Table of Contents
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 any order if the keyword is also given:
- 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.
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
Table of Contents