/* (c) 2014 Open Source Geospatial Foundation - all rights reserved
* (c) 2001 - 2013 OpenPlans
* This code is licensed under the GPL 2.0 license, available at the root
* application directory.
*/
package org.geoserver.web.demo;
import java.util.Collection;
import java.util.Locale;
import org.apache.wicket.PageParameters;
import org.apache.wicket.behavior.HeaderContributor;
import org.apache.wicket.markup.html.IHeaderContributor;
import org.apache.wicket.markup.html.IHeaderResponse;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.image.Image;
import org.geoserver.web.GeoServerBasePage;
import org.geoserver.web.crs.DynamicCrsMapResource;
import org.geoserver.web.wicket.ParamResourceModel;
import org.geoserver.web.wicket.SimpleBookmarkableLink;
import org.geotools.referencing.CRS;
import org.opengis.metadata.extent.Extent;
import org.opengis.metadata.extent.GeographicBoundingBox;
import org.opengis.metadata.extent.GeographicExtent;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.operation.MathTransform;
import org.opengis.util.InternationalString;
public class SRSDescriptionPage extends GeoServerBasePage implements IHeaderContributor {
private String jsSrs;
private String jsBbox;
private double jsMaxResolution;
/**
* Adds the call to the {@code initMap()} js function at the onload event of the body tag
*
* @see org.apache.wicket.markup.html.IHeaderContributor#renderHead(org.apache.wicket.markup.html.IHeaderResponse)
*/
public void renderHead(IHeaderResponse headerResponse) {
String onLoadJsCall = "initMap('" + jsSrs + "', " + jsBbox + ", " + jsMaxResolution + ")";
headerResponse.renderOnLoadJavascript(onLoadJsCall);
}
public SRSDescriptionPage(PageParameters params) {
// this two contributions should be relative to the root of the webbapp's context path
add(HeaderContributor.forCss("openlayers/theme/default/style.css"));
add(HeaderContributor.forJavaScript("openlayers/OpenLayers.js"));
final Locale locale = getLocale();
final String code = params.getString("code");
add(new Label("code", code));
String name = "";
try {
name = CRS.getAuthorityFactory(true).getDescriptionText(code).toString(getLocale());
} catch (Exception e) {
//
}
String wkt = "";
add(new Label("crsName", name));
CoordinateReferenceSystem crs = null;
try {
crs = CRS.decode(code);
} catch (Exception e) {
wkt = "Error decoding CRS: " + e.getMessage();
}
InternationalString scope = null;
InternationalString remarks = null;
StringBuilder aovCoords = new StringBuilder();
String areaOfValidity = "";
this.jsBbox = "null";
this.jsSrs = code;
CoordinateReferenceSystem mapCrs = crs;
if (crs != null) {
// CoordinateSystem coordinateSystem = crs.getCoordinateSystem();
// coordinateSystem.getName();
// coordinateSystem.getRemarks();
// coordinateSystem.getDimension();
//
// if(crs instanceof SingleCRS){
// Datum datum = ((SingleCRS)crs).getDatum();
// datum.getName();
// datum.getAlias();
// datum.getAnchorPoint();
// datum.getRemarks();
// datum.getScope();
// }
scope = crs.getScope();
remarks = crs.getRemarks();
wkt = crs.toString();
Extent domainOfValidity = crs.getDomainOfValidity();
if (domainOfValidity != null) {
areaOfValidity = domainOfValidity.getDescription() == null ? "" : domainOfValidity
.getDescription().toString(locale);
Collection<? extends GeographicExtent> geographicElements = domainOfValidity
.getGeographicElements();
for (GeographicExtent ex : geographicElements) {
aovCoords.append(" ").append(ex);
}
// Envelope envelope = CRS.getEnvelope(crs);
// jsBbox = "[" + envelope.getMinimum(0) + "," + envelope.getMinimum(1) + ","
// + envelope.getMaximum(0) + "," + envelope.getMaximum(1) + "]";
//
// jsMaxResolution = getMaxResolution(envelope);
// GeographicBoundingBox box = CRS.getGeographicBoundingBox(crs);
// jsBbox = "[" + box.getWestBoundLongitude() + "," + box.getSouthBoundLatitude()
// + "," + box.getEastBoundLongitude() + "," + box.getNorthBoundLatitude()
// + "]";
GeographicBoundingBox box = CRS.getGeographicBoundingBox(crs);
double westBoundLongitude = box.getWestBoundLongitude();
double eastBoundLongitude = box.getEastBoundLongitude();
double southBoundLatitude = box.getSouthBoundLatitude();
double northBoundLatitude = box.getNorthBoundLatitude();
double[] dst1;
double[] dst2;
double x1;
double y1;
double x2;
double y2;
try {
MathTransform tr = CRS.findMathTransform(CRS.decode("EPSG:4326"), crs, true);
dst1 = new double[tr.getTargetDimensions()];
dst2 = new double[tr.getTargetDimensions()];
double[] src1 = new double[tr.getSourceDimensions()];
src1[0] = westBoundLongitude;
src1[1] = southBoundLatitude;
double[] src2 = new double[tr.getSourceDimensions()];
src2[0] = eastBoundLongitude;
src2[1] = northBoundLatitude;
tr.transform(src1, 0, dst1, 0, 1);
tr.transform(src2, 0, dst2, 0, 1);
x1 = Math.min(dst1[0], dst2[0]);
y1 = Math.min(dst1[1], dst2[1]);
x2 = Math.max(dst1[0], dst2[0]);
y2 = Math.max(dst1[1], dst2[1]);
} catch (Exception e1) {
x1 = westBoundLongitude;
y1 = southBoundLatitude;
x2 = eastBoundLongitude;
y2 = northBoundLatitude;
this.jsSrs = "EPSG:4326";
try {
mapCrs = CRS.decode("EPSG:4326");
} catch (Exception e) {
throw new RuntimeException(e);
}
}
String bbox = "[" + x1 + "," + y1 + "," + x2 + "," + y2 + "]";
this.jsBbox = bbox;
double width = x2 - x1;
double height = y2 - y1;
double maxres = getMaxResolution(width, height);
this.jsMaxResolution = maxres;
}
}
add(new Label("crsScope", scope == null ? "-" : scope.toString(locale)));
add(new Label("crsRemarks", remarks == null ? "-" : remarks.toString(locale)));
add(new Label("wkt", wkt));
add(new Label("aovCoords", aovCoords.toString()));
add(new Label("aovDescription", areaOfValidity));
Image aovMap = new Image("aovMap", new DynamicCrsMapResource(mapCrs));
add(aovMap);
// link with the reprojection console
add(new SimpleBookmarkableLink("reprojectFrom", ReprojectPage.class, new ParamResourceModel("reprojectFrom", this, code), "fromSRS", code));
add(new SimpleBookmarkableLink("reprojectTo", ReprojectPage.class, new ParamResourceModel("reprojectTo", this, code), "toSRS", code));
}
private double getMaxResolution(final double w, final double h) {
return 4 * (((w > h) ? w : h) / 256);
}
}