ndmarks</h1>
      <small class="dont-index">Source: <a href="https://github.com/nepem-ufsc/pliman/blob/HEAD/R/utils_landmarks.R" class="external-link"><code>R/utils_landmarks.R</code></a></small>
      <div class="d-none name"><code>calibrate.Rd</code></div>
    </div>

    <div class="ref-description section level2">
    <p>Calibrating the actual size is possible if any interlandmark distance on the
image is known. calibrate() can be used to determine the size of a known
distance (cm) on the graph. I invi