[Gvsig_english] gvSIG 1.11 RC1 Select by buffer zone problem

[Frank Sokolic]

Hi Ruth,

I get this problem on Windows XP, Windows Vista and Ubuntu Linux. I have 
done some further investigation and the problem seems to be related to 
the regional settings on my computers. We use a point as a decimal 
symbol not a comma. The comma is used as a grouping symbol.

I have run the 'select by buffer' tool with 6 different buffer sizes to 
show you the problem. In the list below the first number is the buffer 
width I entered (in metres), the second value is the buffer width that 
gvSIG calculates (this is the value from the log file):
1.00  100.0
10.00  1000.0
100.00  10000.0
1,000.00  1.0
10,000.00  10.0
100,000.00   100.0

You can see a pattern here. gvSIG is misinterpreting the decimal point 
as a grouping symbol.

Frank.

On 2011/04/01 12:59, Ruth Schönbuchner wrote:
> Dear Frank,
>
> well I just tested it again with your shapefile and the projection 
> (epsg 32375) and couldn´t reproduce the problem.
> (see attached)
> I think it could be helpful to send the logfile after having produced 
> the problem on your system.
> Here some steps to reduce the gvsig.log to the essential part:
> - Delete the folder under "C:\Dokumente und Einstellungen\root\gvSIG"
> - Start gvSIG and perform the buffer selection again
> - post the gvsig.ini to this list
> Maybe one of the developers see some problem in detail?
> Do you have the possibility to test the selection on Windows XP?
> Best regards,
> Ruth
>
>
> > Date: Thu, 31 Mar 2011 16:43:58 +0200
> > From: sokolic at worldonline.co.za
> > To: r.schoenbuchner at hotmail.de
> > Subject: Re: [Gvsig_english] gvSIG 1.11 RC1 Select by buffer zone 
> problem
> >
> > Dear Ruth,
> >
> > Thanks for testing this but I still get the problem. Is you look at the
> > attached screenshot_1 you can see that I am setting the buffer at 100
> > metres. If you look at screenshot_2 you can see that gvSIG has changed
> > the value to 10000 metres.
> >
> > I have also attached the shapefiles so that you can test them. These 
> are
> > using the UTM Zone 35S coordinate reference system (EPSG 32375). 
> Perhaps
> > the problem is because I am using data from the Southern Hemisphere?
> >
> > Regards,
> > Frank.
> >
> > On 31/03/2011 11:20, Ruth Schönbuchner wrote:
> > > Dear Frank,
> > >
> > > i just tested your problem and could not reproduce it (on Win XP,
> > > Gauß-Krüger 4).
> > > To have a fixe size for testing, I created 100m buffer rings (with
> > > geoprocessing) around some buildings first.
> > > Afterwards I performed the tool 'select by buffer zone' for one of the
> > > buildings and the selection is correct.
> > > See attached screenshot.
> > > Best regards, Ruth
> > >
> > > > Date: Tue, 29 Mar 2011 20:01:20 +0200
> > > > From: sokolic at worldonline.co.za
> > > > To: gvsig_internacional at listserv.gva.es
> > > > Subject: [Gvsig_english] gvSIG 1.11 RC1 Select by buffer zone 
> problem
> > > >
> > > > Hi all,
> > > >
> > > > When using the 'Select by buffer zone' tool (Seleccion por area de
> > > > influencia) in gvSIG 1.11 RC1 the calculated buffer is always 
> 100 times
> > > > too big. For example, if I specify a buffer of 100 metres, the tool
> > > > produces a buffer of 10000 metres. If I request a buffer of 1 km the
> > > > tool produces one of 100 km. This happens on both Ubuntu Linux and
> > > > Windows Vista. These tests were done using both UTM and TM 
> projections.
> > > >
> > > > Frank.
> > > > _______________________________________________
> > > > Gvsig_internacional mailing list
> > > > Gvsig_internacional at listserv.gva.es
> > > > http://listserv.gva.es/cgi-bin/mailman/listinfo/gvsig_internacional
> >
>
>
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-- 
Frank Sokolic
GIS Solutions
Email: sokolic at worldonline.co.za
Web: gis-solutions.co.za
Tel: (031) 2615922
Fax: (031) 2615927
Cell: (082) 5115795

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