Provided by: libncarg-dev_6.4.0-9_amd64 
NAME
ARDBPA - Produces a plot showing all of the edge segments in an area map that have a
specified group identifier IGRP; if IGRP is less than or equal to zero, all groups are
included. Such plots allow one to debug problems with an area map.
SYNOPSIS
CALL ARDBPA (MAP,IGRP,LABEL)
C-BINDING SYNOPSIS
#include <ncarg/ncargC.h>
void c_ardbpa (int *map, int igrp, char *label)
DESCRIPTION
MAP (an input/output array of type INTEGER) - An array containing an area map that
has at least been initialized by a call to ARINAM and to which edges will
probably have been added by calls to AREDAM.
Note: As part of initializing the area map, ARINAM stores the dimension of MAP
in MAP(1); therefore, the dimension does not have to be given as an argument
in calls to ARDBPA.)
IGRP (an input expression of type INTEGER) - The group identifier of the group that
you want to examine. If IGRP is less than or equal to zero, edges from all
groups will be shown.
LABEL (an input constant or variable of type CHARACTER) - The label you want put on
the plot.
C-BINDING DESCRIPTION
The C-binding argument descriptions are the same as the FORTRAN argument descriptions.
USAGE
When ARDBPA is called, it draws the requested picture and then calls FRAME to advance to a
new frame.
By default, each edge segment in the plot appears in one of four different colors,
depending on whether the area identifiers to the left and right are less than or equal to
zero or greater than zero, as follows:
Color Left area identifier Right area identifier
----- -------------------- ---------------------
Magenta Less than or equal to 0 Less than or equal to 0
Yellow Less than or equal to 0 Greater than 0
Cyan Greater than 0 Less than or equal to 0
White Greater than 0 Greater than 0
In some cases you may notice gray lines in your plot. This means that the same edge occurs
in more than one group. In all but one of those groups, Areas negates the group identifier
for the edge in the area map. This allows Areas to include the edge when it is looking at
a particular group (as in ARPRAM), but omit it when it is looking at the union of all the
groups (as in ARSCAM).
Color indices DC+1 through DC+5 are used for the required colors. The default value of DC
is 100, so, by default, ARDBPA redefines color indices 101 through 105. If this would
result in colors that you have defined being redefined, you should change the value of DC
to something else.
Nominally, each edge segment is shown with an arrowhead, indicating the order in which the
points defining the edge segment occur in the area map and therefore which side of the
edge segment is to the left and which side is to the right. In regions where putting an
arrowhead on each edge segment would result in too much clutter, some of them may be
omitted.
The left and right area identifiers for each edge segment are written in the appropriate
positions relative to the edge segment. Also, if IGRP is less than or equal to zero, the
group identifier for each edge segment is written on the segment itself. These
identifiers are intentionally written using very small characters; the idea is that you
can look at the whole plot to get some idea of possible problem regions; when such a
region is found, you can enlarge it, using the "zoom" capability of "idt", for a closer
look; at that point, the area identifiers become readable.
If ARDBPA is used for a complicated area map, the amount of output can be very large.
EXAMPLES
Use the ncargex command to see the following relevant examples: arex01, cardb2.
ACCESS
To use ARDBPA or c_ardbpa, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c,
preferably in that order.
SEE ALSO
Online: areas, areas_params, ardrln, aredam, argeti, argetr, argtai, arinam, armvam,
arpram, arscam, arseti, arsetr, ncarg_cbind
Hardcopy: NCAR Graphics Contouring and Mapping Tutorial
COPYRIGHT
Copyright (C) 1987-2009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.