<div><div class="gmail_quote">On Tue, Feb 16, 2010 at 4:20 AM, Olli <span dir="ltr"><<a href="mailto:gammelnerd@gmail.com">gammelnerd@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi,<br>
<br>
I have a set of DEM files and should implement a multi-resolution terrain rendering solution. And ultimately place some 3D data objects to terrain view.<br>
<br>
Because my data visualization already utilizes VTK, I'm looking for a solution that would use VTK also for terrain rendering. I took a look to vtkGeoView and vtkGeoTerrain classes, which already implement a multiresolution scheme. I just couldn't figure out how to get from DEM files to correct data representation.<br>
<br>
- How to process DEM files to get proper vtkGeoSource geometry tiles?<br>
- Do I manage with elevation data and color map only, or do I need some texture file to cover earth surface?<br>
- It is possible to use vtkGeoView and vtkGeoTerrain to render terrain for smaller areas than the whole globe?<br>
- And I'd like to render in planar projection, not spheric, as GeoView currently. Possible?<br>
<br>
Some question to start with. I'm a bit confused...<br>
<br>
Thanks,<br>
<br>
Olli<br><br></blockquote><div><br></div><div>I also had no idea how to use these classes. I made some shell examples - maybe someone can get them working for Olli?</div><div><br></div><a href="http://www.vtk.org/Wiki/VTK/Examples/Geovis/GeoView">http://www.vtk.org/Wiki/VTK/Examples/Geovis/GeoView</a><div>
<a href="http://www.vtk.org/Wiki/VTK/Examples/Geovis/GeoGlobeSource">http://www.vtk.org/Wiki/VTK/Examples/Geovis/GeoGlobeSource</a></div><div><br clear="all">Thanks,<br><br></div><div>David</div></div></div>