[osg-users] TerrainTile and heightfield splitting

[Sebastian Messerschmidt]

Hi Leandro,

You can try VPB (Virtual Planet Builder for this). It should take care 
of splitting and merging of datasets in the  result-tiles if they are 
correctly  geo-referenced.
Cheers
Sebastian


> Hi,
>
> I have a region of terrain represented with 5 datasets. One dataset for elevation (a geotiff file) and four datasets of satellite imagery (jp2 files). Each satellite imagery covers a different quarter of the region, covering the full region all together (like a quad-tree structure with elevation al level of detail L and imagery at level of detail L+1).
>
> This is all data I have and I want to visualize this data using osgTerrain library.
>
> I can't use this data as it is in a osgTerrain::TerrainTile because I must cover the same terrain region in color and elevation layers associated to the TerrainTile. First question: Is that right or am I missing something?
>
> If i don't missing something, in order to use osgTerrain::TerrainTile I need to join the four imagery datasets in one dataset or split the elevation dataset in four datasets.
>
> I decided to split the elevation data. So, I made four gdal_translate calls to generate the new four elevation datasets, I created four TerrainTile nodes and associated a pair of elevation-imagery datasets for each TerrainTile (as osg::Heighfield's and osg::Image's) and it's working ok.
>
> Second question: is there a way of splitting directly the osg::HeightField instead of splitting the geotiff file?
>
> Thank you!
>
> Cheers,
> Leandro
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=66846#66846
>
>
>
>
>
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