I am trying to overlay a shp file on wms layer using the example
http://docs.geotools.org/latest/userguide/tutorial/raster/image.html.
Each time I want to read the format of the file to get a reader I get this
error :
Exception in thread "main" java.lang.UnsupportedOperationException:
Trying to get a reader from an unknown format.
at org.geotools.coverage.grid.io.UnknownFormat.getReader(UnknownFormat.java:62)
at com.qedrix.map.maplotr.Demo1.displayLayers(Demo1.java:127)
at com.qedrix.map.maplotr.Demo1.main(Demo1.java:260)
My code follows:
public void displayLayers() {
File rasterFile = fetchWmsImage();
AbstractGridFormat format = GridFormatFinder.findFormat(rasterFile);
this.reader = format.getReader(rasterFile);
// Initially display the raster in greyscale using the
// data from the first image band
Style rasterStyle = createRGBStyle();
// Create a basic style with yellow lines and no fill
Style shpStyle = SLD.createPointStyle("point", Color.YELLOW,
Color.GRAY, 0.0f, 1.5f);
MapContent map = new MapContent();
map.setTitle("ImageLab");
MapViewport vp = new MapViewport();
org.geotools.map.Layer rasterLayer = new GridReaderLayer(reader,
rasterStyle);
map.addLayer(rasterLayer);
saveImage(map, "final.jpeg", 583);
}
public File fetchWmsImage() {
URL url = null;
try {
url = new
URL("http://184.106.187.247:8080/geoserver/rg/wms?version=1.1.0";);
} catch (MalformedURLException e) {
// will not happen
}
WebMapServer wms = null;
try {
wms = new WebMapServer(url);
WMSCapabilities capabilities = wms.getCapabilities();
Layer[] layers = WMSUtils.getNamedLayers(capabilities);
GetMapRequest request = wms.createGetMapRequest();
request.setFormat("image/png");
request.setDimensions("583", "420");
request.setTransparent(true);
request.setSRS("EPSG:900913");
request.setBBox("-13019428.542822,3922163.1648461,-13013051.407366,3929863.8567165");
//request.setProperty("isBaseLayer", "false");
//request.setProperty("opacity", ".2");
for (Layer layer : WMSUtils.getNamedLayers(capabilities)) {
if (layer.getName().equals("rg:parcels"))
request.addLayer(layer);
}
System.out.println(request.getFinalURL());
GetMapResponse response = (GetMapResponse) wms.issueRequest(request);
BufferedImage image = ImageIO.read(response.getInputStream());
File rasterFile = new
File("C:\\Users\\samabhik\\Workspace\\MAP\\data\\out.png");
ImageIO.write(image, "png", rasterFile);
try{
Thread.sleep(2000);
}catch(InterruptedException e){}
return rasterFile;
} catch (ServiceException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
}
return null;
}
I am using Maven so my dependency is this:
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-shapefile</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-swing</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-epsg-hsql</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-geotiff</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-image</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-wms</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-coverage</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-imageio-ext-gdal</artifactId>
<version>${geotools.version}</version>
</dependency>
I have JAI/ImageIO/Gdal native libs installed and using a JDK 32bit version.
I am using geotools version 9-SNAPSHOT
I even tested the geoserver WMS URL and it works:
http://184.106.187.247:8080/geoserver/rg/wms?SERVICE=WMS&LAYERS=rg:parcels&ISBASELAYER=false&FORMAT=image/png&OPACITY=.2&HEIGHT=420&TRANSPARENT=TRUE&REQUEST=GetMap&BBOX=-13019428.542822,3922163.1648461,-13013051.407366,3929863.8567165&WIDTH=583&STYLES=&SRS=EPSG:900913&VERSION=1.1.1
Just ran gdalinfo.exe to read the image content and it follows:
Driver: PNG/Portable Network Graphics Files:
....\Workspace\MAP\data\out2.png Size is 583, 420 Coordinate System is `'
Image Structure Metadata: INTERLEAVE=PIXEL Corner Coordinates: Upper Left (
0.0, 0.0) Lower Left ( 0.0, 420.0) Upper Right ( 583.0, 0.0) Lower Right (
583.0, 420.0) Center ( 291.5, 210.0) Band 1 Block=583x1 Type=Byte,
ColorInterp=Red Mask Flags: PER_DATASET ALPHA Band 2 Block=583x1 Type=Byte,
ColorInterp=Green Mask Flags: PER_DATASET ALPHA Band 3 Block=583x1
Type=Byte, ColorInterp=Blue Mask Flags: PER_DATASET ALPHA Band 4
Block=583x1 Type=Byte, ColorInterp=Alpha
Please help.
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