[转]worldwind在线加载google地图,或者基于墨卡托投影的切片地图
2021-03-18 14:25
标签:str height earth out googl generated ring list lse [转]worldwind在线加载google地图,或者基于墨卡托投影的切片地图 标签:str height earth out googl generated ring list lse 原文地址:https://www.cnblogs.com/rainbow70626/p/12355296.htmlpackage gis1;
import java.net.MalformedURLException;
import java.net.URL;
import gov.nasa.worldwind.avlist.AVKey;
import gov.nasa.worldwind.avlist.AVList;
import gov.nasa.worldwind.avlist.AVListImpl;
import gov.nasa.worldwind.geom.Angle;
import gov.nasa.worldwind.geom.LatLon;
import gov.nasa.worldwind.layers.mercator.BasicMercatorTiledImageLayer;
import gov.nasa.worldwind.layers.mercator.MercatorSector;
import gov.nasa.worldwind.util.LevelSet;
import gov.nasa.worldwind.util.Tile;
import gov.nasa.worldwind.util.TileUrlBuilder;
public class GoogleLayer extends BasicMercatorTiledImageLayer{
public GoogleLayer() {
super(makeLevels());
// TODO Auto-generated constructor stub
}
private static LevelSet makeLevels() {
// TODO Auto-generated method stub
AVList params = new AVListImpl();
params.setValue(AVKey.TILE_WIDTH, 256);
params.setValue(AVKey.TILE_HEIGHT, 256);
params.setValue(AVKey.DATA_CACHE_NAME, "Earth/GoogleMap");
params.setValue(AVKey.DATASET_NAME, "*");
params.setValue(AVKey.FORMAT_SUFFIX, ".jpg");
params.setValue(AVKey.NUM_LEVELS, 16);
params.setValue(AVKey.NUM_EMPTY_LEVELS, 0);
params.setValue(AVKey.LEVEL_ZERO_TILE_DELTA, new LatLon(Angle
.fromDegrees(22.5d), Angle.fromDegrees(45d)));
params.setValue(AVKey.SECTOR, new MercatorSector(-1.0, 1.0,
Angle.NEG180, Angle.POS180));
params.setValue(AVKey.TILE_URL_BUILDER, new URLBuilder());
return new LevelSet(params);
}
private static class URLBuilder implements TileUrlBuilder
{
public URL getURL(Tile tile, String imageFormat)
throws MalformedURLException
{
String url=String.format(
"http://www.google.cn/maps/vt?lyrs=s@183&gl=cn&x=%s&y=%s&z=%s",
tile.getColumn(),
(1 tile.getRow(),
(tile.getLevelNumber() + 3)
);
System.out.println(url);
return new URL(url);
}
}
}
文章标题:[转]worldwind在线加载google地图,或者基于墨卡托投影的切片地图
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