Data from: Multi-image flock size estimation with CountEm: A case study with half a million Common Eiders and Greater Snow Geese.

<p>The present data set is related to the manuscript &quot;Multi-image flock size estimation with CountEm: A case study with half a million Common Eiders and Greater Snow Geese&quot; submitted to the Ecosphere journal.</p> <p>The files COEI_data.csv and GSGO_data.csv contain data and results of the 179 COEI and 99 GSGO ECA Flocks images respectively. The files have one row per image. Both files have 9 columns corresponding to the following variables:</p> <ul> <li>&nbsp; &ldquo;Filenumber&rdquo; is used to identify the number of the corresponding image, namely &ldquo;001&rdquo; to &ldquo;099&rdquo; for GSGO, and &ldquo;001&rdquo; to &ldquo;179&rdquo; for COEI.</li> <li> &ldquo;N&rdquo;: Total number of annotated birds in the image.</li> <li> &ldquo;Nest&rdquo;: Bird number estimation (bN 439 ) obtained with a single real mode CountEm run.</li> <li> &ldquo;CE_sim&rdquo;: Empirical coefficient of error (relative standard error, CEe(bN 440 )) obtained from 2000 simulated measurements in simulation mode.</li> <li> &ldquo;f&rdquo;: Sampling fraction used in the real mode CountEm run.</li> <li>&ldquo;n0&rdquo;: Initial number of quadrats used in the real mode CountEm run.</li> <li>&ldquo;Q&rdquo;: Total number of birds (i.e. sample size) counted in the real mode CountEm estimation.</li> <li>&nbsp;&ldquo;n&rdquo;: Number of non-empty quadrats counted in the real mode CountEm estimation.</li> <li>&nbsp;&ldquo;UserTime&rdquo;: Counting time (in minutes) in the real mode CountEm estimation.</li> <li> &ldquo;ManualTime&rdquo;: Counting time (in minutes) of the manual annotation process with ImageJ.</li> </ul>