diff --git a/documentation/builtin_borders.html b/documentation/builtin_borders.html
index dfe4f36..9133f73 100644
--- a/documentation/builtin_borders.html
+++ b/documentation/builtin_borders.html
@@ -84,7 +84,7 @@
 
       <div class='twelve wide column'>
         <h1>Borders Plugin</h1>
-<p>The <code>borders</code> plugin renders the borders around (and between) countries. It uses TopoJSON data published to <code>planet.plugins.topojson.world</code> by the <a href="/documentation/builtin_topojson.html">TopoJSON plugin</a>.</p>
+<p>The <code>borders</code> plugin renders the borders around (and between) countries. It uses TopoJSON data published to <code>planet.plugins.topojson.world</code> by the <a href="/documentation/builtin_topojson.html">TopoJSON plugin</a>. It uses the feature at <code>objects.countries</code> in the TopoJSON object to calculate the borders.</p>
 <h2>API</h2>
 <p><strong><code>planetaryjs.plugins.borders([config])</code></strong></p>
 <p>Valid keys for <code>config</code> are:</p>
diff --git a/documentation/builtin_land.html b/documentation/builtin_land.html
index e8f46c0..85b9c25 100644
--- a/documentation/builtin_land.html
+++ b/documentation/builtin_land.html
@@ -84,7 +84,7 @@
 
       <div class='twelve wide column'>
         <h1>Land Plugin</h1>
-<p>The <code>land</code> plugin renders Earth&#39;s landmasses. It uses TopoJSON data published to <code>planet.plugins.topojson.world</code> by the <a href="/documentation/builtin_topojson.html">TopoJSON plugin</a>.</p>
+<p>The <code>land</code> plugin renders Earth&#39;s landmasses. It uses TopoJSON data published to <code>planet.plugins.topojson.world</code> by the <a href="/documentation/builtin_topojson.html">TopoJSON plugin</a>. It uses the feature at <code>objects.land</code> in the TopoJSON object.</p>
 <h2>API</h2>
 <p><strong><code>planetaryjs.plugins.land([config])</code></strong></p>
 <p>Valid keys for <code>config</code> are:</p>