Draw a coordinate grid at specified intervals GRID
If no value is specified on the command line, the current value is used. The current value is initially set to 0.0.
If no value is specified on the command line, the current value is used. The current value is initially set to 360.0.
If no value is specified on the command line, the current value is used. The current value is initially set to 30.0.
If no value is specified on the command line, the current value is used. The current value is initially set to -90.0.
If no value is specified on the command line, the current value is used. The current value is initially set to 90.0.
If no value is specified on the command line, the current value is used. The current value is initially set to 10.0.
"
NONE"
, "
TAN"
, "
SIN"
,
"
ARC"
, "
GLS"
, "
AITOFF"
, "
MERCATOR"
and "
STG"
.
This parameter is not specified on the command line. The value of the global parameter
PONGO_PROJECTN is used. If PONGO_PROJECTN is not defined, the default value "
NONE"
is
used.
"
NONE"
.
This parameter is not specified on the command line. The value of the global parameter
PONGO_RACENTRE is used. If PONGO_RACENTRE is not defined, the default value "
0"
is used.
"
NONE"
.
This parameter is not specified on the command line. The value of the global parameter
PONGO_DECCENTRE is used. If PONGO_DECCENTRE is not defined, the default value "
0"
is used.
It is sometimes necessary to specify the grid intervals in a manner which avoids rounding errors to obtain the last grid line. e.g 9.9999 instead of 10. You may also need to sometimes draw the grid twice using say 30.00001 as well as 29.99999 to get this final line.