The ranges of the
data given in the
XCOL and
XCOL data areas are used to set the world coordinate limits for plotting.
A small border is also added to the data limits when calculating the world coordinate
limits.
This command is a synonym for WORLD DATA.
XMIN = _REAL (Read
and Write)
The world coordinate of the left-hand edge of the plot.
The application will determine the value.
XMAX = _REAL (Read and Write)
The world coordinate
of the right-hand edge of the plot.
The application will determine the value.
YMIN = _REAL (Read and Write)
The world coordinate
of the lower edge of the plot.
The application will determine the value.
YMAX = _REAL (Read and Write)
The world coordinate
of the upper edge of the plot.
The application will determine the value.
PROJECTION = _CHAR (Read and Write)
The geometry
to be used for plotting the data. This is explained in more detail in the section on projections.
Allowed values:
"NONE
",
"TAN
",
"SIN
",
"ARC
",
"GLS
",
"AITOFF
",
"MERCATOR
" and
"STG
".
[The value of the global parameter PONGO_PROJECTN is used. If PONGO_PROJECTN is not
defined, the default value "NONE" is used.]
RACENTRE = _CHAR (Read and Write)
The centre of
the projection in RA (
i.e. the angle must be specified as hh:mm:ss.sss). This parameter is only required
for PROJECTION values other than
"NONE
".
[The value of the global parameter PONGO_RACENTRE is used. If PONGO_RACENTRE is not
defined, the default value "0" is used.]
DECCENTRE = _CHAR (Read and Write)
The centre of the
projection in declination (
i.e. the angle must be specified as dd:mm:ss.sss). This parameter is only
required for PROJECTION values other than
"NONE
".
[The value of the global parameter PONGO_DECCENTRE is used. If PONGO_DECCENTRE is not
defined, the default value "0" is used.]
ERSCALE = _REAL (Read)
The scale factor to be applied to
the EXCOL and EYCOL data when determining the limits of the world co-ordinates. [The value of the
global parameter PONGO_ERSCALE is used. If PONGO_ERSCALE is not defined, the default value
1.0 is used.]