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Manpage of polargrid
polargrid
Section: User Commands (1)
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NAME
polargrid  Regrid an image to a polar coordinate system
PERSON RESPONSIBLE
pjt
CATEGORIES
map analysis
DESCRIPTION
Sample an image in terms of a polar coordinate system and create
a new image where the xaxis is the azimuthal coordinate and the
yaxis is the radial coordinate. The radial coordinate can be
in either decimal or logarithmic units.
See also the REGRID program for more WCS based transformations.
Note this program assumes an astronomical image, and square pixels.
PARAMETERS
 in

Input data cube.
No default.
 out

Interpolated regridded output data cube.
No default.
 center

Center of the polar coordinate system, in pixels where
(1,1) is the lower left point in a map.
By default the mapcenter will be taken.
 phase

Polar coordinate phase angle (degrees).
Default: 0.0
 radius

Starting, ending and step value in radial grid.
Optionally these three numbers can be followed by the
coordinate type (a string). Currently supported are 'linear',
The units of the radii are in the units of that
coordinate system.
Example: 1,2,0.01,log is a logarithmic axis from 0.1" to 100"
By default the all pixels will fit in the output map, with a
linear grid and stepsize of 1 pixel.
 angle

Starting, ending and stepsize in polar angle, as measured from
the phase angle given earlier. If the starting angle is larger
than the ending angle, the coordinate system will be defined
with angle increasing in the clockwise sense rather than
in a counterclockwise sense. Angles are given in degrees.
** i believe the program does the reverse **
Default: 180,180,1
Index
 NAME

 PERSON RESPONSIBLE

 CATEGORIES

 DESCRIPTION

 PARAMETERS

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Time: 18:35:38 GMT, July 05, 2011