使用来自 JXMapViewer 源(链接到 github)的基本示例,我修改了源以从 wms 服务器加载图块。但是,尽管测试显示 URL 正确形成,但 Tilefactory 并未正确加载图块。
唯一修改的部分是这样的:
TileFactoryInfo info = new WMSTileFactoryInfo(0, 10, 11, "https://mesonet.agron.iastate.edu/cgi-bin/wms/us/mrms.cgi", "mrms_p48h");
DefaultTileFactory tileFactory = new DefaultTileFactory(info);
mapViewer.setTileFactory(tileFactory);
和测试产生可以在网络浏览器中加载的正确格式的 url:
//Test: Created URLs work. 10 = max zoom
System.out.println(info.getTileUrl(0, 0, 10));
System.out.println(info.getTileUrl(0, 1, 9));
System.out.println(info.getTileUrl(1, 1, 9));
但是,当我尝试在简单的 JFrame 中显示它时(代码与示例相同,除了与 OSM 一起使用的不同中心位置 Des Moins),瓷砖将不会加载。
这是我的测试的完整代码:
import javax.swing.JFrame;
import org.jxmapviewer.viewer.DefaultTileFactory;
import org.jxmapviewer.viewer.GeoPosition;
import org.jxmapviewer.JXMapViewer;
import org.jxmapviewer.WMSTileFactoryInfo;
import org.jxmapviewer.viewer.TileFactoryInfo;
public class WMSTest {
public static void main(String[] args) {
JXMapViewer mapViewer = new JXMapViewer();
// Create a TileFactoryInfo for WMS
//WMSTileFactoryInfo int minZoom, int maxZoom, int totalMapZoom, java.lang.String baseURL, java.lang.String layers)
TileFactoryInfo info = new WMSTileFactoryInfo(0, 10, 11, "https://mesonet.agron.iastate.edu/cgi-bin/wms/us/mrms.cgi", "mrms_p48h");
//Test: Do created URLs work? 10 = max zoom, 9 = 1 level lower -> OK.
System.out.println(info.getTileUrl(0, 0, 10));
System.out.println(info.getTileUrl(0, 1, 9));
System.out.println(info.getTileUrl(1, 1, 9));
DefaultTileFactory tileFactory = new DefaultTileFactory(info);
mapViewer.setTileFactory(tileFactory);
// Create a TileFactoryInfo for OpenStreetMap
//TileFactoryInfo info2 = new OSMTileFactoryInfo();
//DefaultTileFactory tileFactory2 = new DefaultTileFactory(info2);
//mapViewer.setTileFactory(tileFactory2);
// Use 8 threads in parallel to load the tiles
tileFactory.setThreadPoolSize(8);
// Set the focus
GeoPosition desMoines = new GeoPosition(41.590833, -93.620833);
mapViewer.setZoom(9);
mapViewer.setAddressLocation(desMoines);
// Display the viewer in a JFrame
JFrame frame = new JFrame("JXMapviewer2 Example 1");
frame.getContentPane().add(mapViewer);
frame.setSize(800, 600);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}