1GVMAP(1) General Commands Manual GVMAP(1)
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6 gvmap - find clusters and create a geographical map highlighting clus‐
7 ters.
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10 gvmap [ options ] [ -o outfile ] [ files ]
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13 gvmap takes as input a graph in DOT format, finds node clusters and
14 produces a rendering of the graph as a geographic-style map, with clus‐
15 ters highlighted as countries, in xdot format.
16 In the input graph, each node must have position, width and height
18 information (pos, width and height attributes, respectively) defined,
19 and nodes must not overlap.
20 By default, gvmap will generate the clusters from the data. If desired,
22 the input graph can specify cluster information by giving every node a
23 cluster attribute whose value is a small positive integer. (It is works
24 best if cluster values are all integers in the interval [1,K] for some
25 K. Nodes sharing the same cluster attribute value will be put into the
26 same cluster. N.B. For the cluster attribute to be used, all nodes must
27 have a valid value.
28 If the -D flag is used, gvmap will use the top-level cluster subgraphs
30 to determine the clustering. Any nodes not in such a cluster will be
31 put into a single catch-all cluster.
32 If the input specifies the desired clustering as described above, it
34 can also specify a desired coloring by having some node in each cluster
35 provide a clustercolor attribute. N.B. Unless one specifies -c0, only
36 the clustercolor of the last node in a cluster has an effect. In addi‐
37 tion, unless one uses -O, gvmap may permute the given colors.
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40 The following options are supported:
41 -a k The integer k specifies the average number of artificial points
43 added along the bounding box of the labels. Such artificial
44 points are added to avoid a country boundary cutting through the
45 boundary box of the labels. Computing time is proportional to k;
46 hence, for large graphs, a small value of k is suggested. If k =
47 -1, a suitable value of k is automatically selected based on the
48 graph size. By default k = -1.
49 -b v The real number v specifies the line width used to draw the
51 polygon boundaries, with v < 0 for no line. By default v = 0.
52 -c k The integer k specifies color scheme used to color the coun‐
54 tries. By default k = 1.
55 Acceptable values are:
57 0 : no polygons
58 1 : pastel
59 2 : blue to yellow
60 3 : white to red
61 4 : light grey to red
62 5 : primary colors
63 6 : sequential single hue red
64 7 : sequential single hue lighter red
65 8 : light grey
66 -c_opacity=xy
68 Specifies a two-character hexadecimal string specifying the
69 opacity of the polygons.
70 -C d The integer d specifies the maximum number of clusters (coun‐
72 tries) allowed. By default d = 0, which means that there is no
73 limit.
74 -d d The integer d specifies the random seed used during color
76 assignment optimization that maximize color difference between
77 neighboring countries.
78 -D If specified, the graph's cluster subgraphs are used to specify
80 the clustering.
81 -e If specified, edges will be included in the final output.
83 -g c Specifies the bounding box color. If not specified, a bounding
85 box is not drawn.
86 -h k The number of artificial points added to maintain a bridge
88 between endpoints. By default, this is zero.
89 -highlight=k
91 Only draw cluster k. By default, all clusters are drawn.
92 -k If specified, increases the randomness of outer boundary.
94 -l s Use the string s as a label for the drawing.
96 -m v Generate a margin of v points around the drawing. By default,
98 this is determined by gvmap.
99 -O Do NOT do color assignment optimization that maximizes color
101 differences between neighboring countries
102 -o<file>
104 Put output in <file>. Default output is stdout
105 -p k Indicates what level of points should be shown. By default, no
107 points are shown.
108 Acceptable values are:
110 0 : no points
111 1 : all points
112 2 : label points
113 3 : random/artificial points
114 -Q Use modularity quality for clustering rather than the default
116 modularity clustering.
117 -r k The number of random points k (integer) used to define sea and
119 lake boundaries. If 0, auto assigned. By default v = 0
120 -s v The real number v specifies the depth of the sea and lake shores
122 in points. If 0, auto assigned. By default v = 0.
123 -t n Make n attempts to improve cluster contiguity.
125 -v Verbose mode.
127 -z c Specified the polygon line color. Default is black.
129 -? Print usage and exit.
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133 Given a graph foo.gv, one way to generate a layout and highlight the
134 clusters is to first select a layout engine with a suitable overlap
135 removal method, then feed the output to gvmap, and finally render the
136 map using specific graphics format. For example, the following pipeline
137 creates a map with edges in semi-transparent light gray and nodes laid
138 out using sfdp:
139 sfdp -Goverlap=prism foo.gv | gvmap -e | neato -n2 -Ecolor=#55555522
141 -Tpng > foo.png
142 The shell script gvmap.sh provides a shorthand for such pipelines. For
144 example, the above pipeline can be achieved using
145 gvmap.sh -Ae -Ecolor=#55555522 -Tpng foo.gv > foo.png
147
151 Yifan Hu <yifanhu@yahoo.com>
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154 gvmap.sh(1), sfdp(1), neato(1), gvpr(1)
155 E. R. Gansner, Y. Hu, S. G. Kobourov, "GMap: Visualizing graphs and
157 clusters as maps," Proc. Pacific Vis. 2010, pp. 201‐208.
158 3 March 2011 GVMAP(1)