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[Geotools-gt2-users] Image tutorial not working
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From: maca d. <mac...@gm...> - 2020-07-06 16:41:46
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<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>Hi, i was going through the image tutroial (<a href="https://docs.geotools.org/latest/userguide/tutorial/raster/image.html">https://docs.geotools.org/latest/userguide/tutorial/raster/image.html</a>). And just copy & pasted the wmslab class from the tutorial (from the extra things to try) and executed it. A swing window opens, which displays the wms, but as soon as i click the button to display the full extent of all layers without doing anything else i get a nullpointer:</div> <div> </div> <div>java.lang.NullPointerException<br/> at javax.media.jai.RenderedImageAdapter.getProperty(RenderedImageAdapter.java:189)<br/> at org.geotools.image.ImageWorker.extractNoDataProperty(ImageWorker.java:548)<br/> at org.geotools.image.ImageWorker.setImage(ImageWorker.java:567)<br/> at org.geotools.image.ImageWorker.<init>(ImageWorker.java:510)<br/> at org.geotools.renderer.lite.gridcoverage2d.GridCoverageRendererUtilities.affine(GridCoverageRendererUtilities.java:684)<br/> at org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer.affine(GridCoverageRenderer.java:515)<br/> at org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer.symbolize(GridCoverageRenderer.java:442)<br/> at org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer.renderImage(GridCoverageRenderer.java:761)<br/> at org.geotools.renderer.lite.gridcoverage2d.GridCoverageRenderer.paint(GridCoverageRenderer.java:910)<br/> at org.geotools.renderer.lite.StreamingRenderer$RenderCoverageReaderRequest.execute(StreamingRenderer.java:3900)<br/> at org.geotools.renderer.lite.StreamingRenderer$PainterThread.run(StreamingRenderer.java:4011)<br/> at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)<br/> at java.util.concurrent.FutureTask.run(Unknown Source)<br/> at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)<br/> at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)<br/> at java.lang.Thread.run(Unknown Source)<br/> </div> <div>Why does that happen? I tried multiple wms and it's the same for all. I didn't change the code, just copied from the tutorial.</div></div></body></html> |
