Removing unwanted nodes

[Melissa Cowoski]

I want to be able to define the vectors as areas.  I'm not sure how to do
that if each of the areas is made up of multiple lines.  Also, I have
nodes in my data that do not mark the intersection of two polygons.

for example

  N*********N**********N***********N
  *  veg1   *       veg2           *
  *         *                      *
  N*********N****************N*****N

N=nodes

The nodes seem somewhat random.  

Thanks,

Melissa Cowoski
Stanford University
cowoski at pangea.stanford.edu