[GRASS-user] i.segment and i.segment.stats errors

[Markus Metz]

On Mon, Oct 8, 2018 at 1:19 PM Jamille Haarloo <j.r.haarloo at gmail.com>
wrote:
>
> Thank you Markus,
>
> I just got the i.segment results with Grass 7.6 (64 bit; r73480-35).
>
> This is the output:
> i.segment --overwrite group=DV4 at LUP1,IDM4 at LUP1,W2 at LUP1,W4 at LUP1
output=SegmW24IDM4DV4 threshold=0.25 minsize=5000 memory=10000
seeds=SegW24IDM4DV4 at LUP1 goodness=SegmW24IDM4DV4_goodn
> Maximum number of iterations set to 50
> Loading input bands...
> Loading seeds from raster map <SegW24IDM4DV4>...
> Processing pass 1...
> Processing pass 2...
> Processing pass 3...
> Processing pass 4...
> Processing pass 5...
> Processing pass 6...
> Processing pass 7...
> Processing pass 8...
> Processing pass 9...
> Segmentation converged after 9 iterations
> Assigning region IDs to remaining single-cell regions...
> Merging segments smaller than 5000 cells...
> Writing out segment IDs...
> Writing out goodness of fit
> ERROR: Region of size 635805 should be in search tree

This error is now fixed in trunk, relbr76, and relbr74 (r73512-4)

Markus M

>
> On Thu, Oct 4, 2018 at 4:07 PM Markus Metz <markus.metz.giswork at gmail.com>
wrote:
>>
>> Can you please try with GRASS 7.6 64 bit [0] and report if the error
still persists or not?
>>
>> Thanks,
>>
>> Markus M
>>
>> [0] https://wingrass.fsv.cvut.cz/grass76/x86_64/
>>
>> On Thu, Oct 4, 2018 at 5:07 PM Jamille Haarloo <j.r.haarloo at gmail.com>
wrote:
>> >
>> > Dear Grass community,
>> >
>> > I have been experimenting with i.segment, i.segment.uspo and
i.segment.stats on relatively small areas of a worldview-2 image.
>> > After some success I tried i.segment and i.segment.stats on the entire
area of 19875 ha, but I kept getting the same errors with i.segment.stats.
I started using a mask to eliminate most of the matrix, to see if that
helped. It did not, so I started the process again in i.segment but with
the previous segmentation output as seed to reduce processing. This time I
also got an error with i.segment in 2 attempts with different parameters. I
looked for documentation, but I couldn't find any solutions and I rather
not mess with the scripts. I do get a raster-output which looks ok, but
i.segment.stats fails to create an attribute table for further analyses. My
questions are: Is the area too big (too much pixels)? Are there too many
segments? The count of the last output is 9054 segments. Or should I start
the process again form the beginning without the seed assuming the Mask is
not the problem? The processing might take several weeks though.
>> >
>> >  i.segment error:
>> > ERROR: Region of size 501508 should be in search tree
>> >
>> > i.segment.stats errors:
>> > ERROR: Error while executing: 'CREATE TABLE segmstat_tmp_vect_7968
(cat int, area double precision, compact_circle double precision, DV2_mean
double precision, DV2_stddev double precision, DV2_variance double
precision, DV2_coeff_var double precision, DV2_first_quart double
precision, DV2_median double precision, DV2_third_quart double precision,
DV2_perc_90 double precision, DV4_mean double precision, DV4_stddev double
precision, DV4_variance double precision, DV4_coeff_var double precision,
DV4_first_quart double precision, DV4_median double precision,
DV4_third_quart double precision, DV4_perc_90 double precision, IDM2_mean
double precision, IDM2_stddev double precision, IDM2_variance double
precision, IDM2_coeff_var double precision, IDM2_first_quart double
precision, IDM2_median double precision, IDM2_third_quart double precision,
IDM2_perc_90 double precision, IDM4_mean double precision, IDM4_stddev
double precision, IDM4_variance double precision, IDM4_coeff_var double
precision, IDM4_first_quart double precision, IDM4_median double precision,
IDM4_third_quart double precision, IDM4_perc_90 double precision, W2_mean
double precision, W2_stddev double precision, W2_variance double precision,
W2_coeff_var double precision, W2_first_quart double precision, W2_median
double precision, W2_third_quart double precision, W2_perc_90 double
precision, DV4_mean double precision, DV4_stddev double precision,
DV4_variance double precision, DV4_coeff_var double precision,
DV4_first_quart double precision, DV4_median double precision,
DV4_third_quart double precision, DV4_perc_90 double precision,
neighbors_count double precision, area_nbrmean double precision,
area_nbrstddev double precision, compact_circle_nbrmean double precision,
compact_circle_nbrstddev double precision, DV2_mean_nbrmean double
precision, DV2_mean_nbrstddev double precision, DV2_stddev_nbrmean double
precision, DV2_stddev_nbrstddev double precision, DV2_variance_nbrmean
double precision, DV2_variance_nbrstddeGRASS_INFO_ERROR(7020,1):
>> > Traceback (most recent call last):
>> >   File "C:\Users\haarlooj\AppData\Roaming\GRASS7\addons/scri
>> > pts/i.segment.stats.py", line 370, in <module>
>> >     main()
>> >   File "C:\Users\haarlooj\AppData\Roaming\GRASS7\addons/scri
>> > pts/i.segment.stats.py", line 357, in main
>> >     gscript.run_command('db.execute', input=insert_sql,
>> > quiet=True)
>> >   File "C:\Program Files\GRASS GIS
>> > 7.4.0\etc\python\grass\script\core.py", line 421, in
>> > run_command
>> >     return handle_errors(returncode, returncode, args,
>> > kwargs)
>> >   File "C:\Program Files\GRASS GIS
>> > 7.4.0\etc\python\grass\script\core.py", line 332, in
>> > handle_errors
>> >     returncode=returncode)
>> > grass.exceptions.CalledModuleError: Module run None
>> > ['db.execute', '--q', 'input=Z:\\GRASS_GIS\\Cottica_LUP\\LUP
>> > 1\\.tmp/unknown\\7968.1'] ended with error
>> > Process ended with non-zero return code 1. See errors in the
>> > (error) output.
>> >
>> >
>> > _______________________________________________
>> > grass-user mailing list
>> > grass-user at lists.osgeo.org
>> > https://lists.osgeo.org/mailman/listinfo/grass-user
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