ossim-hlz [options] <output-image>
- --dem
<filename>
- Specifies the input DEM filename to use for level-1 processing. 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
<meters>
- 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.
- --ls-fit
- Slope is computed via an LS fit to a plane instead of the default slope
computation using differences to compute normal vector.
- --lut
<filename>
- 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).
- --mask
<filename>
- Either a Keyword-list file or raster image. The KWL file can contain
multiple mask files and how to interpret them, i.e., whether non-null
pixels define exclusion zones (cannot land inside) or inclusion (must land
inside). A single mask raster image is assumed to represent exclusion
zones.
- --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.
- --output-slope
<filename.tif>
- Generates a slope byproduct image (floating point degrees) to the
specified filename. Only valid if normal-vector method used (i.e.,
--ls-fit option NOT specified)
- --pc | --point-cloud
<filename>
- Specifies ancillary point-cloud data file for level-2 search for
obstructions.
- --request-api
- Causes applications API to be output as JSON to stdout. Accepts optional
filename to store JSON output.
- --reticle
<int>
- Specifies the size of the reticle at the destination point location 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
<meters>
- Specifies minimum radius of landing zone. Defaults to 25 m.
- --roi
<meters>
- 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
<meters>
- Specifies the terrain roughness threshold (meters). This is the maximum
deviation from a flat plane permitted. Defaults to 0.5 m. Valid only with
--ls-fit specified.
- --simulation
- For engineering/debug purposes
- --size
<int>
- 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
<degrees>
- Threshold for acceptable landing zone terrain slope. Defaults to 7
deg.
- --summary
- Causes a product summary to be output to the console.
- --target
<lat> <lon>
- 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
<n>
- Number of threads. Defaults to use single core. For engineering/debug
purposes.
- --values <bad
marg good ret>
- 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
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.
- ossim-hlz [options] --roi 5000 --rlz 25 --target 25.5000 -80.000
output-hlz.tif ossim-hlz [options] --dem mydata.hgt --rlz 25
output-hlz.tif
The full documentation for ossim-hlz is maintained as a
Texinfo manual. If the info and ossim-hlz programs are
properly installed at your site, the command
- info ossim-hlz
should give you access to the complete manual.