Hey,
The current Geotools uses JTS points directly. For now, ignore the
OpenGIS points and interfaces for almost *everything*. The only place
that OpenGIS geometries are used is deep within the referencing module.
The OpenGIS geometries are a work in progress with a long way to go.
your point below also needs a CoordinateReferencingSystem. See
demo/introduction...
--adrian
On Mon, 2007-03-12 at 16:14 +0100, Jeroen van Dijk wrote:
> Thanks for your help Teodor. I have looked into the JTS documentation
> and I know now how to create a point:
>
> import com.vividsolutions.jts.geom.Coordinate;
> import com.vividsolutions.jts.geom.CoordinateSequence;
> import com.vividsolutions.jts.geom.GeometryFactory;
> import com.vividsolutions.jts.geom.Point;
> import com.vividsolutions.jts.geom.impl.CoordinateArraySequence;
>
> Coordinate [] coordArr = {new Coordinate(51.594f, 4.777f) };
> CoordinateSequence cs = new CoordinateArraySequence( coordArr );
>
> GeometryFactory factory;
> Point point = new Point(cs, new GeometryFactory() );
>
>
> However, this point is not compatible with the GeoTools Point interface
> because this is based on the OpenGis interface and JTS Point class
> doesn't implement this. So how can I used this Point object with the
> Geotools library to make selection in a shapefile?
>
> Sorry for these questions but it is just not clear to me.
>
> Regards,
> Jeroen
>
>
> -----Original Message-----
> From: Teodor BACIU [mailto:[EMAIL PROTECTED]
> Sent: Monday, March 12, 2007 2:34 PM
> To: Jeroen van Dijk; [email protected]
> Subject: Re: [Geotools-gt2-users] GeometryFactory for a circle?
>
> On Mon, 12 Mar 2007 15:18:54 +0200, Jeroen van Dijk <[EMAIL PROTECTED]>
>
> wrote:
>
> > Maybe, a silly question, but I still haven't solved my previous posted
> > problem. My problems start quite basic: How do I create a point
> > Geometry?
> >
> > I guess I'm missing some basic knowledge of the API, but the tutorials
> > do not help me here either.
> >
>
> Hi,
>
> Geotools is using for geometry operations the JTS
> API, developped by Vivid Solutions. You will have
> to familiarize yourself with this API first.
>
> As a start point you can check the following section
> from the GeoTools tutorials:
>
> http://geotools.codehaus.org/Working+with+JTS+Geometries+from+DataStores
>
> Best regards,
> Teodor
>
> >
> > -----Original Message-----
> > From: Ian Turton [mailto:[EMAIL PROTECTED]
> > Sent: Friday, March 09, 2007 10:10 PM
> > To: Jeroen van Dijk
> > Cc: [email protected]
> > Subject: Re: [Geotools-gt2-users] GeometryFactory for a circle?
> >
> > On 3/9/07, Jeroen van Dijk <[EMAIL PROTECTED]> wrote:
> >>
> >
> >>
> >> I want select roads, from a shapefile, with a certain radius from a
> > point,
> >> thus lying in a circle.
> >>
> >>
> >>
> >> I found this link that shows how to select point with a polygon.
> >>
> >> http://www.nabble.com/filter-points-within-polygon-t2740648.html
> >>
> >>
> >>
> >> My only problem is now to create a Geometry that represents a circle.
> > Like
> >> in the post of
> >
> > What you really want is a DWithin filter which gives you everything
> > within a distance of a geometry (in your case a point).
> >
> > Ian
>
>
>
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