[Geotools-gt2-users] CRS problems with SwtMapPane

[Thomas W. <fo...@th...>]

Hello,

I'm quite new to geotools and I'm trying to get to grips with it.
Trying to load some shapefiles (see attachment) into a MapContent which in turn 
is associated with a SwtMapPane I always get an exception that suggests that 
there's something wrong with the current CRS of the map pane:

java.lang.IllegalArgumentException: Argument "sourceCRS" should not be null.
	at 
org.geotools.referencing.operation.AbstractCoordinateOperationFactory.ensureNonNull(AbstractCoordinateOperationFactory.java:734)
	at 
org.geotools.referencing.operation.BufferedCoordinateOperationFactory.createOperation(BufferedCoordinateOperationFactory.java:249)
	at org.geotools.referencing.CRS.findMathTransform(CRS.java:1205)
	at org.geotools.referencing.CRS.findMathTransform(CRS.java:1173)
	at org.geotools.swt.SwtMapPane.setCrs(SwtMapPane.java:436)
	at org.geotools.swt.SwtMapPane.layerAdded(SwtMapPane.java:812)
	at org.geotools.map.MapContent.fireLayerAdded(MapContent.java:468)
	at 
org.geotools.map.MapContent$LayerList.addIfAbsent(MapContent.java:1063)
	at org.geotools.map.MapContent.addLayer(MapContent.java:369)
	at org.geotools.JSurveyMvn.App.fileOpen(App.java:87)
	at org.geotools.JSurveyMvn.App$1.widgetSelected(App.java:113)
	at 
org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:234)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3540)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3161)
	at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
	at org.eclipse.jface.window.Window.open(Window.java:801)
	at org.geotools.JSurveyMvn.App.<init>(App.java:47)
	at org.geotools.JSurveyMvn.App.main(App.java:58)

When trying to explicitly set a CRS directly after associating the (empty) 
MapContext to the map pane (see line 149), I'll get a NullPointerException 
like that:

java.lang.NullPointerException
	at org.geotools.swt.SwtMapPane.setCrs(SwtMapPane.java:433)
	at org.geotools.JSurveyMvn.App.createContents(App.java:152)
	at org.eclipse.jface.window.Window.create(Window.java:431)
	at org.eclipse.jface.window.Window.open(Window.java:790)
	at org.geotools.JSurveyMvn.App.<init>(App.java:47)
	at org.geotools.JSurveyMvn.App.main(App.java:58)


I'm quite desparate of being unable to solve that problem. Can you please give 
me a hand to make it work?

Attached is the source code of an example application that demonstrates the 
problem (run under linux (amd64) using getools v. 14.0) as well as the 
shapefile.

Thanks in advance and best regards!
 Thomas