[GRASS-user] i.segment.stats memory usage error

[James Duffy]

On 27 October 2016 at 11:45, Moritz Lennert <mlennert at club.worldonline.be>
wrote:

>
>
> Le 27 octobre 2016 12:35:14 GMT+02:00, James Duffy <
> james.philip.duffy at gmail.com> a écrit :
> >On 27 October 2016 at 11:08, Moritz Lennert
> ><mlennert at club.worldonline.be>
> >wrote:
> >
> >>
> >>
> >> Le 27 octobre 2016 11:22:02 GMT+02:00, James Duffy <
> >> james.philip.duffy at gmail.com> a écrit :
> >> >Hello,
> >> >
> >> >I'm trying to use i.segment.stats with GRASS 7.0.4 in the osgeolive
> >> >32bit
> >> >operating system.
> >> >
> >> >Prior to using this tool I have successfully created my segmented
> >map
> >> >using
> >> >i.segment.
> >> >
> >> >When I try to execute the following command:
> >> >
> >> >i.segment.stats --overwrite --verbose map=gp_seg_optimum at gp1 \
> >> >rasters=gp_ortho.1 at gp1,gp_ortho.2 at gp1,gp_ortho.3 at gp1,gp_ortho.4 at gp1
> >\
> >> >raster_statistics=min,max,mean,stddev,variance,sum \
> >> >csvfile=/home/jpd205/Wales_GRASS/GarronPill/gp_seg_stats \
> >> >separator=comma
> >> >
> >> >I get this error:
> >> >
> >> >Calculating geometry statistics
> >> >ERROR: G_malloc: unable to allocate 4273800320 bytes of memory at
> >> >       /tmp/tmpgzUtnA/r.object.geometry/main.c:129
> >>
> >> This is coming from r.object.geometry.
> >>
> >> What are your region settings (g.region -p) ? How many segments do
> >you
> >> have ?
> >>
> >
> >GRASS 7.0.4 (GarronPill):~ > g.region -p
> >projection: 99 (OSGB 1936 / British National Grid)
> >zone:       0
> >datum:      osgb36
> >ellipsoid:  airy
> >north:      208007.00931776
> >south:      207952.59780698
> >west:       200993.90853302
> >east:       201097.28911076
> >nsres:      0.00430914
> >ewres:      0.00430914
> >rows:       12627
> >cols:       23991
> >cells:      302934357
>
> Are you sure 4mm is correct for the resolution ?
>

Yes. It's high resolution imagery from a drone.


>
> What does r.info on
>
>
> >
> >
> >>
> >> Try running I.segment.stats without requesting form statistics.
> >
> >
> >Running:
> >
> >i.segment.stats --overwrite --verbose map=gp_seg_optimum at gp1 \
> >csvfile=/home/jpd205/Wales_GRASS/GarronPill/gp_seg_stats \
> >separator=comma
>
> Default is to do form statistics, so the above line also does. I have to
> admit that I don't know what happens when you give an empty parameter such
> as
>
> area_measures= or area_measures=""
>
> What does r.info gp_seg_optimum give you ?
>

+----------------------------------------------------------------------------+
 | Map:      gp_seg_optimum                 Date: Thu Oct 27 06:45:57
2016    |
 | Mapset:   gp1                            Login of Creator:
jpd205          |
 | Location:
GarronPill                                                       |
 | DataBase:
/home/jpd205/Wales_GRASS                                         |
 | Title:     ( gp_seg_optimum
)                                              |
 | Timestamp:
none                                                            |
 |----------------------------------------------------------------------------|
 |
|
 |   Type of Map:  raster               Number of Categories:
0               |
 |   Data Type:
CELL                                                       |
 |   Rows:
12627                                                      |
 |   Columns:
23991                                                      |
 |   Total Cells:
302934357                                                  |
 |        Projection: OSGB 1936 / British National
Grid                       |
 |            N: 208007.00931776    S: 207952.59780698   Res:
0.00430914      |
 |            E: 201097.28911076    W: 200993.90853302   Res:
0.00430914      |
 |   Range of data:    min = 35  max =
133556294                              |
 |
|
 |   Data
Description:                                                        |
 |    generated by
i.segment                                                  |
 |
|
 |
Comments:                                                                |
 |    i.segment --overwrite --verbose -d group="gp_combo at gp1"
output="gp_s\   |
 |    eg_optimum" threshold=0.1 method="region_growing"
similarity="euclid\   |
 |    ean" minsize=10 memory=3000
iterations=20                               |
 |
|
 +----------------------------------------------------------------------------+


>
> Moritz
>
> >
> >Gives:
> >
> >Calculating geometry statistics
> >ERROR: G_malloc: unable to allocate 4273800320 bytes of memory at
> >       /tmp/tmpgzUtnA/r.object.geometry/main.c:129
> >
> >And try running r.object.geometry directly.
> >>
> >
> >Running:
> >
> >r.object.geometry --overwrite --verbose input=gp_seg_optimum at gp1 \
> >output=/home/jpd205/Wales_GRASS/GarronPill/gp_test separator=comma
> >
> >Gives:
> >
> >Current region rows: 12627, cols: 23991
> >ERROR: G_malloc: unable to allocate 4273800320 bytes of memory at
> >       /tmp/tmpgzUtnA/r.object.geometry/main.c:129
> >
> >
> >>
> >> Moritz
> >>
> >>
> >Thanks for your reply.
> >
> >James
>
>
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