tiple ranges on top of environmental layers</p>
    </div>

    <pre class="usage"><span class='fu'>plot_ranges</span><span class='op'>(</span><span class='va'>sp_ranges</span>, sp_records <span class='op'>=</span> <span class='cn'>NULL</span>, <span class='va'>variable</span>, range_colors <span class='op'>=</span> <span class='cn'>NULL</span>,
            color_variable <span class='op'>=</span> <span class='cn'>NULL</span>, xlim <span class='op'>=</span> <span class='cn'>NULL</span>, ylim <span class='op