'''OSSIM Helicopter Landing Zone Utility''' This utility finds acceptable helicopter landing zones given terrain data and LZ criteria. The output is an 8-bit, single band, raster image. Options exist for customizing the output pixel values including an option to generate a color raster with the use of a look-up table. {{{ Usage: ossim-hlz [options] Options: --dem Specifies the input DEM filename. If none provided, the elevation database is referenced as specified in prefs file for the ROI specified --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 --gsd Specifies output GSD in meters. Defaults to the same resolution as best input DEM. Alternatively, if a DEM file is specified, the product GSD defaults to the input DEM's GSD. --lut Specifies the optional lookup table filename for mapping the single-band output image to an RGB. The LUT provided must be in the ossimIndexToRgbLutFilter format and must handle the discrete output 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. --reticle Specifies the size of the reticle at the destination pointlocation in pixels from the center (i.e., the radius of the reticle). Defaults to 10. A value of 0 hides the reticle. See --values option for setting reticle color. --rlz Specifies minimum radius of landing zone. Defaults to 25 m. --roi radius of interest surrounding the destination point. If absent, the product defaults to 1024 x 1024 pixels, with a radius of 512 * GSD. Alternatively, if a DEM file is specified, the product ROI defaults to the full DEM coverage. --roughness Specifies the terrain roughness threshold (meters).This is the maximum deviation from a flat plane permitted. Defaults to 0.5 m. --simulation For engineering/debug purposes --size Instead of a radius of interest, directly specifies the dimensions of the output product in pixels (output is square). Required unless --roi is specified and/or an inout DEM is specified. --slope Threshold for acceptable landing zone terrain slope. Defaults to 7 deg. --summary Causes a product summary to be output to the console. --target The center target destination around which suitable HLZs are identified. This can be omitted if an input DEM file is provided, in which case the center of the DEM is the target. --threads Number of threads. Defaults to use all available cores. For engineering/debug purposes. --values Specifies the pixel values (0-255) for the output product corresponding to bad, marginal, and good landing zones, respectively, with the fourth value representing the reticle value. Defaults to bad=0 (null), marg=1, , good=2, and reticle is highlighted with 3. -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-hlz --roi 5000 --rlz 25 --target 25.5000 -80.000 output-hlz.tif ossim-hlz --dem mydata.hgt --rlz 25 output-hlz.tif }}}