Miles a écrit :
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.
Do you means org.geotools.renderer.geom.Clipper? It was designed
specifically for rendering purpose, but I guess it can be of some help
outside rendering too... Note that you can perform clipping in a more
general way (but greater computation cost) using java.awt.geom.Area.
Maybe JTS has some tools for that too.
Back on Clipper. I think that the CoordinateSystem is mandatory, but if
you don't know it, maybe you can provides a default cartesian one. This
class expect a CoordinateSystem from the legacy CTS framework (Clipper
has not yet been ported to the new CRS framework). You may one of the
org.geotools.cs.LocalCoordinateSystem pre-defined constants.
Martin.
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