I have we have to develop a GIS web application from the scratch using
geotools library 2.6
I developed a servlet dispatching png e openlayers like client.
I noticed sometimes my map is rotated, so using a geotools example I tried
to save the png on the fylesystem
and the map still looks rotated (flipped horizontally and rotated 90°) while
on JMapFrame looks good , this is the code I use. Please help !! :-)
public class Quickstart {
public static void main(String[] args) throws Exception {
java.util.Map<Object,Object> params = new
java.util.HashMap<Object,Object>();
params.put(PostgisDataStoreFactory.DBTYPE.key, "postgis");
params.put(PostgisDataStoreFactory.HOST.key, "localhost");
params.put(PostgisDataStoreFactory.PORT.key, 5432);
params.put(PostgisDataStoreFactory.SCHEMA.key, "public");
params.put(PostgisDataStoreFactory.DATABASE.key, "IPER_MOB");
params.put(PostgisDataStoreFactory.USER.key, "postgres");
params.put(PostgisDataStoreFactory.PASSWD.key, "password");
DataStore dataStore=DataStoreFinder.getDataStore(params);
FeatureSource aa = dataStore.getFeatureSource("pisa_linee");
MapContext map2 = new CustomMapContext();
map2.setTitle("Quickstart");
map2.addLayer(aa, null);
ReferencedEnvelope bbox = new
ReferencedEnvelope(10.2744388580322,10.5848665237427,43.4382019042969,43.7542610168457,CRS.decode("EPSG:4269"));
map2.setAreaOfInterest((ReferencedEnvelope)bbox,CRS.decode("EPSG:4269"));
GTRenderer renderer = new StreamingRenderer();
renderer.setContext( map2);
Rectangle imageBounds=null;
try{
int imageWidth = 800;
imageBounds = new Rectangle(0, 0, imageWidth, 600);
}catch(Exception e){
System.out.println("Eccezione "+e);
}
BufferedImage image = new
BufferedImage(imageBounds.width,imageBounds.height,BufferedImage.BITMASK);
Graphics2D gr = image.createGraphics();
gr.setPaint(Color.WHITE);
gr.fill(imageBounds);
try {
renderer.paint(gr, imageBounds, map2.getAreaOfInterest());
File fileToSave = new File("c:\\daddexstuff\\tmp\\test.jpg");
ImageIO.write(image, "jpeg", fileToSave);
}catch(IOException e){
}
JMapFrame.showMap(map2);
}
}
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