in the environmental variable <code>"MAPQUEST_API_KEY"</code>.</p></li>
<li><p><code>"bing"</code>: <a href="https://learn.microsoft.com/en-us/bingmaps/rest-services/locations/" class="external-link">Bing</a>.  Batch geocoding is supported, but must be explicitly called with <code>mode = "batch"</code>. Store an API key in the environmental variable <code>"BINGMAPS_API_KEY"</code>.</p></li>
<li><p><code>"geoapify"</code>: <a href="https://www.geoapify.com/geocoding-api" class="external-link">Geoapify</a>.  