 easier to find the right vectors or regions by
exploring the layout and hierarchy of Census data. This is especially
true when we are not sure of what information is available or are not
sure where to start. Finding the right Census geographic code on a map
will be easier for some than using named search. This is also handy if
we want to assemble a custom aggregation of region codes at different
hierarchies.</p>
<p>To facilitate this, we have included a couple of convenience
functions that take you directl