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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