Sigh...
Here's the example again with the unnecessary loops and call to
getTile omitted. I quickly hacked the example from something else but
not carefully enough.
Michael
package org.geotools.demo.coverage;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.io.File;
import javax.media.jai.ImageLayout;
import javax.media.jai.JAI;
import javax.media.jai.ParameterBlockJAI;
import javax.media.jai.RenderedOp;
import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.coverage.grid.GridCoverageFactory;
import org.geotools.gce.geotiff.GeoTiffWriter;
import org.geotools.geometry.jts.ReferencedEnvelope;
import org.geotools.swing.data.JFileDataStoreChooser;
/**
* This example illustrates creating a large coverage, avoiding the need to hold
* all of the data in memory at one time.
*
* @author Michael Bedward
*/
public class BigCoverage {
private static final int IMAGE_WIDTH = 10000;
private static final int IMAGE_HEIGHT = 10000;
public static void main(String[] args) throws Exception {
JFileDataStoreChooser chooser = new JFileDataStoreChooser("tif");
chooser.setDialogTitle("Create GeoTiff file");
File file = null;
if (chooser.showSaveDialog(null) ==
JFileDataStoreChooser.APPROVE_OPTION) {
file = chooser.getSelectedFile();
}
if (file == null) {
return;
}
ParameterBlockJAI pb = new ParameterBlockJAI("Constant");
pb.setParameter("width", (float)IMAGE_WIDTH);
pb.setParameter("height", (float)IMAGE_HEIGHT);
pb.setParameter("bandValues", new Double[]{0.0d});
final int tileWidth = 512;
ImageLayout layout = new ImageLayout();
layout.setTileWidth(tileWidth);
layout.setTileHeight(tileWidth);
RenderingHints hints = new RenderingHints(JAI.KEY_IMAGE_LAYOUT, layout);
RenderedOp image = JAI.create("Constant", pb, hints);
GeoTiffWriter writer = new GeoTiffWriter(file, null);
GridCoverageFactory factory = new GridCoverageFactory();
ReferencedEnvelope env = new ReferencedEnvelope(
new Rectangle(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT), null);
GridCoverage2D coverage = factory.create("coverage", image, env);
writer.write(coverage, null);
}
}
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