Re: [Geotools-gt2-users] (no subject)

[Michael B. <mic...@gm...>]

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 <qe...@gm...> 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 <qe...@gm...> 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.
>>
>>
>>
>
>
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