[osg-users] vpb: flipped/mirrored elevation terrain

[Mattias Helsing]

hi all,
this got lost so sorry if i'm double posting.

using osgdem with a jpg texture and png elevation generates a mirrored
elevation terrain (for me :)
in simplest form I invoke odgdem like:

  osgdem -l 8 -o test.osg --xx 4096 --yy 4096 --zt 100 -t map_0_0_0_i.jpg
--xx 4096 --yy 4096 -d map_0_0_0_h.png --no-terrain-simplification

the above will generate i nice,pageloded terrain with elevation data flipped
"vertical", i.e elevation data for florida will be applied around NY for a
USA extent.

Translating the png to, for example, tiff (using gdal_translate will produce
the same results), so I guess this is a "feature" in vpb(not the plugin) ,
which is probably what it is and i'm the only one who doesn't get it :).

Any hint at all appreciated or i'll just go and write image flipping
routines
oh, i'm using the head of both osg and vpb, Mike's 3rdParty and GDAL 1.2.6.0

/Mattias
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