[Qgis-user] question on Ftools - polygon centroids

2009-03-26 Thread Fafner

Hi,
I have a question on the ftool-plugin, and more specifically the geometry tool 
polygon centroids. I find this tool very useful. However, when I use it, 
quite regularly a few points get the X or Y (or both) coordinates transformed 
to negative numbers, instead of x = 1234567 I get x = -1234567. 

Is this a known bug? Is there any way to prevent this? Can I edit the 
coordinates manually to fix this?

I use Qgis 1.0.1_Kore in Ubuntu 8.04lts, I have also experienced the error in 
Qgis for Windows. The coordinate system in use is Sweref99 TM.


thanx / Fafner
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Re: [Qgis-user] question on Ftools - polygon centroids

2009-03-26 Thread Carson Farmer

Hi Fafner,
I have a question on the ftool-plugin, and more specifically the geometry tool polygon centroids. I find this tool very useful. However, when I use it, quite regularly a few points get the X or Y (or both) coordinates transformed to negative numbers, instead of x = 1234567 I get x = -1234567. 


Is this a known bug? Is there any way to prevent this? Can I edit the 
coordinates manually to fix this?
  
This is a known bug, and it will be fixed in a future version of fTools, 
however, no simple fix (that I know of) exists yet. It likely only 
happens with certain projections... I'll try to come up with a temporary 
fix in the mean time...


Sorry for the inconvenience,

Carson

--
Carson J. Q. Farmer
ISSP Doctoral Fellow
National Centre for Geocomputation (NCG),
John Hume Building,
National University of Ireland, Maynooth,
Co. Kildare,
Ireland.
Phone: +353 (0) 1 708 6726
Fax:   +353 (0) 1 708 6456
Email: carson.far...@gmail.com
Web:   http://www.carsonfarmer.com/
  http://www.ftools.ca/

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Re: [Qgis-user] question on Ftools - polygon centroids

2009-03-26 Thread Carson Farmer

Fafner,

Hi Carson
thank you for the prompt reply, thanx also for your awesome work on the ftools.
  
Your first email motivated me to come up with an interim solution (which 
might actually become the permanent fix) this evening.
I will upload this fix to my repository tonight, and you should be able 
to run the centroids tool on pretty much any projection...


Please test (should be version 0.5.8) and let me know if this problem is 
fixed.


Cheers,

Carson

--
Carson J. Q. Farmer
ISSP Doctoral Fellow
National Centre for Geocomputation (NCG),
National University of Ireland, Maynooth,
Email: carson.far...@gmail.com
Web:   http://www.carsonfarmer.com/
  http://www.ftools.ca/

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Re: [Qgis-user] question on Ftools - polygon centroids

2009-03-26 Thread Giovanni Manghi

 Please test (should be version 0.5.8) and let me know if this problem is 
 fixed.
 


Hi Carson,
I just upgraded to 0.5.8 and in manage plugins it now says that ftools
is incompatible and so cannot be activated.


regards

-- Giovanni --

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Re: [Qgis-user] question on Ftools - polygon centroids

2009-03-26 Thread Carson Farmer
Oops, my bad, I think I deleted the minimum qgis version.. ok I'll 
upload in a minute... the version number won't change, but if you wait 
about 15 minutes you can try to download again...


C
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