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What is wrong with quoting Columbus?
Peter H Dana
Readers may recall the article of Dr Muneendra Kumar published in September issue of Coordinates. Here is Dr Peter H Dana comments:

What is wrong with quoting Columbus’ strange views on the shape of the earth on the opening page of a chapter entitled, “The World is a Pear”?

Those lines are from Columbus’ “Letter on his Third Voyage.” Even Davis isn’t using that as a description of the size and shape of the earth, just a cute vision from the often mistaken Columbus.

On page 62 Davis writes:

“You may have laughed when you read the words that open this chapter about his idea that the world was shaped like a pear. Well the Joke’s on you.

One of the things we learned when the Vanguard satellite, launched in March 1958, went into orbit was that the Earth is not a sphere as we learned in grade school – a “fact” we have accepted since the days of Newton. In fact, astronomer John O’Keef determined from Vanguard’s orbit that the Earth I slightly pershaped with a bulge in the southern hemisphere – though not to the extent Columbus imagined.”

Not geodesy to be sure but certainly not “astonishing.”

 

Peter H Dana
Ph.D. Research Fellow and Lecturer Department of Geography The University of Texas at Austin pdana@mail.utexas.edu

 
October 2009
 
“We have just scratched the surface of what photogrammetry will do for all of us in the future”
  Sections
 
My-coordinates
  Good News!  
  “Bhuvan is a visualisation tool for showcasing India’s imaging capabilities and societal applications using remote sensing.”
 
   
says Dr V Jayaraman, Director, National Remote Sensing Centre, Indian Space Research Organisation, in an exclusive interview with Coordinates magazine on ‘Bhuvan’  
  India National Map Policy  
National Map Policy

Guidelines for implementing National Map policy
  Partnership  
NAV09
Maritime: 10 Nov, Southampton
Positioning & Location:12 Nov, Nottingham
Land:19 Nov, Teddington
Timing: 20 Nov, Teddington 
Air: 25 Nov, London
GPS/GNSS Symposium 2009
30 Nov to 1 Dec
Tokyo, Japan
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IGNSS Conference 2009
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Middle East Spatial Technology Conference & Exhibition
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Asia Oceania Region Workshop on GNSS
25-26 January 2010 
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GEOFORM+’2010
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GEOSIBERIA-2010
27 - 29 April
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