NAME
       SVG::Plot - a simple module to take a set of x,y points and plot them on a plane

SYNOPSIS
       use SVG::Plot;
       my $points = [[0,1,'http://uri/'],[2,3,'/uri/foo.png]];
       my $plot = SVG::Plot->new(
                                  points => \@points,
                                  debug => 0,
                                  scale => 0.025,
                                  max_width => 800,
                                  max_height => 400,
                                  point_size => 3,
                                  point_style => {
                                  fill => 'blue',
                                  stroke => 'yellow'},
                                  line => 'follow',
                                  margin => 6,
                                ); 
       # -- or --
       $plot->points($points);
       $plot->scale(4);

       print $plot->plot;

    If "debug" is set to true then debugging information is emitted as
    warnings. Note that the actual margin will be half of the value set in
    "margin", since half of it goes to each side. If "max_width" and/or
    "max_height" is set then "scale" will be reduced if necessary in order
    to keep the width down.

    "plot" will croak if "max_width" or "max_height" is smaller than
    "margin", since this is impossible.

DESCRIPTION
    a very simple module which allows you to give a set of points [x co-ord,
    y co-ord and optional http uri]) and plot them in SVG.

    $plot->points($points) where $points is a reference to an array of array
    references.

    see the SYNOPSIS for a list of parameters you can give to the plot.
    (overriding the styles on the ponts; sizing a margin; setting a scale;
    optionally drawing a line ( line => 'follow' ) between the points in the
    order they are specified.

    you can supply a grid in the format SVG::Plot->new( grid => { min_x =>
    1, min_y => 2, max_x => 15, max_y => 16 } );

    or $plot->grid($grid)

    this is like a viewbox that shifts the boundaries of the plot.

    if it's not specified, the module works out the viewbox from the highest
    and lowest X and Y co-ordinates in the list of points.

NOTES
    this is a very, very early draft, released so Kake can use it in
    OpenGuides without having non-CPAN dependencies.

    for an example of what i should be able to do with this, see
    http://space.frot.org/rdf/tubemap.svg ... a better way of making
    meta-information between the lines, some kind of matrix drawing

    also, i want to supply access to different plotting algorithms, not just
    for the cartesian plane; particularly the buckminster fuller dymaxion
    map; cf Geo::Dymaxion, when that gets released
    (http://iconocla.st/hacks/dymax/ )

    to see work in progress, http://frot.org/hacks/svgplot/ ; suggestions
    appreciated.

BUGS
    full of them i am sure; this is a very alpha release; i won't change
    existing the API (if it deserves the name) though.

AUTHOR
        Jo Walsh  ( jo@london.pm.org )
        Kate L Pugh ( kake@earth.li )