Two example uses:
osgdem.exe --PagedLOD --compressed --mip-mapping-hardware --cs "+proj=UTM +datum=WGS84 +zone=43N" -t AVI\terrain\Oslo\Imagery\Oslo_Imagery_HiRes.tif -d AVI\terrain\Oslo\Elevation\Oslo_Elevation_HiRes2.tif -o AVI\terrain\Oslo\IVE4\output.ive -a AVI\terrain\Oslo\IVE3\Oslo_HiRes.osga
From the OSG SF page:
osgdem --xx 10 --yy 10 -t ../ps_texture.tif \
--xx 10 --yy 10 -d ../ps_height.tif \
-l 8 \
-v 0.1 \
-o pegout.ive
Usage: osgdem [options] filename ...
Options:
--BuildOverlays [True/False] Switch on/off the building of overlay
within the source imagery. Overlays
can help reduce texture aliasing
artifacts.
--GenerateTiles [True/False] Switch on/off the generation of the
output database tiles.
--HEIGHT_FIELD Create a height field database
--LOD Create a LOD'd database
--POLYGONAL Create a height field database
--PagedLOD Create a PagedLOD'd database
--RGB-16 Use 16bit RGB destination imagery
--RGB-24 Use 24bit RGB destination imagery
--RGBA Use 32bit RGBA destination imagery
--RGBA-16 Use 16bit RGBA destination imagery
--RGBA-compressed Use OpenGL compression on RGBA
destination imagery
--ReprojectSources [True/False] Switch on/off the reprojection of any
source imagery that aren't in the
correct projection for the database
build.
--TERRAIN Create a osgTerrain::Terrain database
--abort-run-on-error Hint to vpbmaster to abort the run
when any errors occur/tasks fail.
--abort-task-on-error Hint to osgdem to abort the build
when any errors occur (default.)
--bluemarble-east Set the coordinates system for next
texture or dem to represent the
eastern hemisphere of the earth.
--bluemarble-west Set the coordinates system for next
texture or dem to represent the
western hemisphere of the earth.
--build-options <string> Set build options string.
--building <filename> Specify building outlines using
shapefiles.
--cache <filename> Read the cache file to use a look up
for locally cached files.
--comment Added a comment/description string to
the top most node in the dataset
--compressed Use OpenGL compression on RGB
destination imagery
--cs <coordinates system string> Set the coordinates system of source
imagery, DEM or destination database.
The string may be any of the usual
GDAL/OGR forms, complete WKT, PROJ.4,
EPS
--default-color <r,g,b,a> Sets the default color of the
terrain.
--forest <filename> Specify forest outlines using
shapefiles
--formats List the supported source imagery and
DEM formats.
--geocentric Build a database in geocentric (i.e.
whole earth) database.
--height Set the height to use for asscociated
shapefiles.
--height-attribute Set the attribute name for height
attributes used in shapefile/dbase
files.
--ibn <buildname> Specify the intermediate build file
name
--image-ext <ext> Specify the Image format to output to
via its plugin name, i.e. rgb, dds,
jp2, jpeg.
--interpolate-imagery Enable the use of interpolation when
sampling data from source imagery.
--interpolate-terrain Enable the use of interpolation when
sampling data from source DEMs.
--layer <layer_num> Specify the layer that the next
source Texture will contribute to..
--layer-inheritance [Lowest/Nearest/No] Set the layer inheritance.
--levels <begin_level> <end_level> Specify the range of lavels that the
next source Texture or DEM will
contribute to.
--mask Set the mask to assign indivual
shapefile/model.
--max-anisotropy Max anisotropy level to use when
texturing, defaults to 1.0.
--max-visible-distance-of-top-level Set the maximum visible distance that
the top most tile can be viewed at
--mip-mapping-hardware Use mip mapped textures, and generate
the mipmaps in hardware when
available.
--mip-mapping-imagery Use mip mapped textures, and generate
the mipmaps in imagery.
--no-abort-run-on-error Hint to vpbmaster to disable abort of
the run when any errors occur
(default.)
--no-abort-task-on-error Hint to osgdem to disable abort of
the build when any errors occur.
--no-interpolate-imagery Disable the use of interpolation when
sampling data from source imagery.
--no-interpolate-terrain Disable the use of interpolation when
sampling data from source DEMs.
--no-mip-mapping Disable mip mapping of textures
--no-terrain-simplification Switch off terrain simplification.
--notify-level Set the notify level when logging
messages.
--optional-set <setname> Add setname to the list of optional
layers.
--radius-equator Set the polar radius of the ellipsoid
model when building a geocentric
database.
--radius-polar Set the polar radius of the ellipsoid
model when building a geocentric
database.
--radius-to-max-visible-distance-ratio Set the maximum visible distance
ratio for all tiles apart from the
top most tile. The maximum visuble
distance is computed from the ratio *
tile radius.
--range
--raster Interpret input as a raster data set
(default)
--read-threads-ratio <ratio> Set the ratio number of read threads
relative to number of cores to use.
--record-subtile-on-leaf-tiles Enable the setting of the subtile
file name of the leaf tiles.
--remove-optional-set <setname> Remove setname to the list of
optional layers.
--run-path Set the path that the build should be
run from.
--set <setname> Assign the set name of imagery/dem
data.
--skirt-ratio <float> Set the ratio of skirt height to tile
size
--spherical Set the polar and equator radius both
to the average of the two.
--split Set the distributed build split
level.
--splits Set the distributed build primary and
secondary split levels.
--subtile <LOD> <X> <Y> Set the subtile to begin the build
from.
--terrain-mask Set the overall mask to assign
terrain.
--tile-image-size Set the tile maximum image size
--tile-terrain-size Set the tile maximum terrain size
--type-attribute Set the type name which specify how
the shapes should be interpreted in
shapefile/dbase files.
--vector Interpret input as a vector data set
--version Print out version
--version-number Print out version number only.
--whole-globe Set the coordinates system for next
texture or dem to represent the whole
hemisphere of the earth.
--wkt <WKT string> Set the coordinates system of source
imagery, DEM or destination database
in WellKownText form.
--wkt-file <WKT file> Set the coordinates system of source
imagery, DEM or destination database
by as file containing WellKownText
definition.
--write-threads-ratio <ratio> Set the ratio number of write threads
relative to number of cores to use.
--xt
--xx
--yt
--yy
--zt
--zz
-O string option to pass to write
plugins, use " " for multiple options
-a <archivename> Specify the archive to place the
generated database
-d <filename> Specify the digital elevation map
input file to process
-e <x> <y> <w> <h> Extents of the model to generate
-h or --help Display this information
-l <numOfLevels> Specify the number of PagedLOD levels
to generate
-o <outputfile> Specify the output master file to
generate
-t <filename> Specify the texture map input file to
process
-v Set the vertical multiplier
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