Hi ,
i am using geotools . I am trying to view Image(jpg) using WorldImageReader.
but it cann't works properly and does't plot anything on map pane.
my code is :
WorldImageReader wrldImage = new WorldImageReader(imgURL);
GridCoverage2D gcDem = (GridCoverage2D)wrldImage.read(null);
GeneralEnvelope env = (GeneralEnvelope)gcDem.getEnvelope();
ReferencedEnvelope refEnv = new ReferencedEnvelope( new com.vividsolutions.jts.geom.Envelope(env.getUpperCorner().getOrdinate(0), // X1
env.getLowerCorner().getOrdinate(0), // X2
env.getUpperCorner().getOrdinate(1), // Y1
env.getLowerCorner().getOrdinate(1)), // Y2
map.getCoordinateReferenceSystem()
);
setMapArea(refEnv);
StyleBuilder sb = new StyleBuilder();
RasterSymbolizer rsDem = sb.createRasterSymbolizer();
Style demStyle = sb.createStyle(rsDem);
StreamingRenderer renderer = new
StreamingRenderer();
setRenderer(renderer);
setContext(map);
*************ERROR*************
Nov 1, 2006 12:26:22 PM org.geotools.renderer.lite.StreamingRenderer processStylers
SEVERE: null
java.lang.NullPointerException
at com.vividsolutions.jts.geom.Envelope.init(Envelope.java:254)
at com.vividsolutions.jts.geom.Envelope.<init>(Envelope.java:186)
at
org.geotools.geometry.jts.ReferencedEnvelope.<init>(ReferencedEnvelope.java:112)
at org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer.<init>(GridCoverageRenderer.java:158)
at org.geotools.renderer.lite.StreamingRenderer.renderRaster(StreamingRenderer.java:1719)
at org.geotools.renderer.lite.StreamingRenderer.processSymbolizers(StreamingRenderer.java:1580)
at org.geotools.renderer.lite.StreamingRenderer.process(StreamingRenderer.java:1524)
at
org.geotools.renderer.lite.StreamingRenderer.processStylers(StreamingRenderer.java:1466)
at org.geotools.renderer.lite.StreamingRenderer.paint(StreamingRenderer.java:531)
at org.geotools.renderer.lite.StreamingRenderer.paint(StreamingRenderer.java:395)
at org.geotools.gui.swing.JMapPane.paintComponent(JMapPane.java:414)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown
Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JLayeredPane.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paintWithOffscreenBuffer(Unknown Source)
at javax.swing.JComponent.paintDoubleBuffered(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
at java.awt.Container.paint(Unknown Source)
at sun.awt.RepaintArea.paintComponent(Unknown Source)
at sun.awt.RepaintArea.paint(Unknown Source)
at
sun.awt.windows.WComponentPeer.handleEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
PLZ TELL ME HOW CAN I RESOLVE THIS PROBLEM.
THNX YOU
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