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CentOS 7.0 - man page for gvmap (centos section 1)

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GVMAP(1)										 GVMAP(1)

       gvmap - find clusters and create a geographical map highlighting clusters.

       gvmap [ options ] [ -o outfile ] [ files ]

       gvmap  takes  as input a graph in DOT format, finds node clusters and produces a rendering
       of the graph as a geographic-style map, with clusters highlighted as  countries,  in  xdot

       In the input graph, each node must have position, width and height information (pos, width
       and height attributes, respectively) defined, and nodes must not overlap.

       By default, gvmap will generate the clusters from the data. If desired,	the  input  graph
       can  specify cluster information by giving every node a cluster attribute whose value is a
       small positive integer. Nodes sharing the same cluster attribute value will  be	put  into
       the  same  cluster. N.B. For the cluster attribute to be used, all nodes must have a valid

       If the input specifies the desired clustering as described above, it can  also  specify	a
       desired	coloring  by  having  some node in each cluster provide a clustercolor attribute.
       N.B. Unless one specifies -c0, only the clustercolor of the last node in a cluster has  an
       effect. In addition, unless one uses -O, gvmap may permute the given colors.

       The following options are supported:

       -a k   The  integer  k  specifies  the average number of artificial points added along the
	      bounding box of the labels. Such artificial points are added  to	avoid  a  country
	      boundary	cutting through the boundary box of the labels. Computing time is propor-
	      tional to k; hence, for large graphs, a small value of k is suggested. If k = -1, a
	      suitable value of k is automatically selected based on the graph size. By default k
	      = -1.

       -b v   The real number v specifies the line width used to  draw	the  polygon  boundaries,
	      with v < 0 for no line. By default v = 0.

       -c k   The integer k specifies color scheme used to color the countries. By default k = 1.

	  Acceptable values are:
		 0 : no polygons
		 1 : pastel
		 2 : blue to yellow
		 3 : white to red
		 4 : light grey to red
		 5 : primary colors
		 6 : sequential single hue red
		 7 : sequential single hue lighter red
		 8 : light grey

	      Specifies  a  two-character  hexadecimal string specifying the opacity of the poly-

       -C d   The integer d specifies the maximum number  of  clusters	(countries)  allowed.  By
	      default d = 0, which means that there is no limit.

       -d d   The  integer  d specifies the random seed used during color assignment optimization
	      that maximize color difference between neighboring countries.

       -e     If specified, edges will be included in the final output.

       -g c   Specifies the bounding box color. If not specified, a bounding box is not drawn.

       -h k   The number of artificial points added to maintain a bridge  between  endpoints.  By
	      default, this is zero.

	      Only draw cluster k. By default, all clusters are drawn.

       -k     If specified, increases the randomness of outer boundary.

       -l s   Use the string s as a label for the drawing.

       -m v   Generate a margin of v points around the drawing. By default, this is determined by

       -O     Do NOT do color assignment optimization that maximizes  color  differences  between
	      neighboring countries

	      Put output in <file>. Default output is stdout

       -p k   Indicates what level of points should be shown. By default, no points are shown.

	  Acceptable values are:
		 0 : no points
		 1 : all points
		 2 : label points
		 3 : random/artificial points

       -r k   The  number of random points k (integer) used to define sea and lake boundaries. If
	      0, auto assigned. By default v = 0

       -s v   The real number v specifies the depth of the sea and lake shores in points.  If  0,
	      auto assigned. By default v = 0.

       -t n   Make n attempts to improve cluster contiguity.

       -v     Verbose mode.

       -z c   Specified the polygon line color. Default is black.

       -?     Print usage and exit.

       Given  a graph foo.gv, one way to generate a layout and highlight the clusters is to first
       select a layout engine with a suitable overlap removal method, then  feed  the  output  to
       gvmap, and finally render the map using specific graphics format. For example, the follow-
       ing pipeline creates a map with edges in semi-transparent light gray and  nodes	laid  out
       using sfdp:

       sfdp -Goverlap=prism foo.gv | gvmap -e | neato -n2 -Ecolor=#55555522 -Tpng > foo.png

       The  shell script gvmap.sh provides a shorthand for such pipelines. For example, the above
       pipeline can be achieved using

       gvmap.sh -Ae -Ecolor=#55555522 -Tpng foo.gv > foo.png

       Yifan Hu <yifanhu@research.att.com>

       gvmap.sh(1), sfdp(1), neato(1), gvpr(1)

       E. R. Gansner, Y. Hu, S. G. Kobourov, "GMap: Visualizing graphs	and  clusters  as  maps,"
       Proc. Pacific Vis. 2010, pp. 201-208.

					   3 March 2011 				 GVMAP(1)

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