[Gvsig_english] nearest distance between points in polygons

[Francisco José Peñarrubia]

Hi Wolfgang.

The problem is due to 4058 columns. There is a bug in gvSIG with dbf 
fields (constant widht, and so, dbf's are larger than needed.
Anyway, when working with distance matrices, is a common mistake (in my 
opinion) to use a format of MxN matrix. There aren't many programs able 
to work with so many fields.
That's the reason to use another format in gvSIG network analysis to 
write distance matrices:
fromId             toId            cost            distance

Maybe you can modify the geoprocess of Sextante to write the data in 
this format.

Cheers.

Fran.

El 30/05/2011 18:03, Wolfgang Qual escribió:
> Hi,
> I just made a quick test. Shapefile with 4058 entries worked (a table was generated), but gvSIG was getting veeeeeeeeeeeery slow, nearly non-responding. I looked at the command line and noticed that the dbf created by sextante is huge: 283MB! Maybe this is too much... (the table has 4058 rows _and_ 4058 coloumns. Even if -Xmx is set to a higher value...
>
>
> Best,
> Wolfgang
>
>
> -------- Original-Nachricht --------
>> Datum: Mon, 30 May 2011 08:03:42 -0700 (PDT)
>> Von: Zi<jaugustin at zi-berlin.de>
>> An: gvsig_internacional at listserv.gva.es
>> Betreff: Re: [Gvsig_english] nearest distance between points in polygons
>> Thanks a lot, but gvSIG can't create the distance matrix (Message: out of
>> memory error - java heap space). Are the 3645 points too much to caculate
>> the matrix?
>>
>> --
>> View this message in context:
>> http://osgeo-org.1803224.n2.nabble.com/nearest-distance-between-points-in-polygons-tp6418724p6419470.html
>> Sent from the gvSIG users mailing list archive at Nabble.com.
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-- 
Fran Peñarrubia
Scolab
www.scolab.es

Asociación gvSIG
www.gvsig.com