1.1.3.0 coordsys.conversiontype

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coordsys.conversiontype - Function

1.1.3 Get extra reference conversion layer
Description

Some coordinates contain a reference code. Examples of reference codes are B1950 and J2000 for direction coordinates, or LSRK and BARY for spectral coordinates. When you do conversions between pixel and world coordinate, the coordinates are in the reference frame corresponding to these codes.

Function setconversiontype allows you to specify a different reference frame which is used when converting between world and pixel coordinate.

This function allows you to recover those conversion types. If no extra conversion layer has been set, you get back the native reference types.

"""
#
print "\t----\t conversiontype Ex 1 \t----"
csys = cs.newcoordsys(direction=T, spectral=T)
print csys.conversiontype (type=’direction’), ’ ’, csys.conversiontype (type=’spectral’)
#J2000 LSRK
csys.setconversiontype (direction=’GALACTIC’, spectral=’BARY’)
print csys.conversiontype (type=’direction’), ’ ’, csys.conversiontype (type=’spectral’)
#GALACTIC BARY
#
"""

Arguments


Inputs
type	Coordinate type, direction, spectral
	allowed:	string
	Default:	direction

Returns
string

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