NAME
   Wiki::Toolkit::Plugin::Locator::Grid - A Wiki::Toolkit plugin to manage
   co-ordinate data.

DESCRIPTION
   Access to and calculations using co-ordinate metadata supplied to a
   Wiki::Toolkit wiki when writing a node.

   Note: This is *read-only* access. If you want to write to a node's
   metadata, you need to do it using the "write_node" method of Wiki::Toolkit.

   We assume that the points are located on a flat, square grid with unit
   squares of side 1 metre.