New York. It is a member of the Ivy League. Founded in 1865 by Ezra Cornell and Andrew Dickson White, Cornell was founded with the intention to teach an ...
in 1898. His service in the
Weather Bureau
The National Weather Service (NWS) is an agency of the United States federal government that is tasked with providing weather forecasts, warnings of hazardous weather, and other weather-related products to organizations and the public for the p ...
began at Pittsburgh as observer on July 1, 1898. He subsequently was assigned to Helena, Washington, Point Reyes and Manteo as assistant, and to Mount Weather, Raleigh, Indianapolis, Salt Lake City, Portland, Baltimore, and Denver as official in charge. He resigned from the Weather Bureau on December 11, 1920, to accept a commission as Captain in the Regular Army. He left active service, as a major, and was reappointed at the Central Office of the Weather Bureau on March 17, 1941. He retired on April 30, 1942.
His best known work (1911) dealt with the description of weather prediction with a geometric method for dividing land areas, that although known from Dirichlet Tessellation (1850) and the Voronoi Diagram (1908), apparently had never been used in meteorology for interpolation of measurements. The synonyms
Thiessen polygons or
Thiessen method have become established for this application.
Thiessen polygons have also been used to estimate the areas of influence of
Mayan
Mayan most commonly refers to:
* Maya peoples, various indigenous peoples of Mesoamerica and northern Central America
* Maya civilization, pre-Columbian culture of Mesoamerica and northern Central America
* Mayan languages, language family spoken ...
city-states.
See also
*
Voronoi diagram
In mathematics, a Voronoi diagram is a partition of a plane into regions close to each of a given set of objects. In the simplest case, these objects are just finitely many points in the plane (called seeds, sites, or generators). For each seed th ...
References
*http://www.history.noaa.gov/nwsbios/nwsbios_page72.html
*
Voronoi diagram
In mathematics, a Voronoi diagram is a partition of a plane into regions close to each of a given set of objects. In the simplest case, these objects are just finitely many points in the plane (called seeds, sites, or generators). For each seed th ...
*A.H. Thiessen. 1911. Precipitation averages for large areas. ''Monthly Weather Review'', 39(7): 1082-1084
PDF copy of article
1872 births
1956 deaths
American meteorologists
Cornell University College of Agriculture and Life Sciences alumni
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