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GS50, also hyphenated as GS-50, [1] is a map projection that was developed by John Parr Snyder of the USGS in 1982. The GS50 projection provides a conformal projection suitable only for maps of the 50 United States. Scale varies less than 2% throughout the area covered. Distortion is very low as well.
John Parr Snyder (12 April 1926 – 28 April 1997) was an American cartographer most known for his work on map projections for the United States Geological Survey (USGS). [1] Educated at Purdue and MIT as a chemical engineer, he had a lifetime interest in map projections as a hobby, but found the calculations tedious without the benefit of ...
"Speakers of the Provincial Assembly (1682-1790) (page 14/28)" (PDF). The Pennsylvania Manual, Volume 117 (2005-2006 General Assembly). Commonwealth of Pennsylvania Bureau of Publications "Speakers of the House of Representatives since 1791" (PDF). The Pennsylvania Manual, Volume 117 (2005-2006 General Assembly).
Here Snyder introduces what Save the Cat! is most famous for: the Blake Snyder Beat Sheet (or the BS2, as he calls it). The BS2 follows classic three-act structure but is more specific. Snyder refers to each act as thesis, antithesis, and synthesis, respectively. Opening Image (p. 1) – The Opening Image is the first visual of any movie, and ...
The Pennsylvania Manual (PDF). Vol. 117. Harrisburg: Pennsylvania Department of General Services. Archived from the original (PDF) on June 28, 2009. Trostle, Sharon, ed. (2007). The Pennsylvania Manual (PDF). Vol. 118. Harrisburg: Pennsylvania Department of General Services. ISBN 978-0-8182-0318-3. Archived from the original (PDF) on August 5 ...
General Snyder may refer to: Donald Snyder (general) (born 1936), U.S. Air Force lieutenant general Howard McCrum Snyder (1881–1970), U.S. Army major general
Snyder [6] describes generating formulae for the projection, as well as the projection's characteristics. Coordinates from a spherical datum can be transformed into Albers equal-area conic projection coordinates with the following formulas, where is the radius, is the longitude, the reference longitude, the latitude, the reference latitude and and the standard parallels:
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