== OSSIM Viewshed Utility == Computes the viewshed for the given observer position. The output is a geotiff image representing hidden and visible points within the field-of-view. Usage: ossim-viewshed [options] Options: --disable-elev Will disable the elevation --disable-notify Takes an argument. Arguments are ALL, WARN, NOTICE, INFO, FATAL, DEBUG. If you want multiple disables then just do multiple --disable-notify on the command line. All argument are case insensitive. Default is all are enabled. --disable-plugin Will disable the plugin loader --fov Optional arguments specifying the field-of-view boundary azimuths (in degrees). By default, a 360 deg FOV is computed. The arc is taken clockwise from start to end, so for a FOV of 225 deg from W, through N to SE, start=270 and end=135 --gsd Specifies output GSD in meters. Defaults to the same resolution as input DEM. --hgt-of-eye Specifies the observers height-of-eye above the terrain in meters. Defaults to 1.5 m. --dem Specifies the input DEM filename. If none provided, the elevation database is referenced as specified in prefs file --lut Specifies the optional lookup table filename for mapping the single-band output image to an RGB. The LUT provided is in the ossimIndexToRgbLutFilter format and must handle the three output viewshed values (see --values option). --ossim-logfile takes a logfile as an argument. All output messages are redirected to the specified log file. By default there is no log file and all messages are enabled. --radius Specifies max visibility in meters. Required unless --size is specified. This option constrains output to a circle, similar to a radar display --reticle Specifies the size of the reticle at the observer location in pixels from the center (i.e., the radius of the reticle). Defaults to 2. A value of 0 hides the reticle. See --values option for setting reticle color. --simulation For engineering/debug purposes --size Instead of a visibility radius, directly specifies the dimensions of the output product in pixels (output is square). Required unless --radius is specified. --summary Causes a product summary to be output to the console. --tbs "Thread By Sector". For engineering/debug purposes --threads Number of threads. Defaults to number of cores available. For engineering/debug purposes. --values Specifies the pixel values (0-255) for the visible, hidden and reticle pixels, respectively. Defaults to visible=null (0), hidden=128, and observer position reticle is highlighted with 255. -K specify individual keywords to add to the preferences keyword list: name=value -P specify a preference file to load -T specify the classes to trace, ex: ossimInit|ossimImage.* will trace ossimInit and all ossimImage classes -V or --version Display version information. Examples: ossim-viewshed --radius 10000 41.5 -110.5 output.tif[[BR]] ossim-viewshed --size 1024 41.5 -110.5 output.tif