I got the geometries from convex hull computation. This directs me to
ConvexHullTest.
As I stated earlier:
For ConvexHullTest:
List<DirectPosition> pos;
pos = this.surfaceToPositions((Surface) res);
However I don't find counterpart for DirectPosition in com.vividsolutions
namespace.
Regards
On Mon, Jul 11, 2011 at 1:50 AM, Michael Bedward
<[email protected]>wrote:
> Hello all,
>
> Just to add a little more to Andy's points in case it is useful...
>
> > 1. For JTS contains it clearly states (in the link Jody provided), that
> the test is that the
> > geometry is within the boundary of the other geometry and that it regards
> any point on
> > the boundary to mean the geomerty is not contained.
>
> You can use the Geometry.covers or Geometry.coveredBy methods to allow
> for points on the boundary...
>
> http://tsusiatsoftware.net/jts/javadoc/com/vividsolutions/jts/geom/Geometry.html#covers(com.vividsolutions.jts.geom.Geometry)
>
> > 2. If precision is very important and you are for instance dealing with
> small differences
> > in coordinates represented by large numbers, you may have issues due to
> inaccuracy.
> > I think the JTS implementation relies on a precision model that cannot
> guarantee an
> > accurate result in all cases.
>
> If the coordinates are all large numbers, but are not spread over a
> large range, you can get better effective precision by centering them
> on the origin (subtracting the common mean from all coordaintes).
>
> Alternatively, if you are creating the Geometry objects you can pass a
> specific PrecisionModel to GeometryFactory...
>
> http://tsusiatsoftware.net/jts/javadoc/com/vividsolutions/jts/geom/PrecisionModel.html
>
> Finally, in JTS 1.12 there is a new GeometryPrecisionReducer class
> which might be relevant to your case...
>
> http://tsusiatsoftware.net/jts/javadoc/com/vividsolutions/jts/precision/GeometryPrecisionReducer.html
>
> Hope this helps,
> Michael
>
------------------------------------------------------------------------------
All of the data generated in your IT infrastructure is seriously valuable.
Why? It contains a definitive record of application performance, security
threats, fraudulent activity, and more. Splunk takes this data and makes
sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-d2d-c2
_______________________________________________
Geotools-gt2-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
