osgearth加载离线瓦片地图
时间: 2023-08-11 07:03:29 浏览: 152
你可以使用OSGEarth来加载离线瓦片地图。首先,确保你已经准备好了瓦片地图数据。然后,按照以下步骤进行操作:
1. 创建一个OSG Viewer对象:
```cpp
osgViewer::Viewer viewer;
```
2. 创建一个OSGEarth地图对象:
```cpp
osgEarth::Map* map = new osgEarth::Map();
```
3. 创建一个OSGEarth的瓦片图层对象:
```cpp
osgEarth::TileSourceOptions tileSourceOptions;
tileSourceOptions.url() = "file:///path/to/your/tiles/{z}/{x}/{y}.png"; // 替换为你的瓦片地图路径
osgEarth::TileSource* tileSource = osgEarth::TileSourceFactory::create(tileSourceOptions);
osgEarth::ImageLayer* imageLayer = new osgEarth::ImageLayer("Offline Tiles", tileSource);
```
4. 将瓦片图层添加到地图对象中:
```cpp
map->addImageLayer(imageLayer);
```
5. 创建OSGEarth视图图层并将地图对象添加到其中:
```cpp
osgEarth::Viewpoint viewpoint; // 可选的视角设置
osgEarth::ViewpointOptions viewpointOptions;
viewpointOptions.name() = "Start";
viewpointOptions.focalPoint() = osgEarth::GeoPoint(map->getSRS(), longitude, latitude, altitude); // 设置地图中心点的经纬度和海拔
viewpoint = osgEarth::Viewpoint(viewpointOptions);
osgEarth::ViewpointLayer* viewpointLayer = new osgEarth::ViewpointLayer();
viewpointLayer->setName("Viewpoints");
viewpointLayer->addViewpoint(viewpoint);
osgEarth::MapNode* mapNode = new osgEarth::MapNode(map);
mapNode->addChild(viewpointLayer);
osg::Group* root = new osg::Group();
root->addChild(mapNode);
viewer.setSceneData(root);
```
6. 运行OSG Viewer循环:
```cpp
viewer.run();
```
通过按照上述步骤操作,你就可以加载并显示离线瓦片地图了。请注意,你需要将代码中的瓦片地图路径替换为你自己的路径,并确保瓦片地图数据的格式和路径设置正确。