ACTION = _CHAR (Read and Write)
The way in which the world coordinate
limits are to be determined:
-
"
DATA"
– The limits are calculated from the data limits, with a small border added.
-
"
DATA0"
– The limits are calculated as for DATA, but the origin is included as one of the data
points.
-
"
GIVEN"
– The limits specified on the command line are used.
-
"
RECALL"
– The coordinates are recalled from a previous plot using the AGI database.
[The value is prompted for.]
XMIN = _REAL (Read and Write)
The world coordinate of the
left-hand edge of the plot.
The application will determine the value if ACTION is one of "
DATA"
, "
DATA0"
or "
RECALL"
. If
ACTION="
GIVEN"
and no value is specified on the command line, the value of the global parameter
PONGO_XMIN is used.
XMAX = _REAL (Read and Write)
The world coordinate of the right-hand
edge of the plot.
The application will determine the value if ACTION is one of "
DATA"
, "
DATA0"
or "
RECALL"
. If
ACTION="
GIVEN"
and no value is specified on the command line, the value of the global parameter
PONGO_XMAX is used.
YMIN = _REAL (Read and Write)
The world coordinate of the lower edge
of the plot.
The application will determine the value if ACTION is one of "
DATA"
, "
DATA0"
or "
RECALL"
. If
ACTION="
GIVEN"
and no value is specified on the command line, the value of the global parameter
PONGO_YMIN is used.
YMAX = _REAL (Read and Write)
The world coordinate of the upper edge
of the plot.
The application will determine the value if ACTION is one of "
DATA"
, "
DATA0"
or "
RECALL"
. If
ACTION="
GIVEN"
and no value is specified on the command line, the value of the global parameter
PONGO_YMAX is used.
PICLAB = _CHAR (Read and Write)
The AGI label of the picture to be
recalled.
[If ACTION="
RECALL"
, the value is prompted for.]
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. ERSCALE is
used only when ACTION = "
DATA"
or "
DATA0"
. [The value of the global parameter
PONGO_ERSCALE is used. If PONGO_ERSCALE is not defined, the default value 1.0 is used.]