I don't really follow your code, but since you say you are having problems with the PolyLine, you may want to look at Goo::Canvas Waypoint marker w zoom/save to svg and pdf.

First, to update a PolyLine, you must manually set the points option, it is not defined by default. Also, points takes an array_ref , NOT an array. It should go something like this: 

  my $num_points = \@shape;  # an array_ref
   print "$num_points\n";
  my $road = Goo::Canvas::Polyline->new(
        $road_group,FALSE,$num_points, .... other options);

[download]

Also note from my example node, that creating a PolyLine with an array_ref is a one shot deal. If you need to update it, your points need to be a Goo::Canvas::Points object, you update the Points object, then set it as the points in the PolyLine.

I'm not really a human, but I play one on earth CandyGram for Mongo

In reply to Re: Drawing Shapefiles in Goo::Canvas by zentara
in thread Drawing Shapefiles in Goo::Canvas by deadpickle

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.