Revision 564 org.gvsig.scripting/trunk/org.gvsig.scripting/org.gvsig.scripting.app/org.gvsig.scripting.app.mainplugin/src/main/resources-plugin/scripting/lib/geopy/distance.py

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distance.py
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`geopy.distance.distance`.
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Great-circle distance (:class:`.great_circle`) uses a spherical model of


  		




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the earth, using the average great-circle radius of 6372.795 kilometers,


  		




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resulting in an error of up to about 0.5%. The radius value is stored in


  		




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:const:`distance.EARTH_RADIUS`, so it can be customized


  		




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(it should always be in kilometers, however).


  		




  
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the earth, using the mean earth radius as defined by the International


  		




  
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Union of Geodesy and Geophysics, (2*a + b)/3 = 6371.0087714150598


  		




  
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kilometers approx 6371.009 km (for WGS-84), resulting in an error of up


  		




  
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to about 0.5%. The radius value is stored in


  		




  
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:const:`distance.EARTH_RADIUS`, so it can be customized (it should


  		




  
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always be in kilometers, however).


  		




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Vincenty distance (:class:`.vincenty`) uses a more accurate ellipsoidal model


  		




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of the earth. This is the default distance formula, and is thus aliased as


  		




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from geopy.point import Point


  		




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from geopy.compat import string_compare


  		




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# Average great-circle radius in kilometers, from Wikipedia.


  		




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# Using a sphere with this radius results in an error of up to about 0.5%.


  		




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EARTH_RADIUS = 6372.795


  		




  
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# IUGG mean earth radius in kilometers, from


  		




  
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# https://en.wikipedia.org/wiki/Earth_radius#Mean_radius.  Using a


  		




  
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# sphere with this radius results in an error of up to about 0.5%.


  		




  
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EARTH_RADIUS = 6371.009


  		




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# From http://www.movable-type.co.uk/scripts/LatLongVincenty.html:


  		




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#   The most accurate and widely used globally-applicable model for the earth


  		












Also available in:  Unified diff