1.1.3.0 coordsys.setdirection

coordsys.setdirection - Function

1.1.3 Set direction coordinate values
Description

When you construct a Coordsys tool, if you include a Direction Coordinate, it will have some default parameters. This function simply allows you to replace the values of the Direction Coordinate.

You can also change almost all of those parameters (such as projection, reference value etc.) via the individual functions setreferencecode, setprojection, setreferencepixel, setreferencevalue, setincrement, and setlineartransform provided by the Coordsys tool. See those functions for more details about the formatting of the above function arguments.

Bear in mind, that if your Coordinate System came from a real image, then the reference pixel is special and you should not change it.

Arguments


Inputs
refcode	Reference code. Default is no change.
	allowed:	string
	Default:
proj	Projection type. Default is no change.
	allowed:	string
	Default:
projpar	Projection parameters. Default is no change.
	allowed:	doubleArray
	Default:	-1
refpix	Reference pixel. Default is no change.
	allowed:	doubleArray
	Default:	-1
refval	Reference value. Default is no change.
	allowed:	any
	Default:	variant
incr	Increment. Default is no change.
	allowed:	any
	Default:	variant
xform	Linear transform. Default is no change.
	allowed:	any
	Default:	variant
poles	Native poles. Default is no change.
	allowed:	any
	Default:	variant

Returns
bool

Example

"""
#
print "\t----\t setdirection Ex 1 \t----"
csys = cs.newcoordsys(direction=T);
csys.setdirection (refcode=’GALACTIC’, proj=’SIN’, projpar=[0,0],
                   refpix=[-10,20], refval="10deg -20deg");
print csys.projection()
#{’type’: ’SIN’, ’parameters’: array([ 0.,  0.])}
print csys.referencepixel()
#{’ar_type’: ’absolute’, ’pw_type’: ’pixel’, ’numeric’: array([-10.,  20.])}
print csys.referencevalue(format=’s’)
#{’ar_type’: ’absolute’, ’pw_type’: ’world’,
# ’string’: array([’10.00000000 deg’, ’-20.00000000 deg’], dtype=’|S17’)}
#
"""

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