gwaldron/osgearth — pull request #451 by aroth-fastprotect (2014-01-20 10:44:37+00:00)
Title: Topic elevation query maxlevel

The first commit fixes the trouble when an elevation layer has the maxLevel property configured but there are not used when no data extents are available.
The second one adds one big data extent for the VPB globe using the primary and secondary split levels or the new property maxDataLevelOverride.