COMMAND TYPE : GRAPHIC
To plot an overlay map.
INPUT FIELDS of the command:
The files created by DB_OVER can be used to
draw the overlay maps with this command.
The files contain the coordinates of the sky center fields, the stars positions
and the coordinates of the superimposed objects written in an ad hoc format.
This command use these coordinates to make the overlay maps on a specific
graphic device. The user can read the next chapter to have more information
about the hard copy devices available in his DIRA implementation.
The name of the file created from DB_OVER command that must be used to
Example : FOR012.DAT
Output graphic device:
The name of the output graphic device. The user can
enter a ? to have a list
of the device available in his installation. The names are assigned by the
system manager at the moment of the installation of DIRA package and have a
syntax when the AGL or GKS graphic library is in use.
Example : HPLOT
Plot overlay: from N. to N.
The DB_OVER command can create the data for more overlay at a time. Then the
user can decide to plot only a subset of these. Here the user must enter
the number of the first and of the last overlay map that he needs to plot.
Example : 10 25
Stars magnitude limits
If in a sky region the stellar density is too high
then the overlay map can result confused because filled
too many symbols. The user can select, to avoid that,
plot the stars that have a magnitude greater than this value.
Example : 7.5
Size in cm. of the overlays x
In this fields the user must define the X and Y size of the output map.
The values that are entered here must agree with the values of the scale and
the half width defined in the DB_OVER command. The user must pay attention
change the default values to avoid conflicts with the data in the input file
Example : 10.8 10.8
The output of this task is graphic metafiles (xxxxx.PLT) where xxxxx is a
mnemonic for the graphic device type. The user must send these files to the
physical device with an appropriate system command.
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