agpy 0.1 documentation

Source code for agpy.region_positions

import numpy
try:
    import coords

[docs] def position_region(reg): """ small wrapper to get a Position object using the correct coordinate system reg must by a pyregion Shape instance """ x,y = reg.coord_list[:2] posn = coords.Position([x,y],system=coords_format(reg.coord_format)) return posn
[docs] def coords_format(format): """ Convert from ds9's 'fk5' and 'icrs' naming convention to the 'celestial'/'galactic' used by coords """ if format == 'galactic': return 'galactic' elif format in ['fk5','icrs']: return 'celestial'
[docs] def pos_to_name(reg): """ Given a region, returns a name based on Galactic coordinates """ l,b = position_region(reg).galactic() if numpy.sign(b) == 1: pm = "+" else: pm = "-" text = "G%4.2f%1s%4.2f" % (l,pm,abs(b)) return text
except ImportError: print "region_positions requires coords"