Alpha shapes with R and lattice

#Alpha-shapes with #R and lattice | (R news & tutorials)
▻http://www.r-bloggers.com/alpha-shapes-with-r-and-lattice

A package called alphahull includes functions for computing alpha shapes and hulls in R.

http://procomun.files.wordpress.com/2011/04/example.png?w=300&h=300

Working with Spatial Data
▻http://casoilresource.lawr.ucdavis.edu/drupal/book/export/html/519

A collection of notes, examples, references, and thoughts on working with spatial data.

http://casoilresource.lawr.ucdavis.edu/drupal/files/images/polys-1.png