Sunburned Surveyor a écrit : > I'd like to share some thoughts on the referencing module. I'm > wondering if this new situation that has developed would be an > opportunity to introduce a common interface that could be used for > coordinate transformations.
Those interfaces already exist in GeoAPI. This is the MathTransform interface: http://geoapi.sourceforge.net/snapshot/javadoc/org/opengis/referencing/operation/MathTransform.html This interface is derived from OGC 01-009 specification (OpenGIS Coordinate Transformation Service Implementation Specification): http://www.opengeospatial.org/standards/ct > public abstract void setSourceCrs(String argSourceCrs); > > public abstract void setDestinationCrs(String argDestinationCrs); > > public abstract double[] transformCoordinate(double[] coordinate); Using GeoAPI interfaces (all derived from OGC specifications, let me remind), you would process as below: CoordinateReferenceSystem sourceCRS = crsFactory.createFromWKT("..."); CoordinateReferenceSystem targetCRS = crsFactory.createFromWKT("..."); MathTransform mt = coordinateOperationFactory.createOperation(sourceCRS, targetCRS).getMathTransform(): mt.transform(coordinates, 0, coordinates, 0, numPoints); If it is too verbose, a trivial helper class could be created with the above API. But it would be just a convenience class delegating the work to the 4 above lines. Martin ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Geotools-devel mailing list Geotools-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-devel
