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/*
* This file is part of PetaScope.
*
* PetaScope is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* PetaScope is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with PetaScope. If not, see <http://www.gnu.org/licenses/>.
*
* For more information please see <http://www.PetaScope.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*
* Copyright 2009 Jacobs University Bremen, Peter Baumann.
*/
package petascope.wcps.server.core;
import java.util.Iterator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import petascope.wcps.server.exceptions.WCPSException;
import org.w3c.dom.*;
import petascope.wcps.server.exceptions.InvalidCrsException;
import petascope.wcs.server.exceptions.NoApplicableCodeException;
public class Crs implements IRasNode {
Logger LOG = LoggerFactory.getLogger(Crs.class);
private String crsName;
public Crs(Node node, XmlQuery xq) throws WCPSException, InvalidCrsException {
System.err.println("Parsing crs name ...");
while ((node != null) && node.getNodeName().equals("#text")) {
node = node.getNextSibling();
}
if (node != null && node.getNodeName().equals("srsName")) {
String val = node.getTextContent();
this.crsName = val;
if (crsName.equals(DomainElement.IMAGE_CRS) || crsName.equals(DomainElement.WGS84_CRS)) {
System.err.println("Found CRS: " + crsName);
} else {
throw new InvalidCrsException("Invalid CRS: '" + crsName + "'");
}
} else {
throw new WCPSException("Could not find a 'srsName' node !");
}
}
/***
* Converts an array of 4 coordinates (bounding box) expressed in the
* current CRS to pixel coordinates.
* @param u2 Left-most X point (CRS coordinate)
* @param u3 Right-most X point (CRS coordinate)
* @param v2 Lower-most Y point (CRS coordinate)
* @param v3 Upper-most Y point (CRS coordinate)
* @return array of integers, pixel coordinates that represent the given CRS
* coordinates.
*/
public long[] convertToPixelCoordinates(Metadata meta, String axisName, Double u2, Double u3, Double v2, Double v3) throws NoApplicableCodeException {
Wgs84Crs crs = meta.getCrs();
long px0 = -1, px1 = -1, py0 = -1, py1 = -1;
// Convert bounding box values to pixel coordinates
if (crsName.equals(DomainElement.WGS84_CRS)) {
LOG.trace("Converting WGS84 axis {} interval to pixel coordinates ...", axisName);
/* Image coordinates */
Iterator<CellDomainElement> it = meta.getCellDomainIterator();
CellDomainElement X = it.next();
CellDomainElement Y = it.next();
if (X == null || Y == null) {
LOG.error("Could not find the X or Y axis for coverage: " + meta.getCoverageName());
throw new NoApplicableCodeException("Could not find the X or Y axis for coverage: " + meta.getCoverageName());
}
int x0 = X.getLo().intValue();
int x1 = X.getHi().intValue();
int y0 = Y.getLo().intValue();
int y1 = Y.getHi().intValue();
LOG.trace("Pixel Coordinates: X01 (" + x0 + "," + x1 + ") + Y01 (" + y0 + "," + y1 + ")");
/* CRS span */
double x2 = crs.getLow1();
double y2 = crs.getLow2();
double x3 = crs.getHigh1();
double y3 = crs.getHigh2();
LOG.trace("CRS Coordinates: X23 (" + x2 + "," + x3 + ") + Y23 (" + y2 + "," + y3 + ")");
/* For WGS84, the offset = (# pixels)/(CRS span) */
double oX = crs.getOffset1();
double oY = crs.getOffset2();
/* The actual conversion is below: */
if (axisName.equals("X")) {
px0 = Math.round((u2 - x2) / oX) + x0;
px1 = Math.round((u3 - u2) / oX) + px0;
LOG.debug("CRS Coordinates on axis X: U23 (" + u2 + "," + u3 + ")");
LOG.debug("Pixel Coordinates on axis X: U01 (" + px0 + "," + px1 + ") ");
}
if (axisName.equals("Y")) {
py0 = Math.round((y3 - v3) / oY) + y0;
py1 = Math.round((v3 - v2) / oY) + py0;
LOG.debug("CRS Coordinates on axis Y: V23 (" + v2 + "," + v3 + ")");
LOG.debug("Pixel Coordinates on axis Y: V01 (" + py0 + "," + py1 + ")");
}
}
long[] longCoord = {px0, px1, py0, py1};
return longCoord;
}
public String toRasQL() {
return crsName;
}
public String getName() {
return crsName;
}
}
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