-verbose
tells the user what is happening. Log output goes to
stdout
-usage
prints a usage list and then exits
-slots
displays the
pups(3)
library
dependencies in short format for this program and then exits.
-slotinfo
displays the
pups(3)
library
dependencies in long format for this program and then exits.
-version
prints the current version number for this program and then exists.
-argf <argument_file> reads the command tail from the argument file. The data format for this file is:
optional comment ...
-argflag <parameter list>
# ... Optional comment ...
-argflag <parameter list>
-nice
<nice level>
sets the scheduling level for the program. As this is an interactive display
program,
<nice level>
defaults to 4.
-growth_protection
retrys
causes the system to retry an
sbrk(2)
up to
retrys
times. This option permits the program to wait until the core that it requires
is available rather than simply exiting if
sbrk(2)
fails.
-input_image
image name
specifies the name of the image which is to be warped.
-grid
warp_rows
warp_cols
specifies the dimensions of the grid describing the warp. This option and the
-gridfile
option are mutually exclusive.
-output_size output_rows output_cols specifies the size of the output image (defaults to size of input image). The regular grid G coincides with this image area.
-grab
disables bilinear interpolation.
The nearest grid point is sampled instead (zero if outside image).
-gridfile
grid file name
reads in a
gridfile
which specifies the diemsions of the warp grid, and in addition the extent of the DTM which is
to be used to warp the image into a map projection. The
-gridfile
and
-grid
options are mutually exclusive.
-wait
tells
npraw(1)
to wait until
grid file name
is created. This option is used by the
gti(1)
harness to ensure the orthoimage pipeline functions irrespective of which filter in that pipeline
is scheduled to run first. This option is only recognised if
-gridfile
is also specified.
-extent
ox oy sx sy
species the extent of DTM used to warp the input image. Note that the origin is in the bottom left
hand corner of the DTM. This option and the
-gridfile
option are mutaully exclusive.
-no_data
white | black
specifies the "no data" e.g. background value for the orthoimage. It may be either black (in which case the
orthoimage is generated in a black background) or white (in which case the orthoimage is generated in a
white background). Defaults to white.
-grid_image_extent
rows
cols
specifies the extent of the warp grid in image spece. This is use to compute the scaling factors which must be applied
to map the warp grid into the input image. For example, if we are processing any SPOT PA derived image product the
rows
and
cols
parameters must be set to 6000 (the nominal size of SPOT PA imagery).
SH SIGNALS
SIGUSR2 is used to support PSRP event handling