re is
represented in a contiguous unit of dispersible habitat. These constraints
are a more advanced version of those implemented in the
<code><a href="add_contiguity_constraints.html">add_contiguity_constraints()</a></code> function, because they ensure that
each feature is represented in a contiguous unit and not that the entire
solution should form a contiguous unit. Additionally, this function
can use data showing the distribution of dispersible habitat for each
feature to ensure that all features can d