Dear list,
I’m having troubles adding a GridCoverage2D layer to a SwtMapPane. The goal
is to avoid the creation of a GeoTiff to display the GridCoverage2D, which
drastically reduces the application performance.
Geotools offers the possibility of adding a GridCoverage or a
GridCoverage2D as a layer directly to the SwtMapPane, nevertheless, I
always get the following error:
GRAVE: org.geotools.feature.simple.SimpleFeatureImpl cannot be cast to
org.geotools.coverage.grid.GridCoverage2D
*java.lang.ClassCastException*:
org.geotools.feature.simple.SimpleFeatureImpl cannot be cast to
org.geotools.coverage.grid.GridCoverage2D
at org.geotools.renderer.lite.StreamingRenderer.processSymbolizers(
*StreamingRenderer.java:2446*)
at org.geotools.renderer.lite.StreamingRenderer.process(
*StreamingRenderer.java:2385*)
at org.geotools.renderer.lite.StreamingRenderer.drawPlain(
*StreamingRenderer.java:2241*)
at org.geotools.renderer.lite.StreamingRenderer.processStylers(
*StreamingRenderer.java:1940*)
at org.geotools.renderer.lite.StreamingRenderer.paint(
*StreamingRenderer.java:773*)
at org.geotools.swt.SwtMapPane.handleEvent(*SwtMapPane.java:1120*)
at org.eclipse.swt.widgets.EventTable.sendEvent(*EventTable.java:84*)
at org.eclipse.swt.widgets.Display.sendEvent(*Display.java:4353*)
at org.eclipse.swt.widgets.Widget.sendEvent(*Widget.java:1061*)
at org.eclipse.swt.widgets.Widget.sendEvent(*Widget.java:1085*)
at org.eclipse.swt.widgets.Widget.sendEvent(*Widget.java:1070*)
at org.eclipse.swt.widgets.Composite.WM_PAINT(*Composite.java:1491*)
at org.eclipse.swt.widgets.Control.windowProc(*Control.java:4667*)
at org.eclipse.swt.widgets.Canvas.windowProc(*Canvas.java:339*)
at org.eclipse.swt.widgets.Display.windowProc(*Display.java:5023*)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(*Native Method*
)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(*OS.java:2549*)
at org.eclipse.swt.widgets.Display.readAndDispatch(
*Display.java:3759*)
at
org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(
*PartRenderingEngine.java:1151*)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(
*Realm.java:331*)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(
*PartRenderingEngine.java:1032*)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(
*E4Workbench.java:148*)
at org.eclipse.e4.ui.internal.workbench.swt.E4Application.start(
*E4Application.java:164*)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(
*EclipseAppHandle.java:196*)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(
*EclipseAppLauncher.java:134*)
at
org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(
*EclipseAppLauncher.java:104*)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(
*EclipseStarter.java:380*)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(
*EclipseStarter.java:235*)
at sun.reflect.NativeMethodAccessorImpl.invoke0(*Native Method*)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(*Main.java:648*)
at org.eclipse.equinox.launcher.Main.basicRun(*Main.java:603*)
at org.eclipse.equinox.launcher.Main.run(*Main.java:1465*)
at org.eclipse.equinox.launcher.Main.main(*Main.java:1438*)
Here’s the code I’ve used:
*final* final GridCoverage2D *gridCoverage* = gcf.create("GridCoverage",
baseImage, mapPane.getDisplayArea());
*final* GridCoverage2D *geoGridCoverage* =
gridCoverage.view(ViewType.*GEOPHYSICS*);
Display.*getDefault*().syncExec(*new* Runnable() {
@Override
*public* *void* *run*() {
mapPane.getMapContext().addLayer(geoGridCoverage,
style);
gridCoverage.dispose(*true*);
geoGridCoverage.dispose(*true*);
}
});
Any advice on the "best practices" for such use-case?
In case you want to understand the question's context: I am developing a
TMS client to overlay tiles on a SwtMapPane as they are received from the
remote server.
Thanks in advance for any helping hand :)
-Piero
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