[GRASS-user] dilation & erosion (mathematical morphology)

GRASS GRASS user
1

Hi there,

looking at some noisy raster map, I would like to clean up the patches (map
consists only of one class and NULL) using basic mathematical morphology
(dilation & erosion) in GRASS 7.0.

The dilation can easily be achieved with r.grow.
But the erosion seems not to be as straight forward.

Since the example about shrinking was removed from the help page of r.grow in
GRASS 7.0 (http://grass.osgeo.org/grass70/manuals/r.grow.html), I hoped for an
easier way to carry out the erosion. Looking in vain for a raster command
named shrink or erode, I tried a negative distance in r.buffer (-> error) and
negative radius in r.grow (treated as absolute value).

The following produce identical output with grown patches.
  r.grow in=mod_10_33 out=mod_10_33_1 radius=1.1
  r.grow in=mod_10_33 out=mod_10_33_2 radius=-1.1

Any suggestions for a quick erosion?

thanks
  Robert

2

Check out the r.growth.shrink addon.

···

On Thu, Feb 5, 2015 at 1:59 PM, Robert Nuske <rnuske@gwdg.de> wrote:

Hi there,

looking at some noisy raster map, I would like to clean up the patches (map
consists only of one class and NULL) using basic mathematical morphology
(dilation & erosion) in GRASS 7.0.

The dilation can easily be achieved with r.grow.
But the erosion seems not to be as straight forward.

Since the example about shrinking was removed from the help page of r.grow in
GRASS 7.0 (http://grass.osgeo.org/grass70/manuals/r.grow.html), I hoped for an
easier way to carry out the erosion. Looking in vain for a raster command
named shrink or erode, I tried a negative distance in r.buffer (-> error) and
negative radius in r.grow (treated as absolute value).

The following produce identical output with grown patches.
r.grow in=mod_10_33 out=mod_10_33_1 radius=1.1
r.grow in=mod_10_33 out=mod_10_33_2 radius=-1.1

Any suggestions for a quick erosion?

thanks
Robert

grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

3

Hi Paulo,

thanks for the hint!

Now I have some trouble to install the addon:

As a standard user I am not allowed to create a directory under /usr/lib.
A second try as root failed because HTML2MAN within "Grass.make" tries to call
$(GISBASE)/tools/g.html2man.py. But the python script is called g.html2man.
After linking g.html2man.py to g.html2man the built of the addon fails because
of a missing python module (ImportError: No module named html).

This was on ubuntu 14.04 with grass70 from the ppa:grass-devel.
Version 7.0.0+1svn64464~ubuntu14.04.1 installed today.

Are addons supposed to be installed by standard users?

thanks
  robert

as standard user:
-----------------------------------------------------------
GRASS 7.0.0 (wgs84):~ > g.extension extension=r.grow.shrink
svnurl=http://svn.osgeo.org/grass/grass-addons/grass7 --verbose
Fetching <r.grow.shrink> from GRASS-Addons SVN repository (be patient)...
A r.grow.shrink/DEPRECATED
A r.grow.shrink/main.c
A r.grow.shrink/Makefile
A r.grow.shrink/r.grow.shrink.html
U r.grow.shrink
Checked out revision 64471.
Compiling...
mkdir -p /tmp/tmpGP17FI/r.grow.shrink/bin
mkdir -p /tmp/tmpGP17FI/r.grow.shrink/etc
mkdir -p /tmp/tmpGP17FI/r.grow.shrink/docs/html
mkdir -p /usr/lib/grass70/docs/man
mkdir: cannot create directory '/usr/lib/grass70/docs/man': Permission denied
make: *** [/usr/lib/grass70/docs/man] Error 1
ERROR: Compilation failed, sorry. Please check above error messages.

as root (sudo -i):
-----------------------------------------------------------
GRASS 7.0.0 (wgs84):~ > g.extension extension=r.grow.shrink
svnurl=http://svn.osgeo.org/grass/grass-addons/grass7 --verbose
Fetching <r.grow.shrink> from GRASS-Addons SVN repository (be patient)...
A r.grow.shrink/DEPRECATED
A r.grow.shrink/main.c
A r.grow.shrink/Makefile
A r.grow.shrink/r.grow.shrink.html
U r.grow.shrink
Checked out revision 64471.
Compiling...
mkdir -p /tmp/tmpa27tYO/r.grow.shrink/bin
mkdir -p /tmp/tmpa27tYO/r.grow.shrink/etc
mkdir -p /tmp/tmpa27tYO/r.grow.shrink/docs/html
mkdir -p /usr/lib/grass70/docs/man
mkdir -p /tmp/tmpa27tYO/r.grow.shrink/docs/man/man1
test -d OBJ.x86_64-pc-linux-gnu || mkdir -p OBJ.x86_64-pc-linux-gnu
gcc -Wall -g -O -I/usr/lib/grass70/include -I/usr/lib/grass70/include -
DPACKAGE=\""grassmods"\" -I/usr/lib/grass70/include -
I/usr/lib/grass70/include -DRELDIR=\"/tmp/tmpa27tYO/r.grow.shrink\" -o
OBJ.x86_64-pc-linux-gnu/main.o -c main.c
: && gcc -L/usr/lib/grass70/lib -L/usr/lib/grass70/lib -Wl,--export-dynamic -
Wl,-rpath-link,/usr/lib/grass70/lib -o
/tmp/tmpa27tYO/r.grow.shrink/bin/r.grow.shrink OBJ.x86_64-pc-linux-gnu/main.o
-lgrass_gis.7.0.0svn -lgrass_raster.7.0.0svn -lm
if [ "/tmp/tmpa27tYO/r.grow.shrink/bin/r.grow.shrink" != "" ] ; then
GISRC=/tmp/grass7-root-12200/gisrc GISBASE=/usr/lib/grass70
PATH="/usr/lib/grass70/bin:/usr/lib/grass70/bin:/usr/lib/grass70/scripts:
$PATH" PYTHONPATH="/usr/lib/grass70/etc/python:/usr/lib/grass70/gui/wxpython:
$PYTHONPATH"
LD_LIBRARY_PATH="/tmp/tmpa27tYO/r.grow.shrink/bin:/usr/lib/grass70/scripts:/usr/lib/grass70/lib:/usr/lib/grass70/lib:/usr/lib/grass70/lib"
LC_ALL=C /tmp/tmpa27tYO/r.grow.shrink/bin/r.grow.shrink --html-description <
/dev/null | grep -v '</body>\|</html>' > r.grow.shrink.tmp.html ; fi
VERSION_NUMBER=7.0.0svn VERSION_DATE=2015 \
        python /usr/lib/grass70/tools/mkhtml.py r.grow.shrink >
/tmp/tmpa27tYO/r.grow.shrink/docs/html/r.grow.shrink.html
VERSION_NUMBER=7.0.0svn /usr/lib/grass70/tools/g.html2man.py
/tmp/tmpa27tYO/r.grow.shrink/docs/html/r.grow.shrink.html
/tmp/tmpa27tYO/r.grow.shrink/docs/man/man1/r.grow.shrink.1
/bin/sh: 1: /usr/lib/grass70/tools/g.html2man.py: not found
make: *** [/tmp/tmpa27tYO/r.grow.shrink/docs/man/man1/r.grow.shrink.1] Error
127
rm r.grow.shrink.tmp.html
ERROR: Compilation failed, sorry. Please check above error messages.

Am Donnerstag, 5. Februar 2015, 14:53:05 schrieb Paulo van Breugel:

Check out the r.growth.shrink addon.

On Thu, Feb 5, 2015 at 1:59 PM, Robert Nuske <rnuske@gwdg.de> wrote:
> Hi there,
>
> looking at some noisy raster map, I would like to clean up the patches
> (map
> consists only of one class and NULL) using basic mathematical morphology
> (dilation & erosion) in GRASS 7.0.
>
>
> The dilation can easily be achieved with r.grow.
> But the erosion seems not to be as straight forward.
>
> Since the example about shrinking was removed from the help page of r.grow
> in
> GRASS 7.0 (http://grass.osgeo.org/grass70/manuals/r.grow.html), I hoped
> for an
> easier way to carry out the erosion. Looking in vain for a raster command
> named shrink or erode, I tried a negative distance in r.buffer (-> error)
> and
> negative radius in r.grow (treated as absolute value).
>
> The following produce identical output with grown patches.
>
> r.grow in=mod_10_33 out=mod_10_33_1 radius=1.1
> r.grow in=mod_10_33 out=mod_10_33_2 radius=-1.1
>
> Any suggestions for a quick erosion?
>
>
> thanks
>
> Robert
>
> _______________________________________________
> grass-user mailing list
> grass-user@lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user

4

you should be able to install the addon from within GRASS using g.extension or via the menu (settings - addon extensions). If you mean with ‘standard user’ an user without administrative privileges, then yes, I think you should be able to install the addons, they are normally installed in a hidden folder (.grass7) in the home folder.

···

On Thu, Feb 5, 2015 at 3:52 PM, Robert Nuske <rnuske@gwdg.de> wrote:

Hi Paulo,

thanks for the hint!

Now I have some trouble to install the addon:

As a standard user I am not allowed to create a directory under /usr/lib.
A second try as root failed because HTML2MAN within “Grass.make” tries to call
$(GISBASE)/tools/g.html2man.py. But the python script is called g.html2man.
After linking g.html2man.py to g.html2man the built of the addon fails because
of a missing python module (ImportError: No module named html).

This was on ubuntu 14.04 with grass70 from the ppa:grass-devel.
Version 7.0.0+1svn64464~ubuntu14.04.1 installed today.

Are addons supposed to be installed by standard users?

thanks
robert

as standard user:

GRASS 7.0.0 (wgs84):~ > g.extension extension=r.grow.shrink
svnurl=http://svn.osgeo.org/grass/grass-addons/grass7 --verbose
Fetching <r.grow.shrink> from GRASS-Addons SVN repository (be patient)…
A r.grow.shrink/DEPRECATED
A r.grow.shrink/main.c
A r.grow.shrink/Makefile
A r.grow.shrink/r.grow.shrink.html
U r.grow.shrink
Checked out revision 64471.
Compiling…
mkdir -p /tmp/tmpGP17FI/r.grow.shrink/bin
mkdir -p /tmp/tmpGP17FI/r.grow.shrink/etc
mkdir -p /tmp/tmpGP17FI/r.grow.shrink/docs/html
mkdir -p /usr/lib/grass70/docs/man
mkdir: cannot create directory ‘/usr/lib/grass70/docs/man’: Permission denied
make: *** [/usr/lib/grass70/docs/man] Error 1
ERROR: Compilation failed, sorry. Please check above error messages.

as root (sudo -i):

GRASS 7.0.0 (wgs84):~ > g.extension extension=r.grow.shrink
svnurl=http://svn.osgeo.org/grass/grass-addons/grass7 --verbose
Fetching <r.grow.shrink> from GRASS-Addons SVN repository (be patient)…
A r.grow.shrink/DEPRECATED
A r.grow.shrink/main.c
A r.grow.shrink/Makefile
A r.grow.shrink/r.grow.shrink.html
U r.grow.shrink
Checked out revision 64471.
Compiling…
mkdir -p /tmp/tmpa27tYO/r.grow.shrink/bin
mkdir -p /tmp/tmpa27tYO/r.grow.shrink/etc
mkdir -p /tmp/tmpa27tYO/r.grow.shrink/docs/html
mkdir -p /usr/lib/grass70/docs/man
mkdir -p /tmp/tmpa27tYO/r.grow.shrink/docs/man/man1
test -d OBJ.x86_64-pc-linux-gnu || mkdir -p OBJ.x86_64-pc-linux-gnu
gcc -Wall -g -O -I/usr/lib/grass70/include -I/usr/lib/grass70/include -
DPACKAGE="“grassmods”" -I/usr/lib/grass70/include -
I/usr/lib/grass70/include -DRELDIR="/tmp/tmpa27tYO/r.grow.shrink" -o
OBJ.x86_64-pc-linux-gnu/main.o -c main.c
: && gcc -L/usr/lib/grass70/lib -L/usr/lib/grass70/lib -Wl,–export-dynamic -
Wl,-rpath-link,/usr/lib/grass70/lib -o
/tmp/tmpa27tYO/r.grow.shrink/bin/r.grow.shrink OBJ.x86_64-pc-linux-gnu/main.o
-lgrass_gis.7.0.0svn -lgrass_raster.7.0.0svn -lm
if [ “/tmp/tmpa27tYO/r.grow.shrink/bin/r.grow.shrink” != “” ] ; then
GISRC=/tmp/grass7-root-12200/gisrc GISBASE=/usr/lib/grass70
PATH=“/usr/lib/grass70/bin:/usr/lib/grass70/bin:/usr/lib/grass70/scripts:
$PATH” PYTHONPATH=“/usr/lib/grass70/etc/python:/usr/lib/grass70/gui/wxpython:
$PYTHONPATH”
LD_LIBRARY_PATH=“/tmp/tmpa27tYO/r.grow.shrink/bin:/usr/lib/grass70/scripts:/usr/lib/grass70/lib:/usr/lib/grass70/lib:/usr/lib/grass70/lib”
LC_ALL=C /tmp/tmpa27tYO/r.grow.shrink/bin/r.grow.shrink --html-description <
/dev/null | grep -v ‘|’ > r.grow.shrink.tmp.html ; fi
VERSION_NUMBER=7.0.0svn VERSION_DATE=2015
python /usr/lib/grass70/tools/mkhtml.py r.grow.shrink >
/tmp/tmpa27tYO/r.grow.shrink/docs/html/r.grow.shrink.html
VERSION_NUMBER=7.0.0svn /usr/lib/grass70/tools/g.html2man.py
/tmp/tmpa27tYO/r.grow.shrink/docs/html/r.grow.shrink.html
/tmp/tmpa27tYO/r.grow.shrink/docs/man/man1/r.grow.shrink.1
/bin/sh: 1: /usr/lib/grass70/tools/g.html2man.py: not found
make: *** [/tmp/tmpa27tYO/r.grow.shrink/docs/man/man1/r.grow.shrink.1] Error
127
rm r.grow.shrink.tmp.html
ERROR: Compilation failed, sorry. Please check above error messages.

Am Donnerstag, 5. Februar 2015, 14:53:05 schrieb Paulo van Breugel:

Check out the r.growth.shrink addon.

On Thu, Feb 5, 2015 at 1:59 PM, Robert Nuske <rnuske@gwdg.de> wrote:

Hi there,

looking at some noisy raster map, I would like to clean up the patches
(map
consists only of one class and NULL) using basic mathematical morphology
(dilation & erosion) in GRASS 7.0.

The dilation can easily be achieved with r.grow.
But the erosion seems not to be as straight forward.

Since the example about shrinking was removed from the help page of r.grow
in
GRASS 7.0 (http://grass.osgeo.org/grass70/manuals/r.grow.html), I hoped
for an
easier way to carry out the erosion. Looking in vain for a raster command
named shrink or erode, I tried a negative distance in r.buffer (-> error)
and
negative radius in r.grow (treated as absolute value).

The following produce identical output with grown patches.

r.grow in=mod_10_33 out=mod_10_33_1 radius=1.1
r.grow in=mod_10_33 out=mod_10_33_2 radius=-1.1

Any suggestions for a quick erosion?

thanks

Robert

grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

5

hmm, that's what I hoped and what doesn't work

Which leaves the question open whether it is me, the ubuntu package or the svn
version (at or before changeset 64464) who causes the problem.

thanks
  robert

Am Donnerstag, 5. Februar 2015, 16:15:02 schrieb Paulo van Breugel:

you should be able to install the addon from within GRASS using g.extension
or via the menu (settings - addon extensions). If you mean with 'standard
user' an user without administrative privileges, then yes, I think you
should be able to install the addons, they are normally installed in a
hidden folder (.grass7) in the home folder.

On Thu, Feb 5, 2015 at 3:52 PM, Robert Nuske <rnuske@gwdg.de> wrote:
> Hi Paulo,
>
> thanks for the hint!
>
>
> Now I have some trouble to install the addon:
>
> As a standard user I am not allowed to create a directory under /usr/lib.
> A second try as root failed because HTML2MAN within "Grass.make" tries to
> call
> $(GISBASE)/tools/g.html2man.py. But the python script is called
> g.html2man.
> After linking g.html2man.py to g.html2man the built of the addon fails
> because
> of a missing python module (ImportError: No module named html).
>
>
> This was on ubuntu 14.04 with grass70 from the ppa:grass-devel.
> Version 7.0.0+1svn64464~ubuntu14.04.1 installed today.
>
>
>
> Are addons supposed to be installed by standard users?
>
>
> thanks
>
> robert
>
> as standard user:
> -----------------------------------------------------------
> GRASS 7.0.0 (wgs84):~ > g.extension extension=r.grow.shrink
> svnurl=http://svn.osgeo.org/grass/grass-addons/grass7 --verbose
> Fetching <r.grow.shrink> from GRASS-Addons SVN repository (be patient)...
> A r.grow.shrink/DEPRECATED
> A r.grow.shrink/main.c
> A r.grow.shrink/Makefile
> A r.grow.shrink/r.grow.shrink.html
>
> U r.grow.shrink
>
> Checked out revision 64471.
> Compiling...
> mkdir -p /tmp/tmpGP17FI/r.grow.shrink/bin
> mkdir -p /tmp/tmpGP17FI/r.grow.shrink/etc
> mkdir -p /tmp/tmpGP17FI/r.grow.shrink/docs/html
> mkdir -p /usr/lib/grass70/docs/man
> mkdir: cannot create directory '/usr/lib/grass70/docs/man': Permission
> denied
> make: *** [/usr/lib/grass70/docs/man] Error 1
> ERROR: Compilation failed, sorry. Please check above error messages.
>
>
> as root (sudo -i):
> -----------------------------------------------------------
> GRASS 7.0.0 (wgs84):~ > g.extension extension=r.grow.shrink
> svnurl=http://svn.osgeo.org/grass/grass-addons/grass7 --verbose
> Fetching <r.grow.shrink> from GRASS-Addons SVN repository (be patient)...
> A r.grow.shrink/DEPRECATED
> A r.grow.shrink/main.c
> A r.grow.shrink/Makefile
> A r.grow.shrink/r.grow.shrink.html
>
> U r.grow.shrink
>
> Checked out revision 64471.
> Compiling...
> mkdir -p /tmp/tmpa27tYO/r.grow.shrink/bin
> mkdir -p /tmp/tmpa27tYO/r.grow.shrink/etc
> mkdir -p /tmp/tmpa27tYO/r.grow.shrink/docs/html
> mkdir -p /usr/lib/grass70/docs/man
> mkdir -p /tmp/tmpa27tYO/r.grow.shrink/docs/man/man1
> test -d OBJ.x86_64-pc-linux-gnu || mkdir -p OBJ.x86_64-pc-linux-gnu
> gcc -Wall -g -O -I/usr/lib/grass70/include -I/usr/lib/grass70/include
>
> -
>
> DPACKAGE=\""grassmods"\" -I/usr/lib/grass70/include -
> I/usr/lib/grass70/include -DRELDIR=\"/tmp/tmpa27tYO/r.grow.shrink\" -o
> OBJ.x86_64-pc-linux-gnu/main.o -c main.c
>
> : && gcc -L/usr/lib/grass70/lib -L/usr/lib/grass70/lib
>
> -Wl,--export-dynamic -
> Wl,-rpath-link,/usr/lib/grass70/lib -o
> /tmp/tmpa27tYO/r.grow.shrink/bin/r.grow.shrink
> OBJ.x86_64-pc-linux-gnu/main.o
> -lgrass_gis.7.0.0svn -lgrass_raster.7.0.0svn -lm
> if [ "/tmp/tmpa27tYO/r.grow.shrink/bin/r.grow.shrink" != "" ] ; then
> GISRC=/tmp/grass7-root-12200/gisrc GISBASE=/usr/lib/grass70
> PATH="/usr/lib/grass70/bin:/usr/lib/grass70/bin:/usr/lib/grass70/scripts:
> $PATH"
> PYTHONPATH="/usr/lib/grass70/etc/python:/usr/lib/grass70/gui/wxpython:
> $PYTHONPATH"
>
> LD_LIBRARY_PATH="/tmp/tmpa27tYO/r.grow.shrink/bin:/usr/lib/grass70/scripts
> :/usr/lib/grass70/lib:/usr/lib/grass70/lib:/usr/lib/grass70/lib" LC_ALL=C
> /tmp/tmpa27tYO/r.grow.shrink/bin/r.grow.shrink --html-description <
> /dev/null | grep -v '</body>\|</html>' > r.grow.shrink.tmp.html ; fi
> VERSION_NUMBER=7.0.0svn VERSION_DATE=2015 \
>
> python /usr/lib/grass70/tools/mkhtml.py r.grow.shrink >
>
> /tmp/tmpa27tYO/r.grow.shrink/docs/html/r.grow.shrink.html
> VERSION_NUMBER=7.0.0svn /usr/lib/grass70/tools/g.html2man.py
> /tmp/tmpa27tYO/r.grow.shrink/docs/html/r.grow.shrink.html
> /tmp/tmpa27tYO/r.grow.shrink/docs/man/man1/r.grow.shrink.1
> /bin/sh: 1: /usr/lib/grass70/tools/g.html2man.py: not found
> make: *** [/tmp/tmpa27tYO/r.grow.shrink/docs/man/man1/r.grow.shrink.1]
> Error
> 127
> rm r.grow.shrink.tmp.html
> ERROR: Compilation failed, sorry. Please check above error messages.
>
> Am Donnerstag, 5. Februar 2015, 14:53:05 schrieb Paulo van Breugel:
> > Check out the r.growth.shrink addon.
> >
> > On Thu, Feb 5, 2015 at 1:59 PM, Robert Nuske <rnuske@gwdg.de> wrote:
> > > Hi there,
> > >
> > > looking at some noisy raster map, I would like to clean up the patches
> > > (map
> > > consists only of one class and NULL) using basic mathematical
>
> morphology
>
> > > (dilation & erosion) in GRASS 7.0.
> > >
> > >
> > > The dilation can easily be achieved with r.grow.
> > > But the erosion seems not to be as straight forward.
> > >
> > > Since the example about shrinking was removed from the help page of
>
> r.grow
>
> > > in
> > > GRASS 7.0 (http://grass.osgeo.org/grass70/manuals/r.grow.html), I
>
> hoped
>
> > > for an
> > > easier way to carry out the erosion. Looking in vain for a raster
>
> command
>
> > > named shrink or erode, I tried a negative distance in r.buffer (->
>
> error)
>
> > > and
> > > negative radius in r.grow (treated as absolute value).
> > >
> > > The following produce identical output with grown patches.
> > >
> > > r.grow in=mod_10_33 out=mod_10_33_1 radius=1.1
> > > r.grow in=mod_10_33 out=mod_10_33_2 radius=-1.1
> > >
> > > Any suggestions for a quick erosion?
> > >
> > >
> > > thanks
> > >
> > > Robert
> > >
> > > _______________________________________________
> > > grass-user mailing list
> > > grass-user@lists.osgeo.org
> > > http://lists.osgeo.org/mailman/listinfo/grass-user

6

I have svn revision r64291, and for me it works fine

···

On Thu, Feb 5, 2015 at 4:46 PM, Robert Nuske <rnuske@gwdg.de> wrote:

hmm, that’s what I hoped and what doesn’t work

Which leaves the question open whether it is me, the ubuntu package or the svn
version (at or before changeset 64464) who causes the problem.

thanks
robert

Am Donnerstag, 5. Februar 2015, 16:15:02 schrieb Paulo van Breugel:

you should be able to install the addon from within GRASS using g.extension
or via the menu (settings - addon extensions). If you mean with ‘standard
user’ an user without administrative privileges, then yes, I think you
should be able to install the addons, they are normally installed in a
hidden folder (.grass7) in the home folder.

On Thu, Feb 5, 2015 at 3:52 PM, Robert Nuske <rnuske@gwdg.de> wrote:

Hi Paulo,

thanks for the hint!

Now I have some trouble to install the addon:

As a standard user I am not allowed to create a directory under /usr/lib.
A second try as root failed because HTML2MAN within “Grass.make” tries to
call
$(GISBASE)/tools/g.html2man.py. But the python script is called
g.html2man.
After linking g.html2man.py to g.html2man the built of the addon fails
because
of a missing python module (ImportError: No module named html).

This was on ubuntu 14.04 with grass70 from the ppa:grass-devel.
Version 7.0.0+1svn64464~ubuntu14.04.1 installed today.

Are addons supposed to be installed by standard users?

thanks

robert

as standard user:

GRASS 7.0.0 (wgs84):~ > g.extension extension=r.grow.shrink
svnurl=http://svn.osgeo.org/grass/grass-addons/grass7 --verbose
Fetching <r.grow.shrink> from GRASS-Addons SVN repository (be patient)…
A r.grow.shrink/DEPRECATED
A r.grow.shrink/main.c
A r.grow.shrink/Makefile
A r.grow.shrink/r.grow.shrink.html

U r.grow.shrink

Checked out revision 64471.
Compiling…
mkdir -p /tmp/tmpGP17FI/r.grow.shrink/bin
mkdir -p /tmp/tmpGP17FI/r.grow.shrink/etc
mkdir -p /tmp/tmpGP17FI/r.grow.shrink/docs/html
mkdir -p /usr/lib/grass70/docs/man
mkdir: cannot create directory ‘/usr/lib/grass70/docs/man’: Permission
denied
make: *** [/usr/lib/grass70/docs/man] Error 1
ERROR: Compilation failed, sorry. Please check above error messages.

as root (sudo -i):

GRASS 7.0.0 (wgs84):~ > g.extension extension=r.grow.shrink
svnurl=http://svn.osgeo.org/grass/grass-addons/grass7 --verbose
Fetching <r.grow.shrink> from GRASS-Addons SVN repository (be patient)…
A r.grow.shrink/DEPRECATED
A r.grow.shrink/main.c
A r.grow.shrink/Makefile
A r.grow.shrink/r.grow.shrink.html

U r.grow.shrink

Checked out revision 64471.
Compiling…
mkdir -p /tmp/tmpa27tYO/r.grow.shrink/bin
mkdir -p /tmp/tmpa27tYO/r.grow.shrink/etc
mkdir -p /tmp/tmpa27tYO/r.grow.shrink/docs/html
mkdir -p /usr/lib/grass70/docs/man
mkdir -p /tmp/tmpa27tYO/r.grow.shrink/docs/man/man1
test -d OBJ.x86_64-pc-linux-gnu || mkdir -p OBJ.x86_64-pc-linux-gnu
gcc -Wall -g -O -I/usr/lib/grass70/include -I/usr/lib/grass70/include

DPACKAGE="“grassmods”" -I/usr/lib/grass70/include -
I/usr/lib/grass70/include -DRELDIR="/tmp/tmpa27tYO/r.grow.shrink" -o
OBJ.x86_64-pc-linux-gnu/main.o -c main.c

: && gcc -L/usr/lib/grass70/lib -L/usr/lib/grass70/lib

-Wl,–export-dynamic -
Wl,-rpath-link,/usr/lib/grass70/lib -o
/tmp/tmpa27tYO/r.grow.shrink/bin/r.grow.shrink
OBJ.x86_64-pc-linux-gnu/main.o
-lgrass_gis.7.0.0svn -lgrass_raster.7.0.0svn -lm
if [ “/tmp/tmpa27tYO/r.grow.shrink/bin/r.grow.shrink” != “” ] ; then
GISRC=/tmp/grass7-root-12200/gisrc GISBASE=/usr/lib/grass70
PATH=“/usr/lib/grass70/bin:/usr/lib/grass70/bin:/usr/lib/grass70/scripts:
$PATH”
PYTHONPATH=“/usr/lib/grass70/etc/python:/usr/lib/grass70/gui/wxpython:
$PYTHONPATH”

LD_LIBRARY_PATH=“/tmp/tmpa27tYO/r.grow.shrink/bin:/usr/lib/grass70/scripts
:/usr/lib/grass70/lib:/usr/lib/grass70/lib:/usr/lib/grass70/lib” LC_ALL=C
/tmp/tmpa27tYO/r.grow.shrink/bin/r.grow.shrink --html-description <
/dev/null | grep -v ‘|’ > r.grow.shrink.tmp.html ; fi
VERSION_NUMBER=7.0.0svn VERSION_DATE=2015 \

python /usr/lib/grass70/tools/mkhtml.py r.grow.shrink >

/tmp/tmpa27tYO/r.grow.shrink/docs/html/r.grow.shrink.html
VERSION_NUMBER=7.0.0svn /usr/lib/grass70/tools/g.html2man.py
/tmp/tmpa27tYO/r.grow.shrink/docs/html/r.grow.shrink.html
/tmp/tmpa27tYO/r.grow.shrink/docs/man/man1/r.grow.shrink.1
/bin/sh: 1: /usr/lib/grass70/tools/g.html2man.py: not found
make: *** [/tmp/tmpa27tYO/r.grow.shrink/docs/man/man1/r.grow.shrink.1]
Error
127
rm r.grow.shrink.tmp.html
ERROR: Compilation failed, sorry. Please check above error messages.

Am Donnerstag, 5. Februar 2015, 14:53:05 schrieb Paulo van Breugel:

Check out the r.growth.shrink addon.

On Thu, Feb 5, 2015 at 1:59 PM, Robert Nuske <rnuske@gwdg.de> wrote:

Hi there,

looking at some noisy raster map, I would like to clean up the patches
(map
consists only of one class and NULL) using basic mathematical

morphology

(dilation & erosion) in GRASS 7.0.

The dilation can easily be achieved with r.grow.
But the erosion seems not to be as straight forward.

Since the example about shrinking was removed from the help page of

r.grow

in
GRASS 7.0 (http://grass.osgeo.org/grass70/manuals/r.grow.html), I

hoped

for an
easier way to carry out the erosion. Looking in vain for a raster

command

named shrink or erode, I tried a negative distance in r.buffer (->

error)

and
negative radius in r.grow (treated as absolute value).

The following produce identical output with grown patches.

r.grow in=mod_10_33 out=mod_10_33_1 radius=1.1
r.grow in=mod_10_33 out=mod_10_33_2 radius=-1.1

Any suggestions for a quick erosion?

thanks

Robert

grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

7

On Thu, Feb 5, 2015 at 2:53 PM, Paulo van Breugel
<p.vanbreugel@gmail.com> wrote:

Check out the r.growth.shrink addon.

See also ticket #2368 [0] which includes a patch for r.grow.distance
to shrink (distance from nearest NULL cell to be precise).

Markus M

https://trac.osgeo.org/grass/ticket/2368

On Thu, Feb 5, 2015 at 1:59 PM, Robert Nuske <rnuske@gwdg.de> wrote:

Hi there,

looking at some noisy raster map, I would like to clean up the patches
(map
consists only of one class and NULL) using basic mathematical morphology
(dilation & erosion) in GRASS 7.0.

The dilation can easily be achieved with r.grow.
But the erosion seems not to be as straight forward.

Since the example about shrinking was removed from the help page of r.grow
in
GRASS 7.0 (http://grass.osgeo.org/grass70/manuals/r.grow.html), I hoped
for an
easier way to carry out the erosion. Looking in vain for a raster command
named shrink or erode, I tried a negative distance in r.buffer (-> error)
and
negative radius in r.grow (treated as absolute value).

The following produce identical output with grown patches.
  r.grow in=mod_10_33 out=mod_10_33_1 radius=1.1
  r.grow in=mod_10_33 out=mod_10_33_2 radius=-1.1

Any suggestions for a quick erosion?

thanks
  Robert
_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

_______________________________________________
grass-user mailing list
grass-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/grass-user

8

Hi Markus,

is there a chance that this patch (or r.grow shrinking patches if radius is
negative) will land in relbr70?

cheers,
  robert

On Thursday 05 February 2015 22:13:32 Markus Metz wrote:

On Thu, Feb 5, 2015 at 2:53 PM, Paulo van Breugel

<p.vanbreugel@gmail.com> wrote:
> Check out the r.growth.shrink addon.

See also ticket #2368 [0] which includes a patch for r.grow.distance
to shrink (distance from nearest NULL cell to be precise).

Markus M

https://trac.osgeo.org/grass/ticket/2368

> On Thu, Feb 5, 2015 at 1:59 PM, Robert Nuske <rnuske@gwdg.de> wrote:
>> Hi there,
>>
>> looking at some noisy raster map, I would like to clean up the patches
>> (map
>> consists only of one class and NULL) using basic mathematical morphology
>> (dilation & erosion) in GRASS 7.0.
>>
>>
>> The dilation can easily be achieved with r.grow.
>> But the erosion seems not to be as straight forward.
>>
>> Since the example about shrinking was removed from the help page of
>> r.grow
>> in
>> GRASS 7.0 (http://grass.osgeo.org/grass70/manuals/r.grow.html), I hoped
>> for an
>> easier way to carry out the erosion. Looking in vain for a raster command
>> named shrink or erode, I tried a negative distance in r.buffer (-> error)
>> and
>> negative radius in r.grow (treated as absolute value).
>>
>> The following produce identical output with grown patches.
>>
>> r.grow in=mod_10_33 out=mod_10_33_1 radius=1.1
>> r.grow in=mod_10_33 out=mod_10_33_2 radius=-1.1
>>
>> Any suggestions for a quick erosion?
>>
>>
>> thanks
>>
>> Robert
>>
>> _______________________________________________
>> grass-user mailing list
>> grass-user@lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/grass-user
>
> _______________________________________________
> grass-user mailing list
> grass-user@lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user