Custom layers and elevation exception

[Sphynx]

Hi all,

i'm testing to import some maps as TiledImageLayer. Everything is okay but I have an exception with a map :

1 mars 2012 12:06:35 gov.nasa.worldwind.terrain.BasicElevatio nModel getExtremeElevations
ATTENTION: Exception while determining extreme elevations for (56.98828125°, -20.00390625°), (92.98828125°, 15.99609375°)

The conf of my layer is :

<FormatSuffix>.dds</FormatSuffix>
<NumLevels count="12" numEmpty="11" />
<Sector>
<SouthWest>
<LatLon latitude="56.98828125" longitude="-20.00390625" units="degrees" />
</SouthWest>
<NorthEast>
<LatLon latitude="57.005859375" longitude="-19.96875" units="degrees" />
</NorthEast>
</Sector>
<TileOrigin>
<LatLon latitude="56.98828125" longitude="-20.00390625" units="degrees" />
</TileOrigin>
<TileSize>
<Dimension height="512" width="512" />
</TileSize>
<LevelZeroTileDelta>
<LatLon latitude="36.0" longitude="36.0" units="degrees" />
</LevelZeroTileDelta>
<Service serviceName="WWTileService" />
<ImageFormat>image/dds</ImageFormat>
<UseMipMaps>true</UseMipMaps>
<UseTransparentTextures>true</UseTransparentTextures>
<DetailHint>0.6020599913279625</DetailHint>

It seems the system try to load elevations for a tile at the level 0 with a size based on the level zero tile delta (36°). But the first level of my layer is the 12 and even if i remove the custom detail hint i still get the exception.
I tried to add a max ActiveAltitudes in my conf layer and there's no exception until the max altitude is reach.

The elevation model i use is EarthElevationModel.bil16 ant its conf layer :

<DisplayName>USA 10m, World 30m, Ocean 900m</DisplayName>
<MissingData signal="-9999.0" />
<DataDetailHint>0.2</DataDetailHint>
<DatasetName>mergedAsterElevations</DatasetName>
<DataCacheName>Earth/EarthElevationModel.bil16</DataCacheName>
<Service serviceName="OGC:WMS" version="1.3">
<LayerNames>mergedAsterElevations</LayerNames>
<GetMapURL>http://data.worldwind.arc.nasa.gov/elev</GetMapURL>
<GetCapabilitiesURL>http://data.worldwind.arc.nasa.gov/elev</GetCapabilitiesURL>
</Service>
<LastUpdate>1261011661000</LastUpdate>
<FormatSuffix>.bil</FormatSuffix>
<NumLevels count="12" numEmpty="0" />
<Sector>
<SouthWest>
<LatLon latitude="-90.0" longitude="-180.0" units="degrees" />
</SouthWest>
<NorthEast>
<LatLon latitude="90.0" longitude="180.0" units="degrees" />
</NorthEast>
</Sector>
<SectorResolutionLimit maxLevelNum="11">
<Sector>
<SouthWest>
<LatLon latitude="24.0" longitude="-125.0" units="degrees" />
</SouthWest>
<NorthEast>
<LatLon latitude="50.0" longitude="-66.8" units="degrees" />
</NorthEast>
</Sector>
</SectorResolutionLimit>
<SectorResolutionLimit maxLevelNum="11">
<Sector>
<SouthWest>
<LatLon latitude="18.5" longitude="-160.5" units="degrees" />
</SouthWest>
<NorthEast>
<LatLon latitude="22.5" longitude="-154.5" units="degrees" />
</NorthEast>
</Sector>
</SectorResolutionLimit>
<SectorResolutionLimit maxLevelNum="11">
<Sector>
<SouthWest>
<LatLon latitude="17.8" longitude="-67.4" units="degrees" />
</SouthWest>
<NorthEast>
<LatLon latitude="18.7" longitude="-64.5" units="degrees" />
</NorthEast>
</Sector>
</SectorResolutionLimit>
<SectorResolutionLimit maxLevelNum="11">
<Sector>
<SouthWest>
<LatLon latitude="48.0" longitude="-179.9" units="degrees" />
</SouthWest>
<NorthEast>
<LatLon latitude="66.0" longitude="-128.0" units="degrees" />
</NorthEast>
</Sector>
</SectorResolutionLimit>
<SectorResolutionLimit maxLevelNum="9">
<Sector>
<SouthWest>
<LatLon latitude="-54.0" longitude="-180.0" units="degrees" />
</SouthWest>
<NorthEast>
<LatLon latitude="60.0" longitude="180.0" units="degrees" />
</NorthEast>
</Sector>
</SectorResolutionLimit>
<SectorResolutionLimit maxLevelNum="4">
<Sector>
<SouthWest>
<LatLon latitude="-90.0" longitude="-180.0" units="degrees" />
</SouthWest>
<NorthEast>
<LatLon latitude="90.0" longitude="180.0" units="degrees" />
</NorthEast>
</Sector>
</SectorResolutionLimit>
<TileOrigin>
<LatLon latitude="-90.0" longitude="-180.0" units="degrees" />
</TileOrigin>
<TileSize>
<Dimension height="150" width="150" />
</TileSize>
<LevelZeroTileDelta>
<LatLon latitude="20.0" longitude="20.0" units="degrees" />
</LevelZeroTileDelta>
<RetrievePropertiesFromService>true</RetrievePropertiesFromService>
<ImageFormat>application/bil16</ImageFormat>
<DataType byteOrder="LittleEndian" type="Int16" />
<ExtremeElevations max="8850.0" min="-11000.0">
<FileName>config/SRTM30Plus_ExtremeElevations_5.bil</FileName>
</ExtremeElevations>

Thanks for your help.

Florent.

[Sphynx]

Well i found something in TiledImageLayer class : the createTopLevelTiles() method is called to create the topLevels field :

Sector sector = this.levels.getSector();

Level level = levels.getFirstLevel();
Angle dLat = level.getTileDelta().getLatitude();
Angle dLon = level.getTileDelta().getLongitude();
Angle latOrigin = this.levels.getTileOrigin().getLatitude( );
Angle lonOrigin = this.levels.getTileOrigin().getLongitude ();



The latOrigin and lonOrigin angles are okay but not dLat and dLon because the value is 36° (LevelZeroTileDelta) although my tile delta is 36 / Math.pow(2.0d, numEmpyLevels).

I'll try to set in my conf file <NumLevels count="1" numEmpty="0" /> and compute the correct LevelZeroTileDelta.


Edit : it works but I have to compute the ActiveAltitudes max not to show layers at all levels.