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ccdtrace - interpolate a set of coordinates from an image
ccdtrace
[parameter=value]
ccdtrace takes a set of (X,Y) coordinates,
in the form of an ascii table(1NEMO)
, and interpolates them from an image(1NEMO)
.
The output will also be in standard table format. The input coordinate must
be in the physical coordinates of the input image, as defined by Xmin/Ymin/Dx/Dy
coordinates (see tsf(1NEMO)
to view them). Sky image copied via FITS can
sometimes have unexpected units. See also fits(5NEMO)
.
The following
parameters are recognized in order; they may be given in any order if the
keyword is also given. Use --help to confirm this man page is up to date.
- in=image
- Input Image(5NEMO)
file. Currently only 2D images are supported,
for 3D cubes the first plane could be used. No default.
- out=xyi_table
- Output
table of X,Y,I coordinates. No default.
- xytab=xy_table
- Input table of X,Y
coordinates (in units of the WCS of the input image). No default.
- nmax=
- Allocation
space for input XY table, if needed. This value is only needed when the
XY table is read from a device which cannot seek (e.g. a pipe). Default: 10000.
- cumul=t|f
- Add a 4th column in the output which is the culumative length,
in the native units. Default: f
- wcs=t|f
- By default, the table is assumed
to be in WCS (the units used in the image), but with wcs=f you can use
pixel coordinates.
- dx=
- Optional X offset added to table. [Default: 0]
- dy=
- Optional Y offset added to table. [Default: 0]
src/nbody/evolve/flowcode/ccdtrace.c
ccdprint(1NEMO)
, tsf(1NEMO)
, image(5NEMO)
, fits(5NEMO)
, ccdfits(1NEMO)
Peter Teuben
31-jul-96 V1.0 Created Peter Teuben
26-sep-2001 V1.0a updated doc, fixed code for file_lines PJT
26-jul-2015 V1.1 added cumul=t option PJT
26-jul-2015 V1.2 added wcs=f option PJT
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