java - GeoTools:在 map 上绘制多边形

Question

我是 Java 的 GeoTools 库的新手，我只是想在 map 上绘制一个多边形。我正在为点使用 GPS 坐标，绘制得很好，但我只是想不出如何在它们之间绘制 LineString 来挽救我的生命。

我已经检查了 geotools.org 上的所有教程以及 this posting但无济于事。有必要这么复杂吗？有人可以发布绘制 LineString 所需的代码片段吗？这是我最后尝试过的:

SimpleFeatureType lineType = DataUtilities.createType("LINE", "geom:LineString,name:String");
SimpleFeatureBuilder featureBuilderLines = new SimpleFeatureBuilder(lineType);
SimpleFeatureCollection collectionLines = FeatureCollections.newCollection();

LineString line = builder.createLineString(listOfPoints);
featureBuilderLines.add(line);
SimpleFeature featureLine = featureBuilderLines.buildFeature(null);
((DefaultFeatureCollection)collectionLines).add(featureLine);     
Style lineStyle = SLD.createLineStyle(Color.RED, 2.0f);
map.addLayer(new FeatureLayer(collectionLines, lineStyle));

谢谢，提前致以最诚挚的问候

Answer 1

你似乎在混合几何类型，尝试类似的东西:

import org.geotools.geometry.jts.JTSFactoryFinder;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.LineString;

public class TestLineBuilder {
    public static void  main(String[] args) {

    com.vividsolutions.jts.geom.GeometryFactory gFac = JTSFactoryFinder.getGeometryFactory();
    Coordinate[] coordinates = new Coordinate[2];
    coordinates[0] = new Coordinate(1,3);
    coordinates[1] = new Coordinate(3,8);
    LineString line =gFac.createLineString(coordinates );
    System.out.println(line);
    }
}

这为我提供了正确的答案。