probability density that an elephant was found at a given
location within the year and the two layers contain data for the two
individual elephants. Utilization distributions were generated using the
<code>adehabitatHR</code> package from GPS tracking data. W. Kilian, W.M. Getz, R.
Zidon, and M. Tsalyuk graciously provided permission to use their data for
visualization purposes.</p>
    </div>

    <div id="ref-usage">
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="va">elepha