//**********************************************************************
//
//<copyright>
//
//BBN Technologies
//10 Moulton Street
//Cambridge, MA 02138
//(617) 873-8000
//
//Copyright (C) BBNT Solutions LLC. All rights reserved.
//
//</copyright>
//**********************************************************************
//
//$Source:
///cvs/darwars/ambush/aar/src/com/bbn/ambush/mission/MissionHandler.java,v
//$
//$RCSfile: GeoTIFFModelFactory.java,v $
//$Revision: 1.2.2.3 $
//$Date: 2007/01/22 15:52:58 $
//$Author: dietrick $
//
//**********************************************************************
package com.bbn.openmap.dataAccess.image.geotiff;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.geotiff.image.KeyRegistry;
import org.geotiff.image.jai.GeoTIFFDirectory;
import com.bbn.openmap.dataAccess.image.ErrImageTile;
import com.bbn.openmap.dataAccess.image.ImageTile;
public class GeoTIFFModelFactory {
public static Logger logger = Logger.getLogger("com.bbn.openmap.dataAccess.geotiff.GeoTIFFModelFactory");
protected GeoTIFFFile gtfFile;
public GeoTIFFModelFactory(GeoTIFFFile gtf) {
gtfFile = gtf;
}
public ImageTile getImageTile() throws IOException {
return getImageTile(null, null);
}
public ImageTile getImageTile(GeoTIFFImageReader gtid,
ImageTile.Cache cache) throws IOException {
int modelType = gtfFile.getModelType();
ImageTile ret = null;
String errorMessage = null;
/*
* ModelTypeProjected = 1 (Projection Coordinate System)
* ModelTypeGeographic = 2 Geographic latitude-longitude System)
* ModelTypeGeocentric = 3 (Geocentric (X,Y,Z) Coordinate System)
*/
int modelID = -1;
switch (modelType) {
case 1:
modelID = gtfFile.getProjectedCSType();
errorMessage = "Projection Model type (" + modelID + ", "
+ KeyRegistry.getKey(KeyRegistry.EPSG_PCS, modelID)
+ ") not handled yet";
if (logger.isLoggable(Level.FINE)) {
logger.info(errorMessage);
}
ret = new ErrImageTile("Image can't be positioned: "
+ errorMessage);
break;
case 2:
case 3:
modelID = gtfFile.getGeographicType();
if (logger.isLoggable(Level.FINE)) {
logger.info("GeoModel type (" + modelID + "): "
+ KeyRegistry.getKey(KeyRegistry.EPSG_GCS, modelID));
}
switch (modelID) {
case 4326:
ret = get4326(gtid, cache);
break;
default:
errorMessage = "GeoModel type (" + modelID + ", "
+ KeyRegistry.getKey(KeyRegistry.EPSG_GCS, modelID)
+ ") not handled yet";
logger.info(errorMessage);
ret = new ErrImageTile("Image can't be positioned: "
+ errorMessage);
}
}
return ret;
}
protected ImageTile get4326(GeoTIFFImageReader gtid, ImageTile.Cache cache)
throws IOException {
// GCS_WGS_84
GeoTIFFDirectory gtfd = gtfFile.getGtfDirectory();
// There's got to be a way to figure out the pixel height and width of
// the image without having to create the BufferedImage. We need those
// for georeferencing the lower right corner right now, but it would be
// good to only create the image if an ImageDecoder and cache weren't
// provided.
double[] tiePoints = gtfd.getTiepoints();
double[] scaleMatrix = gtfd.getPixelScale();
int imageWidth = gtfFile.getFieldIntValue(256);
int imageHeight = gtfFile.getFieldIntValue(257);
double ulat = tiePoints[4] + tiePoints[1] * scaleMatrix[1];
double llon = tiePoints[3] - tiePoints[0] * scaleMatrix[0];
double llat = tiePoints[4] - imageHeight * scaleMatrix[1];
double rlon = tiePoints[3] + imageWidth * scaleMatrix[0];
if (logger.isLoggable(Level.FINE)) {
logger.info("Image should be at: " + ulat + ", " + llon
+ " - to - " + llat + ", " + rlon);
}
if (gtid == null) {
BufferedImage bi = gtfFile.getBufferedImage();
return new ImageTile((float) ulat, (float) llon, (float) llat, (float) rlon, bi);
} else {
return new ImageTile((float) ulat, (float) llon, (float) llat, (float) rlon, gtid, cache);
}
}
}