[GRASS-dev] [GRASS GIS] #1733: r.out.kml fails close to UTM Zone boundary

[GRASS GIS]

#1733: r.out.kml fails close to UTM Zone boundary
-------------------------+--------------------------------------------------
 Reporter:  voncasec     |       Owner:  grass-dev@…              
     Type:  enhancement  |      Status:  new                      
 Priority:  minor        |   Milestone:  6.4.3                    
Component:  Addons       |     Version:  6.4.2                    
 Keywords:  r.out.kml    |    Platform:  Linux                    
      Cpu:  x86-64       |  
-------------------------+--------------------------------------------------
Changes (by hamish):

  * type:  defect => enhancement


Comment:

 Hi, the author here.

 The number 1 solution is to reproject into lat/lon. It's KML's native,
 everything else is a shoe-horn.

 The convergence angle check for < 1px per 1280x1024 image size is provided
 as a convenience for the cases where you can mildly get away with doing
 the wrong thing without causing too much damage.
 It is measured at the center of the current computational region.

 from the help page:
 {{{
 KML expects data to be in Latitude-Longitude using the WGS84 datum and
 EGM96 vertical datum. This script will work for non-geographic map
 projections, but only if the projection's local deviation from true-north
 (the convergence angle) is small enough to ensure correct output. You can
 use the r.proj module from a Latitude-Longitude location to
 reproject maps if needed.
 At this time vertical datum is not checked by this module as support for
 it is relatively new in r.support and r.info.
 }}}


 I'm not in favour of letting the module produce broken and misaligned
 output. If you wish to bypass the check on your own, edit the script in a
 text editor and on line 126 comment out the "exit 1" by putting a '#'
 symbol in front of it.

 But it is much better to just reproject to LL and run the module in a
 lat/lon location, then the alignment will be perfect and the module will
 be happy.


 cheers,
 Hamish

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/1733#comment:1>
GRASS GIS <http://grass.osgeo.org>