r map addressing:
</p>

<ul>
<li>
you can always check locations for identity, as noted above
</li>
<li>
each location tells its Neighbors and Distance5Area
</li>
<li>
sprawls, as described in the next section
</li>
<li>
relative coordinates, which are tilt as the grid
</li>
</ul>

<h4>Relative coordinates:</h4>

<p>
Relative coordinates always relate to a base tile, which can be chosen freely. Such a coordinate is a pair of
two components, <i>a</i> and <i>b</i>, which both count the distance to the base ti