/**
* Initializes this operator and sets the one and only target product.
*
* <p>The target product can be either defined by a field of type {@link Product} annotated with
* the {@link TargetProduct TargetProduct} annotation or by calling {@link #setTargetProduct}
* method.
*
* <p>The framework calls this method after it has created this operator. Any client code that
* must be performed before computation of tile data should be placed here.
*
* @throws OperatorException If an error occurs during operator initialisation.
* @see #getTargetProduct()
*/
@Override
public void initialize() throws OperatorException {
try {
absRoot = AbstractMetadata.getAbstractedMetadata(sourceProduct);
getSourceImageDimension();
getMetadata();
computeSensorPositionsAndVelocities();
createTargetProduct();
if (externalDEMFile == null) {
DEMFactory.checkIfDEMInstalled(demName);
}
DEMFactory.validateDEM(demName, sourceProduct);
if (reGridMethod) {
computeDEMTraversalSampleInterval();
} else if (orbitMethod) {
meta = new SLCImage(absRoot);
jOrbit = new Orbit(absRoot, 3);
}
} catch (Throwable e) {
OperatorUtils.catchOperatorException(getId(), e);
}
}
/**
* Get elevation model.
*
* @throws Exception The exceptions.
*/
private synchronized void getElevationModel() throws Exception {
if (isElevationModelAvailable) return;
try {
if (externalDEMFile != null) { // if external DEM file is specified by user
dem = new FileElevationModel(externalDEMFile, demResamplingMethod, externalDEMNoDataValue);
demNoDataValue = externalDEMNoDataValue;
demName = externalDEMFile.getPath();
} else {
dem = DEMFactory.createElevationModel(demName, demResamplingMethod);
demNoDataValue = dem.getDescriptor().getNoDataValue();
}
} catch (Throwable t) {
t.printStackTrace();
}
isElevationModelAvailable = true;
}
/**
* Called by the framework in order to compute the stack of tiles for the given target bands.
*
* <p>The default implementation throws a runtime exception with the message "not implemented".
*
* @param targetTiles The current tiles to be computed for each target band.
* @param targetRectangle The area in pixel coordinates to be computed (same for all rasters in
* <code>targetRasters</code>).
* @param pm A progress monitor which should be used to determine computation cancelation
* requests.
* @throws OperatorException if an error occurs during computation of the target rasters.
*/
@Override
public void computeTileStack(
Map<Band, Tile> targetTiles, Rectangle targetRectangle, ProgressMonitor pm)
throws OperatorException {
final int x0 = targetRectangle.x;
final int y0 = targetRectangle.y;
final int w = targetRectangle.width;
final int h = targetRectangle.height;
// System.out.println("x0 = " + x0 + ", y0 = " + y0 + ", w = " + w + ", h = " + h);
double[] tileOverlapPercentage = {0.0, 0.0};
try {
if (!isElevationModelAvailable) {
getElevationModel();
}
computeTileOverlapPercentage(x0, y0, w, h, tileOverlapPercentage);
// System.out.println("x0 = " + x0 + ", y0 = " + y0 + ", w = " + w + ", h = " + h +
// ", tileOverlapPercentageMin = " + tileOverlapPercentage[0] +
// ", tileOverlapPercentageMax = " + tileOverlapPercentage[1]);
} catch (Exception e) {
throw new OperatorException(e);
}
final Tile latTile = targetTiles.get(targetProduct.getBand(LATITUDE_BAND_NAME));
final Tile lonTile = targetTiles.get(targetProduct.getBand(LONGITUDE_BAND_NAME));
final ProductData latData = latTile.getDataBuffer();
final ProductData lonData = lonTile.getDataBuffer();
final double[][] latArray = new double[h][w];
final double[][] lonArray = new double[h][w];
for (int r = 0; r < h; r++) {
Arrays.fill(latArray[r], noDataValue);
Arrays.fill(lonArray[r], noDataValue);
}
final int ymin = Math.max(y0 - (int) (tileSize * tileOverlapPercentage[1]), 0);
final int ymax = y0 + h + (int) (tileSize * Math.abs(tileOverlapPercentage[0]));
final int xmax = x0 + w;
final PositionData posData = new PositionData();
final GeoPos geoPos = new GeoPos();
try {
if (reGridMethod) {
final double[] latLonMinMax = new double[4];
computeImageGeoBoundary(x0, xmax, ymin, ymax, latLonMinMax);
final double latMin = latLonMinMax[0];
final double latMax = latLonMinMax[1];
final double lonMin = latLonMinMax[2];
final double lonMax = latLonMinMax[3];
final int nLat = (int) ((latMax - latMin) / delLat) + 1;
final int nLon = (int) ((lonMax - lonMin) / delLon) + 1;
final double[][] tileDEM = new double[nLat + 1][nLon + 1];
double alt;
for (int i = 0; i < nLat; i++) {
final double lat = latMin + i * delLat;
for (int j = 0; j < nLon; j++) {
double lon = lonMin + j * delLon;
if (lon >= 180.0) {
lon -= 360.0;
}
geoPos.setLocation(lat, lon);
alt = dem.getElevation(geoPos);
if (alt == demNoDataValue) {
continue;
}
tileDEM[i][j] = alt;
if (!getPosition(lat, lon, alt, x0, y0, w, h, posData)) {
continue;
}
final int ri = (int) Math.round(posData.rangeIndex);
final int ai = (int) Math.round(posData.azimuthIndex);
if (ri < x0 || ri >= x0 + w || ai < y0 || ai >= y0 + h) {
continue;
}
latArray[ai - y0][ri - x0] = lat;
lonArray[ai - y0][ri - x0] = lon;
}
}
} else {
final double[][] localDEM = new double[ymax - ymin + 2][w + 2];
final TileGeoreferencing tileGeoRef =
new TileGeoreferencing(sourceProduct, x0, ymin, w, ymax - ymin);
final boolean valid =
DEMFactory.getLocalDEM(
dem,
demNoDataValue,
demResamplingMethod,
tileGeoRef,
x0,
ymin,
w,
ymax - ymin,
sourceProduct,
true,
localDEM);
if (!valid) {
return;
}
for (int y = ymin; y < ymax; y++) {
final int yy = y - ymin;
for (int x = x0; x < xmax; x++) {
final int xx = x - x0;
double alt = localDEM[yy + 1][xx + 1];
if (alt == demNoDataValue) {
continue;
}
tileGeoRef.getGeoPos(x, y, geoPos);
if (!geoPos.isValid()) {
continue;
}
double lat = geoPos.lat;
double lon = geoPos.lon;
if (lon >= 180.0) {
lon -= 360.0;
}
if (orbitMethod) {
double[] latlon = jOrbit.lp2ell(new Point(x + 0.5, y + 0.5), meta);
lat = latlon[0] * Constants.RTOD;
lon = latlon[1] * Constants.RTOD;
alt = dem.getElevation(new GeoPos(lat, lon));
}
if (!getPosition(lat, lon, alt, x0, y0, w, h, posData)) {
continue;
}
final int ri = (int) Math.round(posData.rangeIndex);
final int ai = (int) Math.round(posData.azimuthIndex);
if (ri < x0 || ri >= x0 + w || ai < y0 || ai >= y0 + h) {
continue;
}
latArray[ai - y0][ri - x0] = lat;
lonArray[ai - y0][ri - x0] = lon;
}
}
}
// todo should replace the following code with Delaunay interpolation
final TileIndex trgIndex = new TileIndex(latTile);
for (int y = y0; y < y0 + h; y++) {
final int yy = y - y0;
trgIndex.calculateStride(y);
for (int x = x0; x < x0 + w; x++) {
final int xx = x - x0;
final int index = trgIndex.getIndex(x);
if (latArray[yy][xx] == noDataValue) {
latData.setElemDoubleAt(index, fillHole(xx, yy, latArray));
} else {
latData.setElemDoubleAt(index, latArray[yy][xx]);
}
if (lonArray[yy][xx] == noDataValue) {
lonData.setElemDoubleAt(index, fillHole(xx, yy, lonArray));
} else {
lonData.setElemDoubleAt(index, lonArray[yy][xx]);
}
}
}
} catch (Throwable e) {
OperatorUtils.catchOperatorException(getId(), e);
}
}