u can run
<code>set_pliman_viewer("mapview")</code> to set the viewer option to "mapview" for
all functions.</p></dd>

</dl></div>
    <div class="section level2">
    <h2 id="value">Value<a class="anchor" aria-label="anchor" href="#value"></a></h2>
    <p>A numeric (<code>double</code>) scalar value indicating the scale (in pixels per
unit of known distance).</p>
    </div>
    <div class="section level2">
    <h2 id="references">References<a class="anchor" aria-label="anchor" href="#references"></a></h2>
