[osg-users] Resolution of .earth vice .osg/.ive Formats?

Robert Osfield robert.osfield at gmail.com
Mon Jun 3 06:00:31 PDT 2019

Hi Steve and Chris,

On Mon, 3 Jun 2019 at 13:00, Chris Hanson <xenon at alphapixel.com> wrote:
> It sounds like osgdem's idea of 'levels' may not correspond to CDB's, and increasing the number os osgdem levels may be the right solution.
> I don't think osgdem ever generates "too many" levels -- the "levels" option simply limits how far it is allowed to go. So, if you really want ALL detail from your source data shown, you should probably just try giving it a crazy high levels limit (16?) and let it grind away producing tiles for as much detail as you've got.

I don't recall the max LOD I've used before, I think it was higher
than 16 though, but this was for whole earth dataset with inserts down
to sub metres res image data.  For these really big datasets you have
to use vpbmaster and use a distributed build multiple

The VPB automatically stops generating new levels once the
elevation/image data is a higher enough resolution, on the leaves of
the whole scene graph, properly represent the source DEMs/Imagery.  So
a level of 99 won't ever be hit, the VPB will automatically stop well
before this, the level parameter you give vpbmaster/osgdem is simply
the maximum number of levels you want to build.


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