[Geotools-gt2-users] Clipping features

[Miles <mil...@sy...>]

Hi,

I am working at an application that requires to clip features read from 
a shape file. When I looked at the Clipper, it requires an instance of 
CoordinateSystem. Can this coordinatesystem object be null? Attached are 
my codes. The commented part are what I want to do with the read feature 
from the file.

Thanks a bunch,

Miles



                Vector result = new Vector();
                URL shapeURL = f.toURL();
                ShapefileDataStore store = new ShapefileDataStore(shapeURL);
                String name = store.getTypeNames()[0];
                FeatureSource source = store.getFeatureSource(name);

                System.out.println("coordinate system: " + 
source.getSchema().getDefaultGeometry().getCoordinateSystem());   // 
this always seem to return null
//                rectangle2D = new Rectangle(envelop.get);
//                clipper = new Clipper(rectangle2D, null);
               
                FeatureResults fsShape = source.getFeatures();
                FeatureReader reader = fsShape.reader();
                Feature feature ;
                while (reader.hasNext()) {
                    feature = reader.next();             
 // apply clip to the feature's geometry. create an application specifc 
object using the feature atrributes and the clipped geometry.
                    Object o = createObject(feature);     
                    result.add(o);
                }
                reader.close();
                return result;