David here is the thing we use slightly different words so I am not exactly
sure what you mean.
So *yes* it can be done easily (now what is it?).
Well a multi-polygon offers a collection of the individual polygons, so use a
for loop to convert them if you like?
for( int i=0; i< multipolygon.getNumGeometries(); i++ ){
Polygon polygon = (Polygon) multipolygon.getGeometryN( i );
}
For more info:
http://tsusiatsoftware.net/jts/javadoc/com/vividsolutions/jts/geom/MultiPolygon.html
--
Jody Garnett
On Monday, 3 December 2012 at 10:16 PM, David Shi wrote:
> Dear Jody,
>
> I just wonder whether a single multi-polygon can be converted to individual
> polygons.
>
> Can this be done easily?
>
> It is very easy in ESRI ArcGIS.
>
> Regards.
>
> David
>
>
> From: Jody Garnett <[email protected] (mailto:[email protected])>
> To: David Shi <[email protected] (mailto:[email protected])>
> Cc: geotools users <[email protected]
> (mailto:[email protected])>
> Sent: Monday, 3 December 2012, 11:27
> Subject: Re: [Geotools-devel] Feature to polygon
>
> Hey David, we should keep communication on the geotools user list (if you
> would like to email questions to me privately, my employer LISAsoft can
> arrange a support contract). Plus this way you get a wide range of feedback,
> incase I am no the wrong track myself.
> > What happens when many polygons are digitised as one polygon.
>
> That is called a MultiPolygon. You may want to look at the standards side of
> the street (rather than ESRI) in order to get a hold
> of the functionality (and language) we use.
>
> The geometry support follows the "Simple Features for SQL" standard, if you
> download that document from the OGC you will be able to answer many of your
> questions.
>
> Our feature comes from the OGC "General Feature Model", the specific project
> > ESRI's feature to polygon function can convert features into polygons.
>
> If you would like to combine individual polygons (or multi-polygons) into a
> single multi-polygon you can use lookup how to do "union".
> - http://docs.geotools.org/latest/userguide/library/jts/combine.html
> >
> > Can Geotools do the same?
> If it cannot, you as a developer can do the rest :-)
>
> Cheers,
> Jody
>
>
>
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