Re: [R] polygon shapefile from line edge coordinate list

2008-03-08 Thread Roger Bivand
Murray Richardson utoronto.ca> writes: > > Hello, > > I am looking for advice on a task I am trying to complete. > > I have a 4 column dataframe defining the start and end coordinates of > line edges (from a CGAL alpha shapes function to define concave hulls > from point clusters). I would

[R] polygon shapefile from line edge coordinate list

2008-03-07 Thread Murray Richardson
Hello, I am looking for advice on a task I am trying to complete. I have a 4 column dataframe defining the start and end coordinates of line edges (from a CGAL alpha shapes function to define concave hulls from point clusters). I would like to create polygon shapefiles from these line edges,