Hello!
I'am stuck trying to render map in mercator projection.
Whatever i try geotools is not rendering in any other projection than
which you can see on image
http://ds.azcltd.com/quickStart/geotools_QuickStart.jpg (I don't know
what projection it is). As you can see this image does'not
look even a bit like mercator. (For demonstration another image
http://ds.azcltd.com/quickStart/google_mercator.jpg - google maps
screenshot - that is example of projection I want to have)
I spent really lots of time! I read lots of documentations, mailing
lists... I do not know what I am doing wrong! StreamingRenderer alwayl
produce same result! I tryed many variants of WKT - result is the same.
Please, help me to solve this problem
I use geotools 2.4.1.
I have attached my source's main file QuickStart.java.
whole test project is available at
http://ds.azcltd.com/quickStart/QuickStart.zip - approximately 36 kbytes
(it consists of 5 java files and 3 resource files. )
Please, help me!
ps: I know that my english is not so good... So, excuse me for that.
package com.azoft;
import com.vividsolutions.jts.geom.Envelope;
import org.geotools.filter.IllegalFilterException;
import org.geotools.gui.swing.*;
import org.geotools.map.DefaultMapContext;
import org.geotools.map.MapContext;
import org.geotools.referencing.CRS;
import org.geotools.referencing.FactoryFinder;
import org.geotools.renderer.GTRenderer;
import org.geotools.renderer.lite.StreamingRenderer;
import org.geotools.styling.*;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.crs.CRSFactory;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import javax.swing.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
public class QuickStart {
//GUI frame, pane and extras
static JFrame frame;
static JMapPane jmp;
static JToolBar jtb;
static JLabel text;
//Display elements
static MapContext context;
static GTRenderer renderer;
static com.vividsolutions.jts.geom.Envelope worldbounds;
/**
* Create a GUI map displayer.
* <p/>
* This is all Swing stuff for the JMapPane.
*/
public static void initGUI() {
frame = new JFrame("My Map Viewer");
// frame.setBounds(20,20,500,310);
frame.setBounds(20, 20, 1080, 600);
frame.setBackground(Color.cyan);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
Container content = frame.getContentPane();
content.setBackground(Color.magenta);
content.setLayout(new BorderLayout());
// content.setLayout(new GridLayout(1,2 ));
// jmpp = new JMapPane();
jmp = new JMapPane();
jmp.setBackground(Color.white);
// jmp.setSize(20,100);
//jmp.addZoomChangeListener(this);
/* TODO: Fix this TOOLBAR STUFF BELOW: */
content.setLayout(new BorderLayout());
jtb = new JToolBar();
Action zoomIn = new ZoomInAction(jmp);
Action zoomOut = new ZoomOutAction(jmp);
Action pan = new PanAction(jmp);
Action select = new SelectAction(jmp);
Action reset = new ResetAction(jmp);
jtb.add(zoomIn);
jtb.add(zoomOut);
jtb.add(pan);
jtb.addSeparator();
jtb.add(reset);
jtb.addSeparator();
jtb.add(select);
final JButton button = new JButton();
button.setText("CRS");
button.setToolTipText("Change map prjection");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String code = JOptionPane.showInputDialog(button, "Coordinate
Reference System:", "EPSG:4326");
try {
// CoordinateReferenceSystem crs = CRS.decode( code );
CoordinateReferenceSystem crs = CRS.parseWKT(code);
System.out.println("crs = '" + crs + "'");
jmp.getContext().setAreaOfInterest(jmp.getContext().getAreaOfInterest(), crs);
jmp.setReset(true);
jmp.repaint();
}
catch (FactoryException fe) {
JOptionPane.showMessageDialog(button, fe.getMessage(),
fe.getClass().toString(), JOptionPane.ERROR_MESSAGE);
return;
}
}
});
jtb.add(button);
content.add(jtb, BorderLayout.NORTH);
/* TOOLBAR STUFF ABOVE */
content.add(jmp, BorderLayout.CENTER);
// content.add(jmp);
content.doLayout();
frame.setVisible(true);
}
private static double FACTOR = (double) 580 / (double) 420;
private static double oneKilometer = ((90. / 10000.) / FACTOR);
private static double MIN_SCALE_FACTOR = 0.11622 / oneKilometer;
private static double MAX_SCALE_FACTOR = 0.11624 / oneKilometer;
private static final double googleMaxZoom = 65000;
private static final double[] zoomLevels = {
googleMaxZoom / 1048576, googleMaxZoom / 524288,
googleMaxZoom / 262144, googleMaxZoom / 131072, googleMaxZoom /
65536, googleMaxZoom / 32768,
googleMaxZoom / 16384, googleMaxZoom / 8192, googleMaxZoom / 4096,
googleMaxZoom / 2048,
googleMaxZoom / 1024, googleMaxZoom / 512, googleMaxZoom / 256,
googleMaxZoom / 128,
googleMaxZoom / 64, googleMaxZoom / 32, googleMaxZoom / 16,
googleMaxZoom / 8,
googleMaxZoom / 4, googleMaxZoom / 2, googleMaxZoom};
private static final List<MapLayer> mapLayers = new ArrayList<MapLayer>();
private static void loadMapLayers(String mapLayersXmlPath) throws
IOException, IllegalFilterException {
final String destinationCharset = "cp1251";
DocumentBuilderFactory domFactory =
DocumentBuilderFactory.newInstance();
domFactory.setValidating(false);
try {
double eps = 1e-10;
DocumentBuilder builder = domFactory.newDocumentBuilder();
Document doc = builder.parse("resources/MapLayers.xml");
// String rootDir = QuickStart.class.getResource("/").toString();
NodeList mapLayerTags = doc.getElementsByTagName("MapLayer");
for (int i = 0; i < mapLayerTags.getLength(); i++) {
Node mapLayerTag = mapLayerTags.item(i);
String path =
mapLayerTag.getAttributes().getNamedItem("path").getTextContent();
int maxScaleNum = (int)
Double.parseDouble(mapLayerTag.getAttributes().getNamedItem("maxScaleNum").getTextContent());
double priority =
Double.parseDouble(mapLayerTag.getAttributes().getNamedItem("priority").getTextContent());
String type =
mapLayerTag.getAttributes().getNamedItem("type").getTextContent();
String sorceCharset =
mapLayerTag.getAttributes().getNamedItem("sorceCharset").getTextContent();
SourceData source;
// if ("SourceShapefilesFromArcSde".equals(type)) {
// source = new SourceShapefilesFromArcSde(rootDir + path,
sorceCharset, destinationCharset);
// } else if ("SourceMPfiles".equals(type)) {
source = new SourceMPfiles(path, sorceCharset,
destinationCharset);
// } else if ("SourceShapefiles".equals(type)) {
// source = new SourceShapefiles(rootDir + path,
sorceCharset, destinationCharset);
// } else {
// throw new IllegalArgumentException("Unknown MapLayer
type");
// }
System.out.println("======Creating MapLayer from: '" +
source.getPath() + "'");
List<Layer> layers = new ArrayList<Layer>();
NodeList layerTags = mapLayerTag.getChildNodes();
for (int j = 0; j < layerTags.getLength(); j++) {
Node layerTag = layerTags.item(j);
if (!"Layer".equals(layerTag.getNodeName())) {
continue;
}
String file =
layerTag.getAttributes().getNamedItem("file").getTextContent();
String filter =
layerTag.getAttributes().getNamedItem("filter").getTextContent();
String pathToStyle =
layerTag.getAttributes().getNamedItem("pathToStyle").getTextContent();
try {
layers.add(new Layer(source, file, filter,
// createStyle(servletContext,
servletContext.getRealPath(pathToStyle)),
createStyle(pathToStyle),
pathToStyle));
} catch (Throwable e) {
System.out.println("Can not create Layer[" +
source.getPath() + ", " + file + ", " + filter + ", " + pathToStyle + "]");
}
}
// mapLayersManager.addLayer(new MapLayer(source.getPath(),
layers, zoomLevels[maxScaleNum] + eps, priority));
mapLayers.add(new MapLayer(source.getPath(), layers,
zoomLevels[maxScaleNum] + eps, priority));
System.out.println("======/MapLayer from: '" + source.getPath()
+ "' successfully created.");
}
} catch (ParserConfigurationException e) {
throw new IllegalArgumentException("'" + mapLayersXmlPath + "' is
invalid!", e);
} catch (SAXException e) {
throw new IllegalArgumentException("'" + mapLayersXmlPath + "' is
invalid!", e);
}
}
private static Style createStyle(String path) throws IOException {
SLDParser sldParser = new SLDParser(new
StyleBuilder().getStyleFactory());
File f = new File(path);
// log.info("Loading style from: '" + f.getPath() + "'");
FileReader is = new FileReader(f);
BufferedReader br = new BufferedReader(is);
String styleXml = "", line, link = "xlink:href=\"";
//setup links on images
while ((line = br.readLine()) != null) {
int ind = line.indexOf(link);
if (ind >= 0) {
String tmp = line.substring(ind + link.length());
int ind2 = tmp.indexOf("\"");
if (ind2 >= 0) {
tmp = tmp.substring(0, ind2);
// String realPath = servletContext.getResource("/" +
tmp).toString();
String realPath = "resources/" + tmp;
line = line.replace(tmp, realPath);
}
}
styleXml += line;
}
br.close();
is.close();
sldParser.setInput(new StringReader(styleXml));
Style style = sldParser.readXML()[0];
//setup MinScaleDenominator and MaxScaleDenominator
for (FeatureTypeStyle featureTypeStyle : style.getFeatureTypeStyles()) {
if (featureTypeStyle == null || featureTypeStyle.getRules() ==
null) {
continue;
}
for (Rule rule : featureTypeStyle.getRules()) {
if (rule == null) {
continue;
}
double min = rule.getMinScaleDenominator();
double max = rule.getMaxScaleDenominator();
int minI = (int) min, maxI = (int) max;
minI = zoomLevels.length <= minI ? zoomLevels.length - 1 : minI
< 0 ? 0 : minI;
maxI = zoomLevels.length <= maxI ? zoomLevels.length - 1 : maxI
< 0 ? 0 : maxI;
rule.setMinScaleDenominator(zoomLevels[minI] *
MIN_SCALE_FACTOR);
rule.setMaxScaleDenominator(zoomLevels[maxI] *
MAX_SCALE_FACTOR);
// rule.setMaxScaleDenominator(zoomLevels[zoomLevels.length-1] *
RenderConst.MAX_SCALE_FACTOR);
// rule.setMinScaleDenominator(0);
// rule.setMaxScaleDenominator(1e25);
}
}
return style;
}
/**
* Display features onto the screen.
* <p/>
* This is a very crude example, showing only how do display a map. The
* core class, JMapPane, also has a toolbar which is not shown here. See
* the demo/gui for more details.
*/
public static void loadGUI() throws Exception {
//Setup the context and renderer within the jmappane
context = new DefaultMapContext(); //WGS84 by default //TODO: make
mercator
//Trying to make Mercator
CRSFactory crsFactory = FactoryFinder.getCRSFactory(null);
String wkt = "PROJCS[\"Mercator_1SP\", "
+ "GEOGCS[\"WGS84\", "
+ "DATUM[\"WGS84\", "
+ "SPHEROID[\"WGS84\", 6378137.0, 298.257223563]], "
+ "PRIMEM[\"Greenwich\", 0.0], "
+ "UNIT[\"degree\",0.017453292519943295], "
+ "AXIS[\"Longitude\",EAST], "
+ "AXIS[\"Latitude\",NORTH]], "
+ "PROJECTION[\"Mercator_1SP\"], "
+ "PARAMETER[\"semi_major\", 6378137.0], "
+ "PARAMETER[\"semi_minor\", 6356752.314245179], "
+ "PARAMETER[\"central_meridian\", 0.0], "
+ "PARAMETER[\"scale_factor\", 1.0], "
+ "PARAMETER[\"false_easting\", 0.0], "
+ "PARAMETER[\"false_northing\", 0.0], "
+ "UNIT[\"metre\",1.0], "
+ "AXIS[\"x\",EAST], "
+ "AXIS[\"y\",NORTH]]";
CoordinateReferenceSystem prjCRS = null;
try {
prjCRS = crsFactory.createFromWKT(wkt);
System.out.println("prjCRS = '" + prjCRS + "'");
} catch (FactoryException fe) {
System.err.println("On prjCRS creation a FactoryException :" +
fe.getMessage());
}
Envelope e = new Envelope(-170.0, 170.0, -80.0, 80.0);
context.setAreaOfInterest(e, prjCRS);
renderer = new StreamingRenderer();
jmp.setRenderer(renderer);
jmp.setContext(context);
//Add the data directly to the context (which makes the MapLayers)
for (MapLayer mapLayer : mapLayers) {
mapLayer.applyLayer(context);
}
//Set boundary to all that's visible
jmp.setMapArea(context.getLayerBounds());
// jmp.setMapArea(e);
jmp.setHighlightLayer(context.getLayer(0));
// jmp.setSize(200,600);
frame.repaint();
frame.doLayout();
// Thread.sleep(5000);
// jmp.setSize(200,600);
// frame.repaint();
// frame.doLayout();
}
/**
* This is main() the only real function in this QuickStart tutorial.
* The class works sequentially through every step
*
* @param args
*/
public static void main(String[] args) throws Exception {
System.out.println("QuickStart: Tutorial Start...");
System.out.println("\tStart: Create FeatureSource from scratch.");
loadMapLayers("");
System.out.println("\t End: Created FeatureSource from scratch.");
System.out.println("\tStart: Initialize the GUI.");
initGUI();
System.out.println("\t End: Initialized the GUI.");
System.out.println("\tStart: Load the map.");
loadGUI();
System.out.println("\t End: Loaded the map.");
System.out.println("QuickStart: Tutorial End.");
}
}-------------------------------------------------------------------------
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