Hi Ratnadeep, The format for world files is detailed here:
http://docs.geotools.org/latest/userguide/library/coverage/image.html#world-file Michael On 5 November 2012 01:48, Ratnadeep Raxsith <[email protected]> wrote: > OK. Now after much banging the head on the wall, I came to realize that my > code would only work if I have a .pgw (world) file along with the .png file > I get from the WMS server. Now can anyone tell me how do I make a .pgw file > from geotools or even geoserver? I am completely stuck :( > > > On Sun, Nov 4, 2012 at 10:36 AM, Ratnadeep Raxsith <[email protected]> wrote: >> >> 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. >> >> >> > > > ------------------------------------------------------------------------------ > LogMeIn Central: Instant, anywhere, Remote PC access and management. > Stay in control, update software, and manage PCs from one command center > Diagnose problems and improve visibility into emerging IT issues > Automate, monitor and manage. Do more in less time with Central > http://p.sf.net/sfu/logmein12331_d2d > _______________________________________________ > GeoTools-GT2-Users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > ------------------------------------------------------------------------------ LogMeIn Central: Instant, anywhere, Remote PC access and management. Stay in control, update software, and manage PCs from one command center Diagnose problems and improve visibility into emerging IT issues Automate, monitor and manage. Do more in less time with Central http://p.sf.net/sfu/logmein12331_d2d _______________________________________________ GeoTools-GT2-Users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
