Hey guys,
I'm getting points from NASA's WorldWind as LatLon coordinates and trying to
convert them into coordinates in the projection the various shapefiles I'm
using have. Here's the code I wrote for that:
public double[] latLonToProjection( LatLon latlon ) throws Exception {
MathTransform t = CRS.findMathTransform(CRS.decode("EPSG:4326"),
originalCRS);
double[] a = {latlon.getLongitude().getDegrees(),
latlon.getLatitude().getDegrees() };
double[] b = { 0, 0 };
t.transform(a, 0, b, 0, 1);
return b;
}
Whenever I try this though, I get this exception:
org.opengis.referencing.operation.OperationNotFoundException: Bursa wolf
parameters required.
at
org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperationStep
(DefaultCoordinateOperationFactory.java:1078)
at
org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperationStep
(DefaultCoordinateOperationFactory.java:1145)
at
org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperationStep
(DefaultCoordinateOperationFactory.java:883)
at
org.geotools.referencing.operation.DefaultCoordinateOperationFactory.createOperation
(DefaultCoordinateOperationFactory.java:207)
at
org.geotools.referencing.operation.BufferedCoordinateOperationFactory.createOperation
(BufferedCoordinateOperationFactory.java:255)
at org.geotools.referencing.CRS.findMathTransform(CRS.java:912)
at org.geotools.referencing.CRS.findMathTransform(CRS.java:881)
at gtww.ShapeLayer.latLonToProjection(ShapeLayer.java:169)
at gtww.ShapeLayer.featureAt(ShapeLayer.java:192)
at gtww.ShapeLayer.selected(ShapeLayer.java:286)
at gov.nasa.worldwind.awt.AWTInputHandler.callSelectListeners(Unknown
Source)
at gov.nasa.worldwind.awt.AWTInputHandler.mousePressed(Unknown
Source)
at java.awt.AWTEventMulticaster.mousePressed(
AWTEventMulticaster.java:262)
at java.awt.Component.processMouseEvent(Component.java:6035)
at java.awt.Component.processEvent(Component.java:5803)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(
EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(
EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(
EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java
:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java
:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Any ideas what I'm doing wrong? I'm not very well versed in projections so
I'm not sure what Bursa wolf parameters are. Is there perhaps a better way
to do this? Mostly I just need this for selection purposes (clicking on the
layer in worldwind and figuring out which feature was clicked, for
instance).
Thanks,
Ian
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