lementations">Other implementations<a class="anchor" aria-label="anchor" href="#other-implementations"></a>
</h2>
<p>The <code>tongfen</code> package is open to add extensions for other specialized data sources, as well as extensions of existing ones.</p>
</div>
<div class="section level2">
<h2 id="fixed-target-geography-estimation">Fixed target geography estimation<a class="anchor" aria-label="anchor" href="#fixed-target-geography-estimation"></a>
</h2>
<p>When geographies aren’t sufficiently congruent o