[GRASS-dev] Re: [GRASS GIS] #426: v.in.ogr: split long boundaries

GRASS GIS trac at osgeo.org
Sun Mar 1 09:31:39 EST 2009

#426: v.in.ogr: split long boundaries
  Reporter:  neteler      |       Owner:  grass-dev at lists.osgeo.org
      Type:  enhancement  |      Status:  new                      
  Priority:  major        |   Milestone:  6.5.0                    
 Component:  Vector       |     Version:  unspecified              
Resolution:               |    Keywords:                           
  Platform:  All          |         Cpu:  All                      
Comment (by mmetz):

 After lots of testing and debugging with the help of Markus Neteler, I
 would like to add boundary splitting in trunk and maybe in devbr6, but
 want to ask first about how to implement it:

 1) enable boundary splitting by default, disable with new flag. That's my

 2) enable boundary splitting with new flag, don't split by default.

 3) always split boundaries, no option to disable.

 4) forget about it, leave v.in.ogr as it is.

 If boundary splitting gets added to v.in.ogr, the man page would be
 updated with a hint to use v.build.polylines if boundary segments should
 be joined again.

 With boundary splitting, v.in.ogr is roughly 2x (1.5x - 3x) faster on
 shapefiles with areas. That's not as much as I hoped for, but something.

 Please vote :-)

 Markus M

Ticket URL: <http://trac.osgeo.org/grass/ticket/426#comment:6>
GRASS GIS <http://grass.osgeo.org>

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