Java Gis 拓扑图（Google 地图）

public class GoogleDemo extends GisDemoPane {

public GoogleDemo() {
init();

}

void init() {

Node node1 = createNode("Manchester", 53.488046, -2.241211);

Node node2 = createNode("Paris", 48.893615, 2.329102);

Node node3 = createNode("Berlin", 52.522906, 13.403320);

Node node4 = createNode("Praha", 50.092393, 14.414063);

box.addElement(node1);
box.addElement(node2);
box.addElement(node3);
box.addElement(node4);

box.addElement(createLink(node1, node2));
box.addElement(createLink(node2, node3));
box.addElement(createLink(node3, node4));

this.network.setTileSource(new GoogleTileSource());
}

private static Node createNode(String displayName, double lat, double lon) {
Node node2 = new Node();
node2.setDisplayName(displayName);
node2.putCustomDraw(true);
node2.putCustomDrawFillColor(BladeUtil.getRandomColor());
node2.putCustomDrawOutline(false);
node2.setGeoPosition(new Point3D(lat, lon));
return node2;
}

private static Link createLink(Node from, Node to){
Link link = new Link(from, to);
link.putLink3D(true);
link.putLinkColor(BladeUtil.getRandomColor());
link.putLinkFlowingColor(BladeUtil.getRandomColor());
link.putLinkFlowing(true);
link.putLinkWidth(8);
link.putLinkFlowingWidth(4);
return link;
}

public static void main(String argv[]) {
GisDemoUtil.show(new GoogleDemo());
}

}