[GRASS-user] Problem running i.segment.stats

GRASS GRASS user
1

Hello,

I’m using GRASS 7.0.4 on the OSGeoLive pre-built operating system. I have installed the addon ‘i.segment.stats’ to use with my output from ‘i.segment.uspo’.

When selecting the ‘rasters’ input for this tool, I choose the original layers that were used to create the segmented map in the first place. Upon execution of ‘i.segment.stats’, i get the following error:

Element type should be “cell” and not "raster.

The tool does not continue and outputs a blank .csv file.

Any help solving this would be much appreciated.

Kind regards

···

James Duffy
PhD Researcher
Environment and Sustainability Institute
Penryn Campus
University of Exeter
Penryn
Cornwall
TR10 9FE

2

On 18/10/16 14:27, James Duffy wrote:

Hello,

I'm using GRASS 7.0.4 on the OSGeoLive pre-built operating system. I
have installed the addon 'i.segment.stats' to use with my output from
'i.segment.uspo'.

When selecting the 'rasters' input for this tool, I choose the original
layers that were used to create the segmented map in the first place.
Upon execution of 'i.segment.stats', i get the following error:

Element type should be "cell" and not "raster.

The above message is just a warning and should not keep the module from working. I just fixed this (r69700), so try reinstalling i.segment.stats.

The tool does not continue and outputs a blank .csv file.

Any help solving this would be much appreciated.

Could you send us the command line used (you can get that by pushing the 'Copy' button in the GUI of the module or through the command history in the GUI 'command console')

Moritz

3

On 18 October 2016 at 16:17, Moritz Lennert <mlennert@club.worldonline.be>
wrote:

On 18/10/16 14:27, James Duffy wrote:

Hello,

I'm using GRASS 7.0.4 on the OSGeoLive pre-built operating system. I
have installed the addon 'i.segment.stats' to use with my output from
'i.segment.uspo'.

When selecting the 'rasters' input for this tool, I choose the original
layers that were used to create the segmented map in the first place.
Upon execution of 'i.segment.stats', i get the following error:

Element type should be "cell" and not "raster.

The above message is just a warning and should not keep the module from
working. I just fixed this (r69700), so try reinstalling i.segment.stats.

Ok thank you, have reinstalled and the message no longer appears.

The tool does not continue and outputs a blank .csv file.

Any help solving this would be much appreciated.

Could you send us the command line used (you can get that by pushing the
'Copy' button in the GUI of the module or through the command history in
the GUI 'command console')

i.segment.stats --overwrite --verbose
map=angle_seg_uspo_angle_region_1_rank1@angle1 rasters=angle_ortho.1@angle1
raster_statistics=min,max,mean,stddev,sum
csvfile=/home/jd/Wales_GRASS/isegstats_gp_test separator=comma

With this command, the output .csv is still empty apart from the headers.

Moritz

James

4

On 18/10/16 17:28, James Duffy wrote:

On 18 October 2016 at 16:17, Moritz Lennert
<mlennert@club.worldonline.be <mailto:mlennert@club.worldonline.be>> wrote:

    On 18/10/16 14:27, James Duffy wrote:

        Hello,

        I'm using GRASS 7.0.4 on the OSGeoLive pre-built operating system. I
        have installed the addon 'i.segment.stats' to use with my output
        from
        'i.segment.uspo'.

        When selecting the 'rasters' input for this tool, I choose the
        original
        layers that were used to create the segmented map in the first
        place.
        Upon execution of 'i.segment.stats', i get the following error:

        Element type should be "cell" and not "raster.

    The above message is just a warning and should not keep the module
    from working. I just fixed this (r69700), so try reinstalling
    i.segment.stats.

Ok thank you, have reinstalled and the message no longer appears.

        The tool does not continue and outputs a blank .csv file.

        Any help solving this would be much appreciated.

    Could you send us the command line used (you can get that by pushing
    the 'Copy' button in the GUI of the module or through the command
    history in the GUI 'command console')

i.segment.stats --overwrite --verbose
map=angle_seg_uspo_angle_region_1_rank1@angle1
rasters=angle_ortho.1@angle1 raster_statistics=min,max,mean,stddev,sum
csvfile=/home/jd/Wales_GRASS/isegstats_gp_test separator=comma

With this command, the output .csv is still empty apart from the headers.

Are you sure the region is set to angle_seg_uspo_angle_region_1_rank1 ? I.e.:

g.region rast=angle_seg_uspo_angle_region_1_rank1

What do

g.region -p
and
r.info angle_seg_uspo_angle_region_1_rank1

give you ?

Moritz

5

On 18 October 2016 at 16:37, Moritz Lennert <mlennert@club.worldonline.be>
wrote:

On 18/10/16 17:28, James Duffy wrote:

On 18 October 2016 at 16:17, Moritz Lennert
<mlennert@club.worldonline.be <mailto:mlennert@club.worldonline.be>>
wrote:

    On 18/10/16 14:27, James Duffy wrote:

        Hello,

        I'm using GRASS 7.0.4 on the OSGeoLive pre-built operating
system. I
        have installed the addon 'i.segment.stats' to use with my output
        from
        'i.segment.uspo'.

        When selecting the 'rasters' input for this tool, I choose the
        original
        layers that were used to create the segmented map in the first
        place.
        Upon execution of 'i.segment.stats', i get the following error:

        Element type should be "cell" and not "raster.

    The above message is just a warning and should not keep the module
    from working. I just fixed this (r69700), so try reinstalling
    i.segment.stats.

Ok thank you, have reinstalled and the message no longer appears.

        The tool does not continue and outputs a blank .csv file.

        Any help solving this would be much appreciated.

    Could you send us the command line used (you can get that by pushing
    the 'Copy' button in the GUI of the module or through the command
    history in the GUI 'command console')

i.segment.stats --overwrite --verbose
map=angle_seg_uspo_angle_region_1_rank1@angle1
rasters=angle_ortho.1@angle1 raster_statistics=min,max,mean,stddev,sum
csvfile=/home/jd/Wales_GRASS/isegstats_gp_test separator=comma

With this command, the output .csv is still empty apart from the headers.

Are you sure the region is set to angle_seg_uspo_angle_region_1_rank1 ?
I.e.:

g.region rast=angle_seg_uspo_angle_region_1_rank1

This fixed it. Sorry, I assumed that the region was already set to the
rasters that were used to create the segmented map (which are identical in
extent to the segmented map itself). Will make a note in my script to
always set the region to the input for i.segment.stats.

What do

g.region -p
and
r.info angle_seg_uspo_angle_region_1_rank1

give you ?

Thanks for your help Moritz!

Moritz

James

6

On 18/10/16 17:44, James Duffy wrote:

On 18 October 2016 at 16:37, Moritz Lennert
<mlennert@club.worldonline.be <mailto:mlennert@club.worldonline.be>> wrote:

    On 18/10/16 17:28, James Duffy wrote:

        On 18 October 2016 at 16:17, Moritz Lennert
        <mlennert@club.worldonline.be
        <mailto:mlennert@club.worldonline.be>
        <mailto:mlennert@club.worldonline.be
        <mailto:mlennert@club.worldonline.be>>> wrote:

            On 18/10/16 14:27, James Duffy wrote:

                Hello,

                I'm using GRASS 7.0.4 on the OSGeoLive pre-built
        operating system. I
                have installed the addon 'i.segment.stats' to use with
        my output
                from
                'i.segment.uspo'.

                When selecting the 'rasters' input for this tool, I
        choose the
                original
                layers that were used to create the segmented map in the
        first
                place.
                Upon execution of 'i.segment.stats', i get the following
        error:

                Element type should be "cell" and not "raster.

            The above message is just a warning and should not keep the
        module
            from working. I just fixed this (r69700), so try reinstalling
            i.segment.stats.

        Ok thank you, have reinstalled and the message no longer appears.

                The tool does not continue and outputs a blank .csv file.

                Any help solving this would be much appreciated.

            Could you send us the command line used (you can get that by
        pushing
            the 'Copy' button in the GUI of the module or through the
        command
            history in the GUI 'command console')

        i.segment.stats --overwrite --verbose
        map=angle_seg_uspo_angle_region_1_rank1@angle1
        rasters=angle_ortho.1@angle1
        raster_statistics=min,max,mean,stddev,sum
        csvfile=/home/jd/Wales_GRASS/isegstats_gp_test separator=comma

        With this command, the output .csv is still empty apart from the
        headers.

    Are you sure the region is set to
    angle_seg_uspo_angle_region_1_rank1 ? I.e.:

    g.region rast=angle_seg_uspo_angle_region_1_rank1

This fixed it. Sorry, I assumed that the region was already set to the
rasters that were used to create the segmented map (which are identical
in extent to the segmented map itself). Will make a note in my script to
always set the region to the input for i.segment.stats.

It all depends on how you used i.segment.uspo and what the region setting before running it was...

Glad you found the issue.

Moritz