[GRASS-dev] [GRASS GIS] #3705: i.segment produces empty output

[GRASS GIS]

#3705: i.segment produces empty output
--------------------------+-------------------------------------
  Reporter:  martinl      |      Owner:  grass-dev@…
      Type:  defect       |     Status:  new
  Priority:  normal       |  Milestone:
 Component:  Imagery      |    Version:  unspecified
Resolution:               |   Keywords:  i.segment, empty output
       CPU:  Unspecified  |   Platform:  Unspecified
--------------------------+-------------------------------------
Description changed by martinl:

Old description:

> From G74:i.segment manual:
>
> ```
> i.group group=ortho_group input=ortho_2001_t792_1m at PERMANENT
> g.region -p raster=ortho_2001_t792_1m n=220446 s=220075 e=639151 w=638592
> i.segment group=ortho_group output=ortho_segs_l1 threshold=0.02
> ```
>
> The last command says
>
> ```
> i.segment complete. Number of segments created: 119346
> ```
>
> But output raster map is empty:
>
> ```
> r.info -r ortho_segs_l1
> min=NULL
> max=NULL
> ```
>
> All GRASS versions (7.7, 7.6, 7.4) seems to be affected.

New description:

 From G74:i.segment manual:

 {{{
 i.group group=ortho_group input=ortho_2001_t792_1m at PERMANENT
 g.region -p raster=ortho_2001_t792_1m n=220446 s=220075 e=639151 w=638592
 i.segment group=ortho_group output=ortho_segs_l1 threshold=0.02
 }}}

 The last command says

 {{{
 i.segment complete. Number of segments created: 119346
 }}}

 But output raster map is empty:

 {{{
 r.info -r ortho_segs_l1
 min=NULL
 max=NULL
 }}}

 All GRASS versions (7.7, 7.6, 7.4) seems to be affected.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3705#comment:1>
GRASS GIS <https://grass.osgeo.org>