Hello- I have attached a minor update to the saveImage function posted here:
http://docs.geotools.org/latest/userguide/library/render/gtrenderer.html
The updated code does 2 things:
(1) Sets the correct aspect ratio for maps with projections that use
easting,northing (vs x,y) like EPSG:4326
(2) Uses the viewport extents of the map if it has been set. Otherwise, uses
the map extents.
For your consideration...
Thanks,Peter
public void saveImage(final MapContent map, final String file, final int
imageWidth) {
GTRenderer renderer = new StreamingRenderer();
renderer.setMapContent(map);
Rectangle imageBounds = null;
ReferencedEnvelope mapBounds = null;
try {
mapBounds = map.getViewport().getBounds();
//If the viewport bounds are not set, set bounds to map extents
if (mapBounds.getMaxX()==-1) mapBounds = map.getMaxBounds();
double heightToWidth = mapBounds.getSpan(1) / mapBounds.getSpan(0);
//If the axis order is y,x (e.g. lat,lon) modify the aspect ratio
if
(mapBounds.getCoordinateReferenceSystem().getCoordinateSystem().getAxis(0).getDirection().equals(AxisDirection.NORTH)){
heightToWidth = mapBounds.getSpan(0) / mapBounds.getSpan(1);
}
imageBounds = new Rectangle(
0, 0, imageWidth, (int) Math.round(imageWidth * heightToWidth));
} catch (Exception e) {
// failed to access map layers
throw new RuntimeException(e);
}
BufferedImage image = new BufferedImage(imageBounds.width,
imageBounds.height, BufferedImage.TYPE_INT_RGB);
Graphics2D gr = image.createGraphics();
gr.setPaint(Color.WHITE);
gr.fill(imageBounds);
try {
renderer.paint(gr, imageBounds, mapBounds);
File fileToSave = new File(file);
ImageIO.write(image, "jpeg", fileToSave);
} catch (java.io.IOException e) {
throw new RuntimeException(e);
}
}------------------------------------------------------------------------------
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