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ExportImageOrElevations.java
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ExportImageOrElevations.java
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/*
* Copyright 2006-2009, 2017, 2020 United States Government, as represented by the
* Administrator of the National Aeronautics and Space Administration.
* All rights reserved.
*
* The NASA World Wind Java (WWJ) platform is licensed under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed
* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*
* NASA World Wind Java (WWJ) also contains the following 3rd party Open Source
* software:
*
* Jackson Parser – Licensed under Apache 2.0
* GDAL – Licensed under MIT
* JOGL – Licensed under Berkeley Software Distribution (BSD)
* Gluegen – Licensed under Berkeley Software Distribution (BSD)
*
* A complete listing of 3rd Party software notices and licenses included in
* NASA World Wind Java (WWJ) can be found in the WorldWindJava-v2.2 3rd-party
* notices and licenses PDF found in code directory.
*/
package gov.nasa.worldwindx.examples;
import gov.nasa.worldwind.Configuration;
import gov.nasa.worldwind.avlist.*;
import gov.nasa.worldwind.data.*;
import gov.nasa.worldwindx.examples.util.SectorSelector;
import gov.nasa.worldwind.formats.tiff.GeotiffWriter;
import gov.nasa.worldwind.geom.*;
import gov.nasa.worldwind.globes.*;
import gov.nasa.worldwind.layers.*;
import gov.nasa.worldwind.render.DrawContext;
import gov.nasa.worldwind.util.Logging;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.beans.*;
import java.io.*;
import java.util.*;
/**
* Demonstrates how to use the {@link SectorSelector} utility to save selected image or/and elevations to a GeoTIFF
* file. Click "Start selection", select a region on the globe, and then click "Save elevations..." to export elevation
* data for the selected region to a GeoTIFF, or "Save image..." to export imagery.
*
* @author Lado Garakanidze
* @version $Id: ExportImageOrElevations.java 2109 2014-06-30 16:52:38Z tgaskins $
*/
public class ExportImageOrElevations extends ApplicationTemplate
{
public static class AppFrame extends ApplicationTemplate.AppFrame
{
private static final double MISSING_DATA_SIGNAL = (double) Short.MIN_VALUE;
private JButton btnSaveElevations = null;
private JButton btnSaveImage = null;
private Sector selectedSector = null;
private JFileChooser fileChooser = null;
private SectorSelector selector;
public AppFrame()
{
super(true, true, false);
this.selector = new SectorSelector(getWwd());
this.selector.setInteriorColor(new Color(1f, 1f, 1f, 0.1f));
this.selector.setBorderColor(new Color(1f, 0f, 0f, 0.5f));
this.selector.setBorderWidth(3);
JPanel btnPanel = new JPanel(new GridLayout(5, 1, 0, 5));
{
JButton
// Set up a button to enable and disable region selection.
btn = new JButton(new EnableSelectorAction());
btn.setToolTipText("Press Start then press and drag button 1 on globe");
btnPanel.add(btn);
btnSaveElevations = new JButton(new SaveElevationsAction());
btnSaveElevations.setEnabled(false);
btnSaveElevations.setToolTipText("Click the button to save elevations of the selected area");
btnPanel.add(btnSaveElevations);
btnSaveImage = new JButton(new SaveImageAction());
btnSaveImage.setEnabled(false);
btnSaveImage.setToolTipText("Click the button to save image of the selected area");
btnPanel.add(btnSaveImage);
}
this.getControlPanel().add(btnPanel, BorderLayout.SOUTH);
// Listen for changes to the sector selector's region. Could also just wait until the user finishes
// and query the result using selector.getSector().
this.selector.addPropertyChangeListener(SectorSelector.SECTOR_PROPERTY, new PropertyChangeListener()
{
public void propertyChange(PropertyChangeEvent evt)
{
Sector sector = (Sector) evt.getNewValue();
if (null != sector)
{
selectedSector = sector;
btnSaveElevations.setEnabled(true);
btnSaveImage.setEnabled(true);
}
}
});
this.enableNAIPLayer();
}
private class SaveElevationsAction extends AbstractAction
{
public SaveElevationsAction()
{
super("Save elevations ...");
}
public void actionPerformed(ActionEvent e)
{
doSaveElevations();
}
}
private class SaveImageAction extends AbstractAction
{
public SaveImageAction()
{
super("Save image ...");
}
public void actionPerformed(ActionEvent e)
{
doSaveImage();
}
}
private class EnableSelectorAction extends AbstractAction
{
public EnableSelectorAction()
{
super("Start selection");
}
public void actionPerformed(ActionEvent e)
{
((JButton) e.getSource()).setAction(new DisableSelectorAction());
selector.enable();
}
}
private class DisableSelectorAction extends AbstractAction
{
public DisableSelectorAction()
{
super("Clear selection");
}
public void actionPerformed(ActionEvent e)
{
selector.disable();
btnSaveElevations.setEnabled(false);
btnSaveImage.setEnabled(false);
selectedSector = null;
((JButton) e.getSource()).setAction(new EnableSelectorAction());
}
}
public static class GeotiffFileFilter extends javax.swing.filechooser.FileFilter
{
public boolean accept(File file)
{
if (file == null)
{
String message = Logging.getMessage("nullValue.FileIsNull");
Logging.logger().severe(message);
throw new IllegalArgumentException(message);
}
return file.isDirectory() || file.getName().toLowerCase().endsWith(".tif");
}
public String getDescription()
{
return "Geo-TIFF (tif)";
}
}
private File selectDestinationFile(String title, String filename)
{
File destFile = null;
if (this.fileChooser == null)
{
this.fileChooser = new JFileChooser();
this.fileChooser.setCurrentDirectory(new File(Configuration.getUserHomeDirectory()));
this.fileChooser.addChoosableFileFilter(new GeotiffFileFilter());
}
this.fileChooser.setDialogTitle(title);
this.fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
this.fileChooser.setMultiSelectionEnabled(false);
this.fileChooser.setDialogType(JFileChooser.SAVE_DIALOG);
this.fileChooser.setName(filename);
int status = this.fileChooser.showSaveDialog(null);
if (status == JFileChooser.APPROVE_OPTION)
{
destFile = this.fileChooser.getSelectedFile();
if (!destFile.getName().endsWith(".tif"))
destFile = new File(destFile.getPath() + ".tif");
}
return destFile;
}
public void doSaveElevations()
{
final File saveToFile = this.selectDestinationFile(
"Select a destination GeoTiff file to save elevations", "elevation");
if (saveToFile == null)
return;
final JOptionPane jop = new JOptionPane("Requesting elevations ...",
JOptionPane.PLAIN_MESSAGE, JOptionPane.DEFAULT_OPTION, null, new Object[] {}, null);
final JDialog jd = jop.createDialog(this.getRootPane().getTopLevelAncestor(), "Please wait...");
jd.setModal(false);
jd.setVisible(true);
Thread t = new Thread(new Runnable()
{
public void run()
{
try
{
int[] size = adjustSize(selectedSector, 512);
int width = size[0], height = size[1];
double[] elevations = readElevations(selectedSector, width, height);
if (null != elevations)
{
jd.setTitle("Writing elevations to " + saveToFile.getName());
writeElevationsToFile(selectedSector, width, height, elevations, saveToFile);
jd.setVisible(false);
JOptionPane.showMessageDialog(wwjPanel,
"Elevations saved into the " + saveToFile.getName());
}
else
{
jd.setVisible(false);
JOptionPane.showMessageDialog(wwjPanel,
"Attempt to save elevations to the " + saveToFile.getName() + " has failed.");
}
}
catch (Exception e)
{
e.printStackTrace();
jd.setVisible(false);
JOptionPane.showMessageDialog(wwjPanel, e.getMessage());
}
finally
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
setCursor(Cursor.getDefaultCursor());
getWwd().redraw();
jd.setVisible(false);
}
});
}
}
});
this.setCursor(new Cursor(Cursor.WAIT_CURSOR));
this.getWwd().redraw();
t.start();
}
public void enableNAIPLayer()
{
LayerList list = this.getWwd().getModel().getLayers();
ListIterator iterator = list.listIterator();
while (iterator.hasNext())
{
Layer layer = (Layer) iterator.next();
if (layer.getName().contains("NAIP"))
{
layer.setEnabled(true);
break;
}
}
}
public void doSaveImage()
{
TiledImageLayer currentLayer = null;
LayerList list = this.getWwd().getModel().getLayers();
DrawContext dc = this.getWwd().getSceneController().getDrawContext();
ListIterator iterator = list.listIterator();
while (iterator.hasNext())
{
Object o = iterator.next();
if (o instanceof TiledImageLayer)
{
TiledImageLayer layer = (TiledImageLayer) o;
if (layer.isEnabled() && layer.isLayerActive(dc) && layer.isLayerInView(dc))
{
currentLayer = layer;
}
}
}
if (null == currentLayer)
return;
final File saveToFile = this.selectDestinationFile("Select a destination GeoTiff file to save the image",
"image");
if (saveToFile == null)
return;
final TiledImageLayer activeLayer = currentLayer;
final JOptionPane jop = new JOptionPane("Requesting image ...",
JOptionPane.PLAIN_MESSAGE, JOptionPane.DEFAULT_OPTION, null, new Object[] {}, null);
final JDialog jd = jop.createDialog(this.getRootPane().getTopLevelAncestor(), "Please wait...");
jd.setModal(false);
jd.setVisible(true);
Thread t = new Thread(new Runnable()
{
public void run()
{
try
{
BufferedImage image = captureImage(activeLayer, selectedSector, 2048);
if (null != image)
{
jd.setTitle("Writing image to " + saveToFile.getName());
writeImageToFile(selectedSector, image, saveToFile);
jd.setVisible(false);
JOptionPane.showMessageDialog(wwjPanel, "Image saved into the " + saveToFile.getName());
}
else
{
jd.setVisible(false);
JOptionPane.showMessageDialog(wwjPanel,
"Attempt to save image to the " + saveToFile.getName() + " has failed.");
}
}
catch (Exception e)
{
e.printStackTrace();
jd.setVisible(false);
JOptionPane.showMessageDialog(wwjPanel, e.getMessage());
}
finally
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
setCursor(Cursor.getDefaultCursor());
getWwd().redraw();
jd.setVisible(false);
}
});
}
}
});
this.setCursor(new Cursor(Cursor.WAIT_CURSOR));
this.getWwd().redraw();
t.start();
}
private int[] adjustSize(Sector sector, int desiredSize)
{
int[] size = new int[] {desiredSize, desiredSize};
if (null != sector && desiredSize > 0)
{
LatLon centroid = sector.getCentroid();
Angle dLat = LatLon.greatCircleDistance(new LatLon(sector.getMinLatitude(), sector.getMinLongitude()),
new LatLon(sector.getMaxLatitude(), sector.getMinLongitude()));
Angle dLon = LatLon.greatCircleDistance(new LatLon(centroid.getLatitude(), sector.getMinLongitude()),
new LatLon(centroid.getLatitude(), sector.getMaxLongitude()));
double max = Math.max(dLat.radians, dLon.radians);
double min = Math.min(dLat.radians, dLon.radians);
int minSize = (int) ((min == 0d) ? desiredSize : ((double) desiredSize * min / max));
if (dLon.radians > dLat.radians)
{
size[0] = desiredSize; // width
size[1] = minSize; // height
}
else
{
size[0] = minSize; // width
size[1] = desiredSize; // height
}
}
return size;
}
private BufferedImage captureImage(TiledImageLayer layer, Sector sector, int minSize)
throws Exception
{
int[] size = this.adjustSize(sector, minSize);
int width = size[0], height = size[1];
String mimeType = layer.getDefaultImageFormat();
if (layer.isImageFormatAvailable("image/png"))
mimeType = "image/png";
else if (layer.isImageFormatAvailable("image/jpg"))
mimeType = "image/jpg";
return layer.composeImageForSector(this.selectedSector, width, height, 1d, -1, mimeType, true, null, 30000);
}
private double[] readElevations(Sector sector, int width, int height)
{
double[] elevations;
double latMin = sector.getMinLatitude().radians;
double latMax = sector.getMaxLatitude().radians;
double dLat = (latMax - latMin) / (double) (height - 1);
double lonMin = sector.getMinLongitude().radians;
double lonMax = sector.getMaxLongitude().radians;
double dLon = (lonMax - lonMin) / (double) (width - 1);
ArrayList<LatLon> latlons = new ArrayList<LatLon>(width * height);
int maxx = width - 1, maxy = height - 1;
double lat = latMin;
for (int y = 0; y < height; y++)
{
double lon = lonMin;
for (int x = 0; x < width; x++)
{
latlons.add(LatLon.fromRadians(lat, lon));
lon = (x == maxx) ? lonMax : (lon + dLon);
}
lat = (y == maxy) ? latMax : (lat + dLat);
}
try
{
Globe globe = this.getWwd().getModel().getGlobe();
ElevationModel model = globe.getElevationModel();
elevations = new double[latlons.size()];
Arrays.fill(elevations, MISSING_DATA_SIGNAL);
// retrieve elevations
model.composeElevations(sector, latlons, width, elevations);
}
catch (Exception e)
{
e.printStackTrace();
elevations = null;
}
return elevations;
}
private void writeImageToFile(Sector sector, BufferedImage image, File gtFile)
throws IOException
{
AVList params = new AVListImpl();
params.setValue(AVKey.SECTOR, sector);
params.setValue(AVKey.COORDINATE_SYSTEM, AVKey.COORDINATE_SYSTEM_GEOGRAPHIC);
params.setValue(AVKey.PIXEL_FORMAT, AVKey.IMAGE);
params.setValue(AVKey.BYTE_ORDER, AVKey.BIG_ENDIAN);
GeotiffWriter writer = new GeotiffWriter(gtFile);
try
{
writer.write(BufferedImageRaster.wrapAsGeoreferencedRaster(image, params));
}
finally
{
writer.close();
}
}
private void writeElevationsToFile(Sector sector, int width, int height, double[] elevations, File gtFile)
throws IOException
{
// These parameters are required for writeElevation
AVList elev32 = new AVListImpl();
elev32.setValue(AVKey.SECTOR, sector);
elev32.setValue(AVKey.WIDTH, width);
elev32.setValue(AVKey.HEIGHT, height);
elev32.setValue(AVKey.COORDINATE_SYSTEM, AVKey.COORDINATE_SYSTEM_GEOGRAPHIC);
elev32.setValue(AVKey.PIXEL_FORMAT, AVKey.ELEVATION);
elev32.setValue(AVKey.DATA_TYPE, AVKey.FLOAT32);
elev32.setValue(AVKey.ELEVATION_UNIT, AVKey.UNIT_METER);
elev32.setValue(AVKey.BYTE_ORDER, AVKey.BIG_ENDIAN);
elev32.setValue(AVKey.MISSING_DATA_SIGNAL, MISSING_DATA_SIGNAL);
ByteBufferRaster raster = (ByteBufferRaster) ByteBufferRaster.createGeoreferencedRaster(elev32);
// copy elevation values to the elevation raster
int i = 0;
for (int y = height - 1; y >= 0; y--)
{
for (int x = 0; x < width; x++)
{
raster.setDoubleAtPosition(y, x, elevations[i++]);
}
}
GeotiffWriter writer = new GeotiffWriter(gtFile);
try
{
writer.write(raster);
}
finally
{
writer.close();
}
}
}
public static void main(String[] args)
{
// zoom to San Francisco downtown
Configuration.setValue(AVKey.INITIAL_ALTITUDE, 1000d);
Configuration.setValue(AVKey.INITIAL_LATITUDE, 37.7794d);
Configuration.setValue(AVKey.INITIAL_LONGITUDE, -122.4192d);
ApplicationTemplate.start("WorldWind Exporting Surface Imagery and Elevations", AppFrame.class);
}
}