Re: [GRASS-user] Problems running g.gui.gcp

[Johannes Radinger]

On Fri, Oct 23, 2015 at 10:17 AM, Moritz Lennert <
mlenn...@club.worldonline.be> wrote:

> On 22/10/15 16:25, Johannes Radinger wrote:
>
>> Dear GRASS users,
>>
>> Today I wanted to try the georectification tool g.gui.gcp in GRASS 7 for
>> the first time. I was basically following the description on the GRASS
>> wiki (https://grasswiki.osgeo.org/wiki/Georeferencing). In particular, I
>> have a photograph from my camera with known reference points which I
>> load into an unprojected XY location. My target location should also be
>> a XY location as the picture is taken from a "virtual" coordinate
>> system. Inside my target XY-location I try to open g.gui.gcp and select
>> raster, and the location and mapset where my photograph is stored. When
>> I want to click next I get following error/message: "You must select a
>> valid location and mapset in order to continue" and I can't proceed with
>> the rectification. Just this GUI message appears, no error/warning in
>> the grass console etc. I am puzzled how to interpret that? What is wrong
>> with the location/mapset? The mapset I've selected is existing (I can
>> select it from the dropdown menu). I tried to select any other
>> location/mapset but receive always the same message.
>>
>
>
> Georectification is for georeferencing to a projected system. It does not
> make sense to georeference to an XY-location.
>
> I see two options for you:
>
> - Import you image directely into the target region and use r.region to
> adjust its boundary coordinates
> - Define your own projection system to fit your needs.


So far as I understand georectification and orthorectification in
particular is to rectify a picture/photo/image based on spatially defined
ground control points which might not be done by just adjusting the
boundary coordinates. BTW I also tried the European LAEA coordinate system
(EPSG 3035) as a target location which is not working either here in my
machine/setup (same message as already mentioned). Here (
https://www.dropbox.com/s/snjzd8eu7b8115k/2015-10-22%2015.26.30.jpg?dl=0)
you can find a a photo (*.jpg) which is an "areal" photo with known 3d
coordinates for the single points (ground control points). I think this
example clarifies and illustrates what I intend to do and why the target
system can also be a XY location in my opinion. A rectification of this
image should make the lines of the grid more or less parallel. Or do I get
something completely wrong?

/Johannes



>
>
> Moritz
>
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Re: [GRASS-user] Problems running g.gui.gcp

[Anna Petrášová]

On Oct 23, 2015 6:04 AM, "Johannes Radinger" 
wrote:
>
>
>
> On Fri, Oct 23, 2015 at 11:19 AM, Moritz Lennert <
mlenn...@club.worldonline.be> wrote:
>>
>> On 23/10/15 10:56, Johannes Radinger wrote:
>>>
>>>
>>>
>>> On Fri, Oct 23, 2015 at 10:17 AM, Moritz Lennert
>>> >
wrote:
>>>
>>> On 22/10/15 16:25, Johannes Radinger wrote:
>>>
>>> Dear GRASS users,
>>>
>>> Today I wanted to try the georectification tool g.gui.gcp in
>>> GRASS 7 for
>>> the first time. I was basically following the description on the
>>> GRASS
>>> wiki (https://grasswiki.osgeo.org/wiki/Georeferencing). In
>>> particular, I
>>> have a photograph from my camera with known reference points
which I
>>> load into an unprojected XY location. My target location should
>>> also be
>>> a XY location as the picture is taken from a "virtual"
coordinate
>>> system. Inside my target XY-location I try to open g.gui.gcp and
>>> select
>>> raster, and the location and mapset where my photograph is
>>> stored. When
>>> I want to click next I get following error/message: "You must
>>> select a
>>> valid location and mapset in order to continue" and I can't
>>> proceed with
>>> the rectification. Just this GUI message appears, no
>>> error/warning in
>>> the grass console etc. I am puzzled how to interpret that? What
>>> is wrong
>>> with the location/mapset? The mapset I've selected is existing
>>> (I can
>>> select it from the dropdown menu). I tried to select any other
>>> location/mapset but receive always the same message.
>>>
>>>
>>>
>>> Georectification is for georeferencing to a projected system. It
>>> does not make sense to georeference to an XY-location.
>>>
>>> I see two options for you:
>>>
>>> - Import you image directely into the target region and use r.region
>>> to adjust its boundary coordinates
>>> - Define your own projection system to fit your needs.
>>>
>>>
>>> So far as I understand georectification and orthorectification in
>>> particular is to rectify a picture/photo/image based on spatially
>>> defined ground control points which might not be done by just adjusting
>>> the boundary coordinates. BTW I also tried the European LAEA coordinate
>>> system (EPSG 3035) as a target location which is not working either here
>>> in my machine/setup (same message as already mentioned). Here
>>> (
https://www.dropbox.com/s/snjzd8eu7b8115k/2015-10-22%2015.26.30.jpg?dl=0)
>>> you can find a a photo (*.jpg) which is an "areal" photo with known 3d
>>> coordinates for the single points (ground control points). I think this
>>> example clarifies and illustrates what I intend to do and why the target
>>> system can also be a XY location in my opinion. A rectification of this
>>> image should make the lines of the grid more or less parallel. Or do I
>>> get something completely wrong?
>>
>>
>> Actually, I was wrong: I don't get any complaint trying to use g.gui.gcp
to georectify from XY to XY. So there seems to be an issue with your XY
locations.
>>
>> Have you tried recreating the locations from scratch ?
>
>
> Your results look really reasonable that's what I was looking for...
>
> Actually, both XY locations are created from scratch (via the location
wizzard)
> I get following output for both XY locations:
>
> g.proj -p

> XY location (unprojected)
>
> I tried to start the GCP manager from within different other locations
(e.g. laea, datum: etrs89) and selecting different source location (e.g.
WGS84)however I always get the same message. So I guess this is not
specifically related to my location but rather to the GCP manager/WX GUI?
As I don't get an error message it is difficult to judge what is going
wrong in my case...
>
> I just looked up the source code and the error message seems to be
related to follwoing line:
>
https://trac.osgeo.org/grass/browser/grass/branches/releasebranch_7_0/gui/wxpython/gcp/manager.py#L399
> As far as I understand, this error message is only given if no
 location/mapset is provided; however that is not the case here. Maybe my
selection of the location/mapset via the GUI does not get parsed
further?
>
> Strange that orthorectification from one XY to antother XY location works
on other machines but not on mine.
>
> PS: As an important side note: I am working on Ubuntu which is installed
on a virtual machine (VMWare) on our server. I remotely connect to this
virtual machine via RDP

I noticed you have strange version of wxpython. Any chance you could test
on machine with version 2.8.12.0 or a stable 3 version?

Anna
>
>>
>>
>> Moritz
>
>
>
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> 

Re: [GRASS-user] Problems running g.gui.gcp

[Moritz Lennert]

On 23/10/15 10:56, Johannes Radinger wrote:



On Fri, Oct 23, 2015 at 10:17 AM, Moritz Lennert
> wrote:

On 22/10/15 16:25, Johannes Radinger wrote:

Dear GRASS users,

Today I wanted to try the georectification tool g.gui.gcp in
GRASS 7 for
the first time. I was basically following the description on the
GRASS
wiki (https://grasswiki.osgeo.org/wiki/Georeferencing). In
particular, I
have a photograph from my camera with known reference points which I
load into an unprojected XY location. My target location should
also be
a XY location as the picture is taken from a "virtual" coordinate
system. Inside my target XY-location I try to open g.gui.gcp and
select
raster, and the location and mapset where my photograph is
stored. When
I want to click next I get following error/message: "You must
select a
valid location and mapset in order to continue" and I can't
proceed with
the rectification. Just this GUI message appears, no
error/warning in
the grass console etc. I am puzzled how to interpret that? What
is wrong
with the location/mapset? The mapset I've selected is existing
(I can
select it from the dropdown menu). I tried to select any other
location/mapset but receive always the same message.



Georectification is for georeferencing to a projected system. It
does not make sense to georeference to an XY-location.

I see two options for you:

- Import you image directely into the target region and use r.region
to adjust its boundary coordinates
- Define your own projection system to fit your needs.


So far as I understand georectification and orthorectification in
particular is to rectify a picture/photo/image based on spatially
defined ground control points which might not be done by just adjusting
the boundary coordinates. BTW I also tried the European LAEA coordinate
system (EPSG 3035) as a target location which is not working either here
in my machine/setup (same message as already mentioned). Here
(https://www.dropbox.com/s/snjzd8eu7b8115k/2015-10-22%2015.26.30.jpg?dl=0)
you can find a a photo (*.jpg) which is an "areal" photo with known 3d
coordinates for the single points (ground control points). I think this
example clarifies and illustrates what I intend to do and why the target
system can also be a XY location in my opinion. A rectification of this
image should make the lines of the grid more or less parallel. Or do I
get something completely wrong?


Actually, I was wrong: I don't get any complaint trying to use g.gui.gcp 
to georectify from XY to XY. So there seems to be an issue with your XY 
locations.


Have you tried recreating the locations from scratch ?

Moritz
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Re: [GRASS-user] Problems running g.gui.gcp

[Johannes Radinger]

On Fri, Oct 23, 2015 at 11:19 AM, Moritz Lennert <
mlenn...@club.worldonline.be> wrote:

> On 23/10/15 10:56, Johannes Radinger wrote:
>
>>
>>
>> On Fri, Oct 23, 2015 at 10:17 AM, Moritz Lennert
>> >
>> wrote:
>>
>> On 22/10/15 16:25, Johannes Radinger wrote:
>>
>> Dear GRASS users,
>>
>> Today I wanted to try the georectification tool g.gui.gcp in
>> GRASS 7 for
>> the first time. I was basically following the description on the
>> GRASS
>> wiki (https://grasswiki.osgeo.org/wiki/Georeferencing). In
>> particular, I
>> have a photograph from my camera with known reference points
>> which I
>> load into an unprojected XY location. My target location should
>> also be
>> a XY location as the picture is taken from a "virtual" coordinate
>> system. Inside my target XY-location I try to open g.gui.gcp and
>> select
>> raster, and the location and mapset where my photograph is
>> stored. When
>> I want to click next I get following error/message: "You must
>> select a
>> valid location and mapset in order to continue" and I can't
>> proceed with
>> the rectification. Just this GUI message appears, no
>> error/warning in
>> the grass console etc. I am puzzled how to interpret that? What
>> is wrong
>> with the location/mapset? The mapset I've selected is existing
>> (I can
>> select it from the dropdown menu). I tried to select any other
>> location/mapset but receive always the same message.
>>
>>
>>
>> Georectification is for georeferencing to a projected system. It
>> does not make sense to georeference to an XY-location.
>>
>> I see two options for you:
>>
>> - Import you image directely into the target region and use r.region
>> to adjust its boundary coordinates
>> - Define your own projection system to fit your needs.
>>
>>
>> So far as I understand georectification and orthorectification in
>> particular is to rectify a picture/photo/image based on spatially
>> defined ground control points which might not be done by just adjusting
>> the boundary coordinates. BTW I also tried the European LAEA coordinate
>> system (EPSG 3035) as a target location which is not working either here
>> in my machine/setup (same message as already mentioned). Here
>> (https://www.dropbox.com/s/snjzd8eu7b8115k/2015-10-22%2015.26.30.jpg?dl=0
>> )
>> you can find a a photo (*.jpg) which is an "areal" photo with known 3d
>> coordinates for the single points (ground control points). I think this
>> example clarifies and illustrates what I intend to do and why the target
>> system can also be a XY location in my opinion. A rectification of this
>> image should make the lines of the grid more or less parallel. Or do I
>> get something completely wrong?
>>
>
> Actually, I was wrong: I don't get any complaint trying to use g.gui.gcp
> to georectify from XY to XY. So there seems to be an issue with your XY
> locations.
>
> Have you tried recreating the locations from scratch ?


Your results look really reasonable that's what I was looking for...

Actually, both XY locations are created from scratch (via the location
wizzard)
I get following output for both XY locations:

g.proj -p

XY location (unprojected)

I tried to start the GCP manager from within different other locations
(e.g. laea, datum: etrs89) and selecting different source location (e.g.
WGS84)however I always get the same message. So I guess this is not
specifically related to my location but rather to the GCP manager/WX GUI?
As I don't get an error message it is difficult to judge what is going
wrong in my case...

I just looked up the source code and the error message seems to be related
to follwoing line:
https://trac.osgeo.org/grass/browser/grass/branches/releasebranch_7_0/gui/wxpython/gcp/manager.py#L399
As far as I understand, this error message is only given if no
 location/mapset is provided; however that is not the case here. Maybe my
selection of the location/mapset via the GUI does not get parsed
further?

Strange that orthorectification from one XY to antother XY location works
on other machines but not on mine.

PS: As an important side note: I am working on Ubuntu which is installed on
a virtual machine (VMWare) on our server. I remotely connect to this
virtual machine via RDP.


>
> Moritz
>
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Re: [GRASS-user] Problems running g.gui.gcp

[Johannes Radinger]

On Fri, Oct 23, 2015 at 1:37 PM, Anna Petrášová 
wrote:

>
> On Oct 23, 2015 6:04 AM, "Johannes Radinger" 
> wrote:
> >
> >
> >
> > On Fri, Oct 23, 2015 at 11:19 AM, Moritz Lennert <
> mlenn...@club.worldonline.be> wrote:
> >>
> >> On 23/10/15 10:56, Johannes Radinger wrote:
> >>>
> >>>
> >>>
> >>> On Fri, Oct 23, 2015 at 10:17 AM, Moritz Lennert
> >>> >
> wrote:
> >>>
> >>> On 22/10/15 16:25, Johannes Radinger wrote:
> >>>
> >>> Dear GRASS users,
> >>>
> >>> Today I wanted to try the georectification tool g.gui.gcp in
> >>> GRASS 7 for
> >>> the first time. I was basically following the description on
> the
> >>> GRASS
> >>> wiki (https://grasswiki.osgeo.org/wiki/Georeferencing). In
> >>> particular, I
> >>> have a photograph from my camera with known reference points
> which I
> >>> load into an unprojected XY location. My target location should
> >>> also be
> >>> a XY location as the picture is taken from a "virtual"
> coordinate
> >>> system. Inside my target XY-location I try to open g.gui.gcp
> and
> >>> select
> >>> raster, and the location and mapset where my photograph is
> >>> stored. When
> >>> I want to click next I get following error/message: "You must
> >>> select a
> >>> valid location and mapset in order to continue" and I can't
> >>> proceed with
> >>> the rectification. Just this GUI message appears, no
> >>> error/warning in
> >>> the grass console etc. I am puzzled how to interpret that? What
> >>> is wrong
> >>> with the location/mapset? The mapset I've selected is existing
> >>> (I can
> >>> select it from the dropdown menu). I tried to select any other
> >>> location/mapset but receive always the same message.
> >>>
> >>>
> >>>
> >>> Georectification is for georeferencing to a projected system. It
> >>> does not make sense to georeference to an XY-location.
> >>>
> >>> I see two options for you:
> >>>
> >>> - Import you image directely into the target region and use
> r.region
> >>> to adjust its boundary coordinates
> >>> - Define your own projection system to fit your needs.
> >>>
> >>>
> >>> So far as I understand georectification and orthorectification in
> >>> particular is to rectify a picture/photo/image based on spatially
> >>> defined ground control points which might not be done by just adjusting
> >>> the boundary coordinates. BTW I also tried the European LAEA coordinate
> >>> system (EPSG 3035) as a target location which is not working either
> here
> >>> in my machine/setup (same message as already mentioned). Here
> >>> (
> https://www.dropbox.com/s/snjzd8eu7b8115k/2015-10-22%2015.26.30.jpg?dl=0)
> >>> you can find a a photo (*.jpg) which is an "areal" photo with known 3d
> >>> coordinates for the single points (ground control points). I think this
> >>> example clarifies and illustrates what I intend to do and why the
> target
> >>> system can also be a XY location in my opinion. A rectification of this
> >>> image should make the lines of the grid more or less parallel. Or do I
> >>> get something completely wrong?
> >>
> >>
> >> Actually, I was wrong: I don't get any complaint trying to use
> g.gui.gcp to georectify from XY to XY. So there seems to be an issue with
> your XY locations.
> >>
> >> Have you tried recreating the locations from scratch ?
> >
> >
> > Your results look really reasonable that's what I was looking for...
> >
> > Actually, both XY locations are created from scratch (via the location
> wizzard)
> > I get following output for both XY locations:
> >
> > g.proj -p
>
> > XY location (unprojected)
> >
> > I tried to start the GCP manager from within different other locations
> (e.g. laea, datum: etrs89) and selecting different source location (e.g.
> WGS84)however I always get the same message. So I guess this is not
> specifically related to my location but rather to the GCP manager/WX GUI?
> As I don't get an error message it is difficult to judge what is going
> wrong in my case...
> >
> > I just looked up the source code and the error message seems to be
> related to follwoing line:
> >
> https://trac.osgeo.org/grass/browser/grass/branches/releasebranch_7_0/gui/wxpython/gcp/manager.py#L399
> > As far as I understand, this error message is only given if no
>  location/mapset is provided; however that is not the case here. Maybe my
> selection of the location/mapset via the GUI does not get parsed
> further?
> >
> > Strange that orthorectification from one XY to antother XY location
> works on other machines but not on mine.
> >
> > PS: As an important side note: I am working on Ubuntu which is installed
> on a virtual machine (VMWare) on our server. I remotely connect to this

[GRASS-user] Problems running g.gui.gcp

[Johannes Radinger]

Dear GRASS users,

Today I wanted to try the georectification tool g.gui.gcp in GRASS 7 for
the first time. I was basically following the description on the GRASS wiki
(https://grasswiki.osgeo.org/wiki/Georeferencing). In particular, I have a
photograph from my camera with known reference points which I load into an
unprojected XY location. My target location should also be a XY location as
the picture is taken from a "virtual" coordinate system. Inside my target
XY-location I try to open g.gui.gcp and select raster, and the location and
mapset where my photograph is stored. When I want to click next I get
following error/message: "You must select a valid location and mapset in
order to continue" and I can't proceed with the rectification. Just this
GUI message appears, no error/warning in the grass console etc. I am
puzzled how to interpret that? What is wrong with the location/mapset? The
mapset I've selected is existing (I can select it from the dropdown menu).
I tried to select any other location/mapset but receive always the same
message.

I am running GRASS 7.0.2 on Ubuntu:
GRASS version: 7.0.2svn

GRASS SVN Revision: 66568

Build Date: 2015-10-22

Build Platform: i686-pc-linux-gnu

GDAL/OGR: 1.10.0

PROJ.4: 4.8.0

GEOS: 3.4.2

SQLite: 3.7.9

Python: 2.7.3

wxPython: 2.9.4.1

Platform: Linux-3.2.0-92-generic-pae-i686-with-Ubuntu-12.04-precise

Any ideas?
Thanks!

/Johannes
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