Shayne, Whether you get a palpable performance hit depends on a lot of factors. One of osgEarth's features is the ability to pull data from web mapping services (similar to Googe Maps). That type of data is pre-tiled into raster pyramids - which is what VPB does too. So if your source data is similarly prepared, you can achieve loading speeds comparable to a pre-generated terrain model. osgEarth includes tools for that.
osgEarth's caching stores multi-resolution pyramids of source data, so if you have to ingest "expensive" data it will only be a performance hit the first time through. If you're loading flat files - GeoTIFFs, DEMs, etc - then there is some processing overhead in pulling in the data, especially if it needs reprojecting. But otherwise, you might be surprised at how fast is actually is. It is worth mentioning that osgEarth is not just a terrain engine, but a whole toolkit. It includes an API for coordinate conversion, support for vector features, utilities for clamping, a programmable manipulator, plugins for lots of web- and file-based data sources, and shader composition support. Glenn Waldron : Pelican Mapping On Thu, Dec 23, 2010 at 2:59 PM, Shayne Tueller <[email protected]>wrote: > All, > > Up to this point, we've used VPB for building our databases that our OSG > app uses. However, I've contemplated taking a look at osgEarth for future > consideration. > > My question is, is what advantages are there for using osgEarth vs. VPB? > > I understand that source content (DTED, GeoTiff, etc.) is loaded "on the > fly" in osgEarth but doesn't that hurt performance when compared to a > statically built database done with VPB? > > Thanks for any input in advance... > -Shayne > > ... > > > Thank you! > > Cheers, > Shayne > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=35137#35137 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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