private static boolean canCreateGcpGeoCoding(final double[] tiePoints) {
int numTiePoints = tiePoints.length / 6;
if (numTiePoints >= GcpGeoCoding.Method.POLYNOMIAL3.getTermCountP()) {
return true;
} else if (numTiePoints >= GcpGeoCoding.Method.POLYNOMIAL2.getTermCountP()) {
return true;
} else if (numTiePoints >= GcpGeoCoding.Method.POLYNOMIAL1.getTermCountP()) {
return true;
} else {
return false;
}
}
private static void applyGcpGeoCoding(
final TiffFileInfo info, final double[] tiePoints, final Product product) {
int numTiePoints = tiePoints.length / 6;
final GcpGeoCoding.Method method;
if (numTiePoints >= GcpGeoCoding.Method.POLYNOMIAL3.getTermCountP()) {
method = GcpGeoCoding.Method.POLYNOMIAL3;
} else if (numTiePoints >= GcpGeoCoding.Method.POLYNOMIAL2.getTermCountP()) {
method = GcpGeoCoding.Method.POLYNOMIAL2;
} else if (numTiePoints >= GcpGeoCoding.Method.POLYNOMIAL1.getTermCountP()) {
method = GcpGeoCoding.Method.POLYNOMIAL1;
} else {
return; // not able to apply GCP geo coding; not enough tie points
}
final int width = product.getSceneRasterWidth();
final int height = product.getSceneRasterHeight();
final GcpDescriptor gcpDescriptor = GcpDescriptor.getInstance();
final ProductNodeGroup<Placemark> gcpGroup = product.getGcpGroup();
for (int i = 0; i < numTiePoints; i++) {
final int offset = i * 6;
final float x = (float) tiePoints[offset + 0];
final float y = (float) tiePoints[offset + 1];
final float lon = (float) tiePoints[offset + 3];
final float lat = (float) tiePoints[offset + 4];
if (Double.isNaN(x) || Double.isNaN(y) || Double.isNaN(lon) || Double.isNaN(lat)) {
continue;
}
final PixelPos pixelPos = new PixelPos(x, y);
final GeoPos geoPos = new GeoPos(lat, lon);
final Placemark gcp =
Placemark.createPointPlacemark(
gcpDescriptor, "gcp_" + i, "GCP_" + i, "", pixelPos, geoPos, product.getGeoCoding());
gcpGroup.add(gcp);
}
final Placemark[] gcps = gcpGroup.toArray(new Placemark[gcpGroup.getNodeCount()]);
final SortedMap<Integer, GeoKeyEntry> geoKeyEntries = info.getGeoKeyEntries();
final Datum datum = getDatum(geoKeyEntries);
product.setGeoCoding(new GcpGeoCoding(method, gcps, width, height, datum));
}