Content-type: text/html Manpage of polargrid

polargrid

Section: User Commands (1)
Index Return to Main Contents
 

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 x-axis is the azimuthal coordinate and the y-axis 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

This document was created by man2html, using the manual pages.
Time: 18:35:38 GMT, July 05, 2011