[Qgis-user] Undo-command in Edit-session

[Marco Lechner - FOSSGIS e . V .]

Is there an Undo-command while using the edit-tools (for shapaes) of QGIS?
I couldn't find a button and Ctrl-Z doesn't seem to work. There must be a
way to Undo if I moved a lot of objects but my last move was wrong (and of
course i didn't save my edits after each single move.

Marco
-- 
FOSSGIS e.V.
Marco Lechner
http://www.fossgis.de
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AW: [Qgis-user] Undo-command in Edit-session

[Hugentobler Marco]

Hi Marco

No, there is no undo command in the edit tools (not even in QGIS at all). I 
know that undo would be very handy, but the only way up to now is to regularly 
save.

Regards,
Marco


-Ursprüngliche Nachricht-
Von: qgis-user-boun...@lists.osgeo.org im Auftrag von Marco Lechner - FOSSGIS 
e.V.
Gesendet: Di 03.03.2009 11:27
An: qgis-user@lists.osgeo.org
Betreff: [Qgis-user] Undo-command in Edit-session
 

Is there an Undo-command while using the edit-tools (for shapaes) of QGIS?
I couldn't find a button and Ctrl-Z doesn't seem to work. There must be a
way to Undo if I moved a lot of objects but my last move was wrong (and of
course i didn't save my edits after each single move.

Marco
-- 
FOSSGIS e.V.
Marco Lechner
http://www.fossgis.de
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RE: [Qgis-user] [Fwd: Problem at starting QGIS and at uninstallingthrough osgeo4w-setup]

[Gavin Fleming]

Seems to be related to Agus' problem: 

I downloaded the 'CD equivalent' from 
http://trac.osgeo.org/osgeo4w/wiki/InstallFromCD and have run the install 
locally, choosing QGIS and related plugins.

Several dependencies weren't automatically selected (GEOS, proj4, etc) so I 
went back and manually selected and installed them. However, it's now not able 
to find "proj_fw.dll" which is not evident anywhere in the install package. 
(The proj4 pakage is installed). So my install process has come to a halt. 

Also, from the package names it appears that it's still only QGIS 1 preview 2 
that's in OSGeo4W. Or is it the full QGIS 1.0?

thanks

Gavin Fleming 
 

 Original Message 
Subject: Problem at starting QGIS and at uninstalling through osgeo4w-setup
Date: Sun, 01 Mar 2009 11:58:13 +0100
From: Agustin Lobo 
Reply-To: agustin.l...@ija.csic.es
To: osgeo4w-...@lists.osgeo.org

Hi!

After around 30 installations of QGIS using osgeo4w
according to directions in:
http://sites.google.com/site/eospansite/qsig-for-windows
(please notify of any improvements that should be done)

I've found only 1 case with a major problem (Win XP machine)
and I would most appreciate your help.

At starting QGIS, the following message is displayed and the program
does not start:
"Error at starting the program because jpeg_osgeo.dll could not be
found. Reinstaling the program could solve the problem"
(this is my own translation of the original message in Spanis:
"Error al iniciar la aplicación porque no se encontró jpeg_osgeo.dll. La
reinstalación de la aplicación puede solucionar el problema")

(I was not present while the student made the actual installation, so
cannot guarantee that he followed the directions above strictly).

The problem is that we have tried to uninstall through osgeo4w-setup
but don't get to make a complete uninstall, there are always
remaining items. We've uninstalled as much as we could, and installed
again, but the problem remains.

Could you advice on how to proceed for a complete removal and subsequent
successful installation?

Thanks

Agus


-- 
Dr. Agustin Lobo
Institut de Ciencies de la Terra "Jaume Almera" (CSIC)
LLuis Sole Sabaris s/n
08028 Barcelona
Spain
Tel. 34 934095410
Fax. 34 934110012
email: agustin.l...@ija.csic.es
http://www.ija.csic.es/gt/obster


-- 
Dr. Agustin Lobo
Institut de Ciencies de la Terra "Jaume Almera" (CSIC)
LLuis Sole Sabaris s/n
08028 Barcelona
Spain
Tel. 34 934095410
Fax. 34 934110012
email: agustin.l...@ija.csic.es
http://www.ija.csic.es/gt/obster
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[Qgis-user] simple question

[T K]

HII accidentally closed the map legend and the overview windows.
how can i re-open them and make them visible?
thnx a bunch
T.
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Re: [Qgis-user] simple question

[Alessandro Sarretta]

Right click of the mouse on the main or tool bar and then select Legend 
and Overview :-)

Ale

T K ha scritto:

HI
I accidentally closed the map legend and the overview windows. 
how can i re-open them and make them visible?

thnx a bunch
T.




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Re: [Qgis-user] simple question

[Borys Jurgiel]

Tuesday 03 March 2009 14:11:16 T K napisał(a):
> HII accidentally closed the map legend and the overview windows.
> how can i re-open them and make them visible?
> thnx a bunch
> T.
> 

Depending on your QGIS version and OS, there is the "Panels" item somewhere in 
the menu.
 
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Re: [Qgis-user] simple question

[Borys Jurgiel]

Tuesday 03 March 2009 14:18:31 Alessandro Sarretta napisał(a):
> Right click of the mouse on the main or tool bar and then select Legend 
> and Overview :-)

Oh, this way is even simpler ;-)
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Re: [Qgis-user] simple question

[Nikos Alexandris]

On Tue, 2009-03-03 at 15:11 +0200, T K wrote:
> HI
> I accidentally closed the map legend and the overview windows. 
> how can i re-open them and make them visible?
> thnx a bunch
> T.

Hi!

As I am detaching those windows from the main window this happens to me
frequently :-). You can activate them again via Settings > Panels >
check Legend | check Overview.

Cheers, Nikos


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Re: [Qgis-user] QGis proxy settings

[Gavin Fleming]

I've just installed QGIS 1.0.1 from OSGeo4W with Plugin installer 0.9.8 and
this issue is still present. 

All remote repositories are unavailable and I can't see WMS and WFS
services, even though my proxy settings are correct in Options.

any tips?


Craig Leat wrote:
> 
> Borys Jurgiel wrote:
>> I've just uploaded Installer 0.06.6. Now it uses QGIS proxy settings from
>> the
>> options window (including login & password). Could you test it?
> 
> It works with my http proxy, which requires authentication, and trunk
> r9552.
> 
> Craig
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AW: [Qgis-user] QGis proxy settings

[Hugentobler Marco]

Hi Gavin

The extended Proxy options (possibility to choose the proxy type) are only in 
1.1, not in the 1.0.x versions.

Regards,
Marco


-Ursprüngliche Nachricht-
Von: qgis-user-boun...@lists.osgeo.org im Auftrag von Gavin Fleming
Gesendet: Di 03.03.2009 14:23
An: qgis-user@lists.osgeo.org
Betreff: Re: [Qgis-user] QGis proxy settings
 

I've just installed QGIS 1.0.1 from OSGeo4W with Plugin installer 0.9.8 and
this issue is still present. 

All remote repositories are unavailable and I can't see WMS and WFS
services, even though my proxy settings are correct in Options.

any tips?


Craig Leat wrote:
> 
> Borys Jurgiel wrote:
>> I've just uploaded Installer 0.06.6. Now it uses QGIS proxy settings from
>> the
>> options window (including login & password). Could you test it?
> 
> It works with my http proxy, which requires authentication, and trunk
> r9552.
> 
> Craig
> ___
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> http://lists.osgeo.org/mailman/listinfo/qgis-user
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> 

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RE: [Qgis-user] [Fwd: Problem at starting QGIS and atuninstallingthrough osgeo4w-setup]

[Gavin Fleming]

 

A slightly modified solution to installing QGIS from OSGeo4W (solved my problem 
below):

 

1) Download the whole OSGeo4W tree as shown on 
http://trac.osgeo.org/osgeo4w/wiki/InstallFromCD using rsyc, wget or other 
appropriate tool. This needs to be done only once for your organisation. (Make 
this available to other users via CD or file server, in which case get them to 
copy it locally.)

3) Run osgeo4w-setup.exe

4) Choose options as per 
http://sites.google.com/site/eospansite/qsig-for-windows  

Except: After choosing Advanced install, choose Install from Internet, leave 
root directory as default, then select your downloaded folder as Local Package 
Directory (e.g. E:\software\osgeo4w), then choose your internet connection 
method. Then proceed to choose your packages as before. 

 

The difference with this method is that the install will use local files if 
they are present, only downloading files it can't find, or more recent 
versions. And it seems to complete the installation properly. 

 

The problems in my mail below came from choosing "Install from local directory" 


 

Gavin 

 

 

-Original Message-
From: qgis-user-boun...@lists.osgeo.org 
[mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Gavin Fleming
Sent: 03 March 2009 12:49 PM
To: agustin.l...@ija.csic.es; qgis-user; qgis-developer
Subject: RE: [Qgis-user] [Fwd: Problem at starting QGIS and 
atuninstallingthrough osgeo4w-setup]

 

Seems to be related to Agus' problem: 

 

I downloaded the 'CD equivalent' from 
http://trac.osgeo.org/osgeo4w/wiki/InstallFromCD and have run the install 
locally, choosing QGIS and related plugins.

 

Several dependencies weren't automatically selected (GEOS, proj4, etc) so I 
went back and manually selected and installed them. However, it's now not able 
to find "proj_fw.dll" which is not evident anywhere in the install package. 
(The proj4 pakage is installed). So my install process has come to a halt. 

 

Also, from the package names it appears that it's still only QGIS 1 preview 2 
that's in OSGeo4W. Or is it the full QGIS 1.0?

 

thanks

 

Gavin Fleming 

 

 

 Original Message 

Subject: Problem at starting QGIS and at uninstalling through osgeo4w-setup

Date: Sun, 01 Mar 2009 11:58:13 +0100

From: Agustin Lobo 

Reply-To: agustin.l...@ija.csic.es

To: osgeo4w-...@lists.osgeo.org

 

Hi!

 

After around 30 installations of QGIS using osgeo4w

according to directions in:

http://sites.google.com/site/eospansite/qsig-for-windows

(please notify of any improvements that should be done)

 

I've found only 1 case with a major problem (Win XP machine)

and I would most appreciate your help.

 

At starting QGIS, the following message is displayed and the program

does not start:

"Error at starting the program because jpeg_osgeo.dll could not be

found. Reinstaling the program could solve the problem"

(this is my own translation of the original message in Spanis:

"Error al iniciar la aplicación porque no se encontró jpeg_osgeo.dll. La

reinstalación de la aplicación puede solucionar el problema")

 

(I was not present while the student made the actual installation, so

cannot guarantee that he followed the directions above strictly).

 

The problem is that we have tried to uninstall through osgeo4w-setup

but don't get to make a complete uninstall, there are always

remaining items. We've uninstalled as much as we could, and installed

again, but the problem remains.

 

Could you advice on how to proceed for a complete removal and subsequent

successful installation?

 

Thanks

 

Agus

 

 


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[Qgis-user] outline style - fill style

[ivan marchesini]

Hi...
wich is the best way to create some kind of different style for outline
and fill into qgis?

I need to create some lines that have, for example, circles along the
line length, or some kinds of fill style like tringles or other
symbols...

thanks for your answer...

Ivan


-- 
Ti prego di cercare di non inviarmi files .dwg, .doc, .xls, .ppt.
Preferisco formati liberi.
Please try to avoid to send me .dwg, .doc, .xls, .ppt files.
I prefer free formats.
http://it.wikipedia.org/wiki/Formato_aperto
http://en.wikipedia.org/wiki/Open_format

Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a 
06125
Perugia (Italy)
Socio fondatore GFOSS "Geospatial Free and Open Source Software" 
http://www.gfoss.it
e-mail: marches...@unipg.it
ivan.marches...@gmail.com
tel: +39(0)755853760
fax (university): +39(0)755853756
fax (home): +39(0)5782830887
jabber: geoiva...@jabber.org
-- 
Ti prego di cercare di non inviarmi files .dwg, .doc, .xls, .ppt.
Preferisco formati liberi.
Please try to avoid to send me .dwg, .doc, .xls, .ppt files.
I prefer free formats.
http://it.wikipedia.org/wiki/Formato_aperto
http://en.wikipedia.org/wiki/Open_format

Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a 
06125
Perugia (Italy)
Socio fondatore GFOSS "Geospatial Free and Open Source Software" 
http://www.gfoss.it
e-mail: marches...@unipg.it
ivan.marches...@gmail.com
tel: +39(0)755853760
fax (university): +39(0)755853756
fax (home): +39(0)5782830887
jabber: geoiva...@jabber.org

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RE: [Qgis-user] outline style - fill style

[Woolard, Zachary S.]

I've had success by creating a svg file of the symbol I want and placing
it in the SVG directory of my Quantum install.  

Zachary 

 


-Original Message-
From: qgis-user-boun...@lists.osgeo.org
[mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of ivan marchesini
Sent: Tuesday, March 03, 2009 6:54 AM
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] outline style - fill style

Hi...
wich is the best way to create some kind of different style for outline
and fill into qgis?

I need to create some lines that have, for example, circles along the
line length, or some kinds of fill style like tringles or other
symbols...

thanks for your answer...

Ivan


-- 
Ti prego di cercare di non inviarmi files .dwg, .doc, .xls, .ppt.
Preferisco formati liberi.
Please try to avoid to send me .dwg, .doc, .xls, .ppt files.
I prefer free formats.
http://it.wikipedia.org/wiki/Formato_aperto
http://en.wikipedia.org/wiki/Open_format

Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a 
06125
Perugia (Italy)
Socio fondatore GFOSS "Geospatial Free and Open Source Software"
http://www.gfoss.it
e-mail: marches...@unipg.it
ivan.marches...@gmail.com
tel: +39(0)755853760
fax (university): +39(0)755853756
fax (home): +39(0)5782830887
jabber: geoiva...@jabber.org
-- 
Ti prego di cercare di non inviarmi files .dwg, .doc, .xls, .ppt.
Preferisco formati liberi.
Please try to avoid to send me .dwg, .doc, .xls, .ppt files.
I prefer free formats.
http://it.wikipedia.org/wiki/Formato_aperto
http://en.wikipedia.org/wiki/Open_format

Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a 
06125
Perugia (Italy)
Socio fondatore GFOSS "Geospatial Free and Open Source Software"
http://www.gfoss.it
e-mail: marches...@unipg.it
ivan.marches...@gmail.com
tel: +39(0)755853760
fax (university): +39(0)755853756
fax (home): +39(0)5782830887
jabber: geoiva...@jabber.org

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Re: [Fwd: [Qgis-user] will the install be simplier in the future ?]

[matthieu le saec]

Agus, you're right, i need the plugin installer, for tools i found here
http://www.ftools.ca/cfarmerQgisRepo.xml and maybe for others.
Future users are enthusiast about using qgis and i need to extend the
possibilities.
So i ll install what is mentionned here
http://wiki.qgis.org/qgiswiki/OsGeo4wSetup
cheers

matthieu

2009/2/26 Agustin Lobo 

> You don't need to know any python to use the python plugins
> in QGIS: from an user point of view, they are just as the other
> tools you have. Python plugins are a very important feature
> of QGIS because it is an excellent way to facilitate the contribution
> of additional tools.
> You are missing a lot of QGIS if you are not using the python
> plugins, many people are contributing excellent tools.
>
> You don't have to reinstall. Just go to the advanced install
> and select what is listed in my directions but was not
> automatically selected in your former installation (the installer
> knows what is already installed, you just have to leave "keep" for those).
> Only the additional features will be installed.
> Then follow directions to get things properly set up
> in QGIS. Let me know of any problems.
>
> Agus
>
>
> matthieu le saec wrote:
>
>> I don't need them for the use i have. To be honest, I only know python is
>> a programming language :-)
>> cheers
>>
>> 2009/2/26 Agustin Lobo > agustin.l...@ija.csic.es>>
>>
>>True, but note that the Express innstall does not
>>install  some of the tools I mention, in particular
>>not  the python plugin installer.
>>
>>Agus
>>
>>matthieu le saec wrote:
>>
>>Hi thanx for answers.
>>In fact, i tried the express install as Teresa suggested, nad it
>>worked after i deleted all previous installation with the package.
>>So i can say it is simple to only install qgis.
>>
>>Agus i didn't know
>>http://sites.google.com/site/eospansite/qsig-for-windows
>>I didn't try the advanced install as showned.
>>But step 4 /You have to select Advanced Install (Qgis is not
>>listed under //Express Install)/.  is obsolete, and installing
>>qgis from express install worked well.
>>I ll make this info known on the french forum i use. foru
>>http://www.forumsig.org
>>
>>Thanx for answers
>>
>>
>>
>>2009/2/25 Agustin Lobo >
>>> >>>
>>
>>   To: matthieules...@gmail.com
>>
>>> >>,
>>   m.rosales@gmail.com 
>>>,
>>   qgis-user@lists.osgeo.org 
>>>>
>>
>>
>>
>>   In the meantime, my directions might be helpful, at least
>>   a bunch of students get thru with them:
>>   http://sites.google.com/site/eospansite/qsig-for-windows
>>   http://wiki.qgis.org/qgiswiki/OsGeo4wSetup
>>
>>   Let me know if there are steps that should be further clarified
>>
>>   Agus
>>
>>
>>   Message: 3
>>   Date: Tue, 24 Feb 2009 15:45:38 +0100
>>   From: matthieu le saec >
>>   >>>
>>
>>   Subject: [Qgis-user] will the install be simplier in the
>>future ?
>>   To: qgis-user@lists.osgeo.org
>>
>>>>
>>
>>   Message-ID:
>>  <
>> bd4e2c9b0902240645g4f91be84t9f061774a0f7f...@mail.gmail.com
>>> bd4e2c9b0902240645g4f91be84t9f061774a0f7f...@mail.gmail.com>
>> > bd4e2c9b0902240645g4f91be84t9f061774a0f7f...@mail.gmail.com
>>> bd4e2c9b0902240645g4f91be84t9f061774a0f7f...@mail.gmail.com>>>
>>
>>   Content-Type: text/plain; charset="iso-8859-1"
>>
>>   Hi,
>>
>>   I got some problems installing Qgis with the package
>>osgeo4w. I
>>   work on Win
>>   XP SP3.
>>   I choosed to work with 0.11 because it was simple to
>> install.
>>
>>   So my question is : will the install be simplier in the
>>future
>>   or the
>>   further version will stay on the same structure ?
>>   I mean for somebody who is not familiar with the opensource
>>   world (libraries
>>   etc) and wants simple features with a GIS like QGIS 0.11
>>   provides me.
>>
>>   Thanx.
>>
>>  

Re: [Qgis-user] delimited text

[Magnus Homann]

John C. Tull skrev:

Declan,

I've found that the plugin is very picky about line endings. You will 
need to use a text editor that can change your line endings from Mac to 
another format such as DOS or a unix format. Of course, it would be nice 
for the plugin to not care. I always forget this, and spend a few more 
minutes than I want recalling the reason and working it out.


I've been meaning to fix this, but it was much harder than I anticipated.

Magnus

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Re: [Qgis-user] #1211 Relative paths within QGIS project file

[Magnus Homann]

Agustin Lobo skrev:

Ticket #1211Relative paths within QGIS project file
is set as a 1.0.1 milestone but has nobody
as owner, does this imply that nobody is
going to take care of it?


Somebody has top figure out how to distinguish absoulte paths (such as database 
URL:s)
from relative paths (such as file located in or below where the project path 
is).

Magnus
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RE: [Qgis-user] outline style - fill style

[ivan marchesini]

Thanks Zachary,
but does it works also for line and fill patterns?
I believed only for points... but if you confirm this I will start to
try..

thanks 




Il giorno mar, 03/03/2009 alle 08.46 -0500, Woolard, Zachary S. ha
scritto:
> I've had success by creating a svg file of the symbol I want and placing
> it in the SVG directory of my Quantum install.  
> 
> Zachary 
> 
>  
> 
> 
> -Original Message-
> From: qgis-user-boun...@lists.osgeo.org
> [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of ivan marchesini
> Sent: Tuesday, March 03, 2009 6:54 AM
> To: qgis-user@lists.osgeo.org
> Subject: [Qgis-user] outline style - fill style
> 
> Hi...
> wich is the best way to create some kind of different style for outline
> and fill into qgis?
> 
> I need to create some lines that have, for example, circles along the
> line length, or some kinds of fill style like tringles or other
> symbols...
> 
> thanks for your answer...
> 
> Ivan
> 
> 
> -- 
> Ti prego di cercare di non inviarmi files .dwg, .doc, .xls, .ppt.
> Preferisco formati liberi.
> Please try to avoid to send me .dwg, .doc, .xls, .ppt files.
> I prefer free formats.
> http://it.wikipedia.org/wiki/Formato_aperto
> http://en.wikipedia.org/wiki/Open_format
> 
> Ivan Marchesini
> Department of Civil and Environmental Engineering
> University of Perugia
> Via G. Duranti 93/a 
> 06125
> Perugia (Italy)
> Socio fondatore GFOSS "Geospatial Free and Open Source Software"
> http://www.gfoss.it
> e-mail: marches...@unipg.it
> ivan.marches...@gmail.com
> tel: +39(0)755853760
> fax (university): +39(0)755853756
> fax (home): +39(0)5782830887
> jabber: geoiva...@jabber.org
-- 
Ti prego di cercare di non inviarmi files .dwg, .doc, .xls, .ppt.
Preferisco formati liberi.
Please try to avoid to send me .dwg, .doc, .xls, .ppt files.
I prefer free formats.
http://it.wikipedia.org/wiki/Formato_aperto
http://en.wikipedia.org/wiki/Open_format

Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a 
06125
Perugia (Italy)
Socio fondatore GFOSS "Geospatial Free and Open Source Software" 
http://www.gfoss.it
e-mail: marches...@unipg.it
ivan.marches...@gmail.com
tel: +39(0)755853760
fax (university): +39(0)755853756
fax (home): +39(0)5782830887
jabber: geoiva...@jabber.org

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[Qgis-user] landuse raster

[ambrish dhaka]

Hello all,
I wish to extract landuse from landsat images. Can somebody outline the steps 
and how can it be done. So far I have created a composite and then I am 
vectorising them manually. Is there a better way of extracting settlement areas 
and other agricultural landuse. A help would be highly appreciated.
Thanks!
Ambrish

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[Qgis-user] Setting a line's length attribute

[Matej]

Hello,

I have a PostGIS table which has an attribute "length". I would like to have 
calculated length of every particular segment (the information that is printed 
when I click on the Identify Features and then select some line segment) to be 
somehow "set" into the field length automatically. In MapInfo, this can be 
achieved by Update column and then setting the ObjectLen to the appropriate 
field.

How can this be done in QGIS?

Thanks a lot!

Matej
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Re: [Qgis-user] Setting a line's length attribute

[Andreas Neumann]

Hi Matej,

QGIS does not yet have a field calculator or a similar mechanism. But 
since your data is in Postgis already, it is very easy to do it with 
Postgis and SQL:


UPDATE yourschema.yourtable SET LineLength = ST_Length(the_geom);

You can even set a row-level trigger so that the length gets 
automatically updated if a geometry changed. Please let me know if you 
are interested in the trigger thing.


Andreas

Matej wrote:

Hello,
 
I have a PostGIS table which has an attribute "length". I would like 
to have calculated length of every particular segment (the information 
that is printed when I click on the Identify Features and then select 
some line segment) to be somehow "set" into the field length 
automatically. In MapInfo, this can be achieved by Update column and 
then setting the ObjectLen to the appropriate field.
 
How can this be done in QGIS?
 
Thanks a lot!
 
Matej

ma...@matnet.net 


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Re: [Qgis-user] Setting a line's length attribute

[Matej]

Hi Andreas,

the solution with a trigger sounds very interesting. 


Could you please present more about it?

Thanks,
Matej
ma...@matnet.net

- Original Message - 
From: "Andreas Neumann" 

To: "qgis-user" 
Sent: Tuesday, March 03, 2009 8:37 PM
Subject: Re: [Qgis-user] Setting a line's length attribute



Hi Matej,

QGIS does not yet have a field calculator or a similar mechanism. But 
since your data is in Postgis already, it is very easy to do it with 
Postgis and SQL:


UPDATE yourschema.yourtable SET LineLength = ST_Length(the_geom);

You can even set a row-level trigger so that the length gets 
automatically updated if a geometry changed. Please let me know if you 
are interested in the trigger thing.


Andreas

Matej wrote:

Hello,
 
I have a PostGIS table which has an attribute "length". I would like 
to have calculated length of every particular segment (the information 
that is printed when I click on the Identify Features and then select 
some line segment) to be somehow "set" into the field length 
automatically. In MapInfo, this can be achieved by Update column and 
then setting the ObjectLen to the appropriate field.
 
How can this be done in QGIS?
 
Thanks a lot!
 
Matej

ma...@matnet.net 


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