[GRASS-dev] [GRASS GIS] #2913: i.segment.hierarchical: why is there a mandatory output option

GRASS GIS trac at osgeo.org
Thu Feb 18 23:02:54 PST 2016


#2913: i.segment.hierarchical: why is there a mandatory output option
--------------------------+-------------------------------------------
  Reporter:  mlennert     |      Owner:  grass-dev@…
      Type:  defect       |     Status:  new
  Priority:  normal       |  Milestone:  7.0.4
 Component:  Addons       |    Version:  unspecified
Resolution:               |   Keywords:  i.segment.hierarchical output
       CPU:  Unspecified  |   Platform:  Unspecified
--------------------------+-------------------------------------------

Comment (by zarch):

 Replying to [ticket:2913 mlennert]:
 > i.segment.hierarchical has the following parameters (among others):
 >
 >
 > {{{
 >           output   Name of output segment raster map
 >   outputs_prefix   Name for output raster maps from segment
 >                    par défaut: seg__%.2f
 > }}}
 >
 > I don't really understand the sens of 'output': The whole idea of the
 module is to create multiple output maps containing the results of
 hierarchical segmentation. So why would one need one single output map
 name ?

 Actually I wrote this module to have a single segmented output map! :-)

 The idea of the module was to parallelize the i.segment module into cores
 and nodes in a cluster on single tiles, once the segmentation per tile is
 done then patch the tiles in a unique map and apply i.segment using the
 segmented map as seed to obtain as output a large segmented map.

 I put also the option outputs_prefix, that probably should be change in
 "basename" to define the name of the "temporary" segmented tiles.

--
Ticket URL: <https://trac.osgeo.org/grass/ticket/2913#comment:1>
GRASS GIS <https://grass.osgeo.org>



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