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copied!<p>Check that you have JAI and ImageIO avaialble. Either via maven dependency, or by installing them as Java Extensions as outlined in the Quickstart.</p> <ul> <li><a href="http://docs.geotools.org/latest/userguide/tutorial/quickstart/eclipse.html" rel="nofollow">http://docs.geotools.org/latest/userguide/tutorial/quickstart/eclipse.html</a></li> </ul> <p>Update:</p> <p>I was able to catch up on the GeoTools IRC channel and confirm this is an environment issue. In class <em>works for me</em> fashion I was able to connect using the WMSLab tutorial example to the WMS in question and display results.</p> <p>So lets check out "problem" environment::</p> <p>System.out.println( GeoTools.getAboutInfo() );</p> <p>Result::</p> <p>GeoTools version 9-SNAPSHOT (built from ree5a6830d2c774ee9a4eb9e024d989c2a1bcdfe3) Java version: 1.7.0_09 Operating system: Windows 7 6.1 GeoTools jars on classpath:</p> <p>A couple ideas:</p> <ul> <li>Check out the ImageLab to confirm JAI / ImageIO is availble?</li> </ul> <p>This worked!</p> <ul> <li>Save the image retrieved from the browser and try loading it using straight up Java</li> </ul> <p>Example from WorldImageReader::</p> <pre><code>File input = ... ImageInputStreamSpi inStreamSPI= ImageIOExt.getImageInputStreamSPI( input ); if (inStreamSPI == null) throw new IllegalStateException("Unsuppported"); </code></pre> <p>Apparently this was not successful?</p> <ul> <li>GeoTools has not gone through QA on Java 7 yet, downgrade to Java 6?</li> </ul> <p>Recently a Java 7 build box has been volunteered. When GeoTools works in Java 7 the release notes and tutorials will be updated.</p> <ul> <li>Especially on windows the implementation of PNG support is suspect.</li> </ul> <p>The following code from the uDig project disables the native implementation allowing the pure Java implementation to have a crack at it::</p> <pre><code> if (Platform.getOS().equals(Platform.OS_WIN32)) { try { // PNG native support is not very good .. this turns it off ImageUtilities.allowNativeCodec("png", ImageReaderSpi.class, false); //$NON-NLS-1$ } catch (Throwable t) { // we should not die if JAI is missing; we have a warning for that... System.out.println("Difficulty turnning windows native PNG support (which will result in scrambled images from WMS servers)"); //$NON-NLS-1$ t.printStackTrace(); } } </code></pre>

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