[GRASS-dev] Re: [GRASS GIS] #1424: Profile tool always casts to integers (incl. csv output)

[GRASS GIS]

#1424: Profile tool always casts to integers (incl. csv output)
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 Reporter:  hamish                   |       Owner:  grass-dev@…              
     Type:  defect                   |      Status:  new                      
 Priority:  major                    |   Milestone:  6.4.2                    
Component:  wxGUI                    |     Version:  svn-releasebranch64      
 Keywords:  profile tool, precision  |    Platform:  All                      
      Cpu:  All                      |  
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Comment(by hamish):

 Also I notice an occurrence of `sqrt(a^2 + b^2)` in profile.py, which is
 to be avoided as it gives the wrong answer from lat/long locations.

 {{{
 if lasteast and lastnorth:
     dist = math.sqrt(math.pow((lasteast-point[0]),2) + math.pow
 ((lastnorth-point[1]),2))
 }}}

 in trunk there is the m.measure C module to use a front end to
 G_distance().

 In 6.x we used to have swig/python/examples/m.distance as a python front-
 end to that; I'm not sure if a simple ctypes replacement exists yet or
 not.


 thanks,
 Hamish

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Ticket URL: <https://trac.osgeo.org/grass/ticket/1424#comment:1>
GRASS GIS <http://grass.osgeo.org>