Hi;
I am trying to generate image according to the tile coordinate by geotools,
this is the code:
* public static void main(String[] args) throws IOException,
FactoryException, CQLException {*
* long st = System.currentTimeMillis();*
* FileDataStore store = new ShapefileDataStore(new
File("data/landuase.shp").toURI().toURL());*
* Style style = createPolygonStyle();*
* Layer layer = new FeatureLayer(store.getFeatureSource(), style);*
* MapContent map = new MapContent();*
* map.addLayer(layer);*
* double[] box = getWGS84LngLat(9275, 21747, 16);*
* ReferencedEnvelope bbox = new ReferencedEnvelope(box[0], box[2], box[1],
box[3], CRS.decode("EPSG:4326"));*
* //arender*
* Rectangle paintArea = new Rectangle(0, 0, 256, 256);*
* BufferedImage image = new BufferedImage(paintArea.width,
paintArea.height, BufferedImage.TYPE_INT_RGB);*
* Graphics2D gr = image.createGraphics();*
* gr.setPaint(Color.WHITE);*
* gr.fill(paintArea);*
* GTRenderer renderer = new StreamingRenderer();*
* renderer.setMapContent(map);*
* renderer.paint(gr, paintArea, bbox);*
* File fileToSave = new File("D:/t.png");*
* ImageIO.write(image, "png", fileToSave);*
* long ed = System.currentTimeMillis();*
* System.out.println("complete:" + (ed - st));*
* }*
* private static double[] getWGS84LngLat(int x, int y, int zoom) {*
* double padding = 0;*
* double left = (x - padding) * (360.0 / (1 << (zoom + 1))) - 180;*
* double right = (x + 1 + padding) * (360.0 / (1 << (zoom + 1))) - 180;*
* double top = 90 - (y - padding) * (180.0 / (1 << zoom));*
* double bottom = 90 - (y + 1 + padding) * (180.0 / (1 << zoom));*
* return new double[]{left, bottom, right, top};*
* }*
However the above code does not work for the calculated bbox. Once I set:
bbox = map.getMaxBounds()
I will get the correct result.
What's the problem?
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