osgearth中tif

warding

问的属于入门的问题~请不吝指教
请教下编辑mymap.earth文件

1. 
   
2. <map name="MyMap" type="geocentric" version="2">
   
3.     <image name="bluemarble" driver="gdal">
   
4.         <url>d:/world.tif</url>
   
5.     </image>
   
6. </map>
   

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直接在程序中读取(或者用osgviewer运行)怎么只有空白的球~~

按照自带的例子运行

1. // Start by creating the map:
   
2. Map* map = new Map();
   
3. 
   
4. // Start with a basemap imagery layer; we'll be using the GDAL driver
   
5. // to load a local GeoTIFF file:
   
6. GDALOptions basemapOpt;
   
7. //basemapOpt.url() = "d:/earthdata/data/world.tif";
   
8. basemapOpt.url() = "d:/world.tif";
   
9. //map->addImageLayer( new ImageLayer( ImageLayerOptions("basemap", basemapOpt) ) );
   
10. map->addImageLayer( new ImageLayer( "basemap", basemapOpt) );
    
11. 
    
12. // Next we add a feature layer. First configure a feature driver to
    
13. // load the vectors from a shapefile:
    
14. OGRFeatureOptions featureOpt;
    
15. featureOpt.url() = "d:/earthdata/data/world.shp";
    
16. //featureOpt.da
    
17. 
    
18. // Define a style for the feature data. Since we are going to render the
    
19. // vectors as lines, configure the line symbolizer:
    
20. Style* style = new Style;
    
21. 
    
22. LineSymbol* ls = new LineSymbol;
    
23. ls->stroke()->color() = osg::Vec4f( 1,1,0,1 );
    
24. ls->stroke()->width() = 1.5f;
    
25. style->addSymbol(ls);
    
26. 
    
27. // Now we'll choose the AGG-Lite driver to render the features. By the way, the
    
28. // feature data is actually polygons, so we override that to treat it as lines.
    
29. // We apply the feature driver and set the style as well.
    
30. AGGLiteOptions worldOpt;
    
31. worldOpt.featureOptions() = featureOpt;
    
32. worldOpt.geometryTypeOverride() = Geometry::TYPE_LINESTRING;
    
33. worldOpt.styles()->addStyle( style );
    
34. map->addImageLayer( new ImageLayer( ImageLayerOptions("world", worldOpt) ) );
    
35. 
    
36. 
    
37. // That's it, the map is ready; now create a MapNode to render the Map:
    
38. MapNode* mapNode = new MapNode( map );
    
39. 
    
40. viewer.setSceneData( mapNode );

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可以显示world.tif的贴图,但不能显示shp文件,请问是什么原因~
另外
如果只显示tif贴图
如下这样为什么不行啊~~用的是osgearth2.0~

1. Map* map = new Map();
   
2. 
   
3. // Start with a basemap imagery layer; we'll be using the GDAL driver
   
4. // to load a local GeoTIFF file:
   
5. GDALOptions basemapOpt;
   
6. //basemapOpt.url() = "d:/earthdata/data/world.tif";
   
7. basemapOpt.url() = "d:/world.tif";
   
8. //map->addImageLayer( new ImageLayer( ImageLayerOptions("basemap", basemapOpt) ) );
   
9. map->addImageLayer( new ImageLayer( "basemap", basemapOpt) );
   
10. MapNode* mapNode = new MapNode( map );
    
11. 
    
12. viewer.setSceneData( mapNode );
    

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pkuwwt

我也有这个问题。但我仿照clouds.earth的写法，前面加了一些选项，就可以了。clouds.earth是在原地球上面建了一个稍大一点的椭球体。

具体为什么是这样，还没有仔细研究。

pkuwwt

我也有这个问题。但我仿照clouds.earth的写法，前面加了一些选项，就可以了。clouds.earth是在原地球上面建了一个稍大一点的椭球体。

具体为什么是这样，还没有仔细研究。