Update 0.5 docs

0.5/format/index.html

@@ -136,6 +136,7 @@
                 <li class="third-level"><a href="#parameters">Parameters</a></li>
                 <li class="third-level"><a href="#products">Products</a></li>
                 <li class="third-level"><a href="#processing-plants">Processing plants</a></li>
+                <li class="third-level"><a href="#geographic-database">Geographic database</a></li>
                 <li class="third-level"><a href="#current-limitations">Current limitations</a></li>
             <li class="second-level"><a href="#output-data-format-json">Output Data Format (JSON)</a></li>
                 
@@ -436,6 +437,50 @@
     }
 }
 </code></pre>
+<h3 id="geographic-database">Geographic database</h3>
+<p>Instead of specifying locations using latitudes and longitudes, it is also possible to specify them using unique identifiers, such as the name of a US state, or the county FIPS code. This works anywhere <code>latitude (deg)</code> and <code>longitude (deg)</code> are expected. For example, instead of:</p>
+<pre><code class="language-json">{
+    &quot;initial amounts&quot;: {
+        &quot;C1&quot;: {
+            &quot;latitude (deg)&quot;: 37.27182,
+            &quot;longitude (deg)&quot;: -119.2704,
+            &quot;amount (tonne)&quot;: [934.56, 934.56]
+        },
+    }
+}
+</code></pre>
+<p>is is possible to write:</p>
+<pre><code class="language-json">{
+    &quot;initial amounts&quot;: {
+        &quot;C1&quot;: {
+            &quot;location&quot;: &quot;us-state:CA&quot;,
+            &quot;amount (tonne)&quot;: [934.56, 934.56]
+        },
+    }
+}
+</code></pre>
+<p>Location names follow the format <code>db:id</code>, where <code>db</code> is the name of the database and <code>id</code> is the identifier for a specific location. RELOG currently includes the following databases:</p>
+<table>
+<thead>
+<tr>
+<th>Database</th>
+<th>Description</th>
+<th>Examples</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td><code>us-state</code></td>
+<td>List of states of the United States.</td>
+<td><code>us-state:IL</code> (State of Illinois)</td>
+</tr>
+<tr>
+<td><code>2018-us-county</code></td>
+<td>List of United States counties, as of 2018. IDs are 5-digit FIPS codes.</td>
+<td><code>2018-us-county:17043</code> (DuPage county in Illinois)</td>
+</tr>
+</tbody>
+</table>
 <h3 id="current-limitations">Current limitations</h3>
 <ul>
 <li>Each plant can only be opened exactly once. After open, the plant remains open until the end of the simulation.</li>