<div dir="ltr">Dear All,<div>I wrote up some ideas. It proved more difficult than I thought and I am not sure I captured the issue at the core of the discussion -</div><div>How to deal with the lowest level of the event hierarchy</div><div><br></div><div>Below is the text but it is also at the bottom of our document here</div><div><a href="https://docs.google.com/document/d/1r_XMEgB7p7OI7a5Ouq6G9oa7LmQFPcFhZZCLD9gWOIE/edit">https://docs.google.com/document/d/1r_XMEgB7p7OI7a5Ouq6G9oa7LmQFPcFhZZCLD9gWOIE/edit</a><br></div><div><br></div><div><p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif"> </p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif">Currently the vast majority of records in the GBIF archive contain
an observation of one or more individuals of a single taxon. Many additional fields
in the record, based on the Darwin Core, provide context for the observation including
the observation type, the time and place of observation, the observer, etc. At the present time, however, the metadata do not
provide context about whether or not an observation is part of a systematic set
of observations, herein called a survey. A survey is an approach based on the
idea of statistical sampling, whereby an observer is unable to measure an entire
population but instead focuses on a subset of the population to make inferences
about the entire population.</p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif"> </p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif">The added scientific value of the survey framework, over
just a collection of unrelate observations indicating present only, is that a
scientist can make inferences about how common or rare a taxon might be (its status)
and over time, measure trends. The basic idea of a survey is intuitive: the
more you look, the more you will find. In the fisheries literature this idea is
called “catch per unit effort”.</p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif"> </p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif">The goal of the Humboldt extension is to accurately describe
a survey and its often hierarchical nature. Whereas an observation record is
characterized by general sense of the observation approach (Basis of Record), a
time and a location, a survey has a much more detailed description of the observation
technique(s), and also includes the number of sampling units employed, a time
or time interval (start time and duration), and a measure of the spatial extent
over which the survey was conducted. </p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif"> </p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif">A sampling unit, the finest measurement resolution of a
survey, encompasses a variety of ways of looking for species. It might include: </p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif"> </p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif">A physical sample such as a leaf or a water sample containing
molecules of DNA</p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif">One or several sweeps of a net containing a collection of
insects</p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif">Camera trap – collection of images of mammals</p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif">Quadrat – estimating
the percentage of space or numbers of space occupying organisms such as plants
or clams</p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif">Bird checklist – list of species of birds observed from a
fixed-point </p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif"> </p>
<p class="MsoNormal" style="margin:0in;font-size:12pt;font-family:Calibri,sans-serif">Special considerations arise at the sampling unit level.
First a measurement can detect no individuals or space occupied. In these cases
the data need to reflect this fact with recording 0 for the observation. Second a measurement
might be more than just a number or percentage.
It might a be compound structure that includes the flowering stage of
each plant in a quadrat or the length and body mass of each insect in the sweep
net sample or the location of each bird along a transect. </p></div><div><br></div><div><br></div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jul 5, 2023 at 8:08 AM Dmitry Schigel <<a href="mailto:dschigel@gbif.org">dschigel@gbif.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg-5711228756550278214">
<div lang="EN-US" style="overflow-wrap: break-word;">
<div class="m_-5711228756550278214WordSection1">
<p class="MsoNormal">Stuck in a GBIF meeting, not joining today<u></u><u></u></p>
<p class="MsoNormal">DS<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal"><b>From:</b> tdwg-humboldt <<a href="mailto:tdwg-humboldt-bounces@lists.tdwg.org" target="_blank">tdwg-humboldt-bounces@lists.tdwg.org</a>>
<b>On Behalf Of </b>John Wieczorek<br>
<b>Sent:</b> Tuesday, 4 July, 2023 21:30<br>
<b>To:</b> Humboldt Core TG <<a href="mailto:tdwg-humboldt@lists.tdwg.org" target="_blank">tdwg-humboldt@lists.tdwg.org</a>><br>
<b>Cc:</b> <a href="mailto:wmh6@cornell.edu" target="_blank">wmh6@cornell.edu</a><br>
<b>Subject:</b> Re: [tdwg-humboldt] meeting this week<u></u><u></u></p>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">Hi folks,<u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">I am giving the second module of a course on georeferencing tomorrow throughout the time of the Task Group call. I haven't mastered the two places at once thing, unfortunately.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Cheers,<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">John<u></u><u></u></p>
</div>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<div>
<p class="MsoNormal">On Tue, Jul 4, 2023 at 4:27 PM ys628 <<a href="mailto:yanina.sica@yale.edu" target="_blank">yanina.sica@yale.edu</a>> wrote:<u></u><u></u></p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<div>
<p class="MsoNormal"><span style="font-size:12pt;color:black">Hi all,<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12pt;color:black"><u></u> <u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12pt;color:black">Lets discuss the<a href="https://docs.google.com/document/d/1r_XMEgB7p7OI7a5Ouq6G9oa7LmQFPcFhZZCLD9gWOIE/edit" title="https://docs.google.com/document/d/1r_XMEgB7p7OI7a5Ouq6G9oa7LmQFPcFhZZCLD9gWOIE/edit" target="_blank">
Hierarchical Document </a>this week!<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12pt;color:black"><u></u> <u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12pt;color:black">With the TDWG 2023 rush, people might not have had time to review or work on it. If that is the case, we can have a rather short meeting to agree on the next steps.<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12pt;color:black"><u></u> <u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12pt;color:black">See you!<u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12pt;color:black"><u></u> <u></u></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:12pt;color:black">Yani<u></u><u></u></span></p>
</div>
<div>
<div style="margin-top:12pt;margin-bottom:12pt;min-width:424px" id="m_-5711228756550278214m_-528839154823401191LPBorder_GTaHR0cHM6Ly9kb2NzLmdvb2dsZS5jb20vZG9jdW1lbnQvZC8xcl9YTUVnQjdwN09JN2E1T3VxNkc5b2E3TG1RRlBjRmhaWkNMRDlnV09JRS9lZGl0">
<table border="1" cellspacing="3" cellpadding="0" width="100%" style="width:100%;border:1pt solid rgb(200,200,200)">
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<div style="margin-right:9pt;overflow:hidden" id="m_-5711228756550278214m_-528839154823401191LPImageContainer517284">
<p class="MsoNormal"><a href="https://docs.google.com/document/d/1r_XMEgB7p7OI7a5Ouq6G9oa7LmQFPcFhZZCLD9gWOIE/edit" target="_blank"><span style="text-decoration:none"><img border="0" width="240" height="126" style="width: 2.5in; height: 1.3166in;" id="m_-5711228756550278214_x0000_i1025" src="https://lh3.googleusercontent.com/docs/ADP-6oHMdd4mw25hw7lvSXn4ZCiwspb9cc28UTsyFyihNFS6S59uu9rmVwTYgSg5aGvPEZyQo0fqEladdZ4o63Oh0mCa2zF5ZABb59fPXQzqpB8n=w1200-h630-p"></span></a><u></u><u></u></p>
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<td width="100%" valign="top" style="width:100%;border:none;padding:9pt 27pt 9pt 9pt">
<div style="margin-right:6pt;margin-bottom:9pt" id="m_-5711228756550278214m_-528839154823401191LPTitle517284">
<p class="MsoNormal"><span style="font-size:16pt;font-family:"Segoe UI Light",sans-serif"><a href="https://docs.google.com/document/d/1r_XMEgB7p7OI7a5Ouq6G9oa7LmQFPcFhZZCLD9gWOIE/edit" target="_blank"><span style="text-decoration:none">Hierarchical Events
in Humboldt Extension for ecological inventories</span></a><u></u><u></u></span></p>
</div>
<div style="margin-right:6pt;margin-bottom:9pt;max-height:100px;overflow:hidden" id="m_-5711228756550278214m_-528839154823401191LPDescription517284">
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Segoe UI",sans-serif;color:rgb(102,102,102)">Properties of hierarchical Events in Humboldt Extension for ecological inventories Title: Properties of hierarchical Events in Humboldt Extension for ecological
inventories Date version issued: 2023-xx-xx Date created: 2023-xx-xx Part of TDWG Standard:
<a href="http://www.tdwg.org/standards/450" target="_blank">http://www.tdwg.org/standards/450</a> This ...<u></u><u></u></span></p>
</div>
<div id="m_-5711228756550278214m_-528839154823401191LPMetadata517284">
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Segoe UI",sans-serif;color:rgb(166,166,166)"><a href="http://docs.google.com" target="_blank">docs.google.com</a><u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:12pt;color:black"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span style="font-size:12pt;color:black"><u></u> <u></u></span></p>
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<div id="m_-5711228756550278214m_-528839154823401191Signature">
<div>
<div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:rgb(68,68,68);background:white">Yanina V. Sica, PhD</span><span style="font-size:11.5pt;color:rgb(32,31,30)"><u></u><u></u></span></p>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:rgb(68,68,68)">Lead Data Team</span><span style="font-size:12pt;font-family:Arial,sans-serif;color:rgb(34,34,34)"><u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(68,68,68)"><a href="https://mol.org/" title="https://mol.org/" target="_blank">Map of Life</a> | <a href="https://bgc.yale.edu/" title="https://bgc.yale.edu/" target="_blank">Center
for Biodiversity and Global Change</a></span><span style="font-size:12pt;font-family:Arial,sans-serif;color:rgb(34,34,34)"><u></u><u></u></span></p>
</div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:rgb(68,68,68)">Yale University</span><span style="font-size:12pt;font-family:Arial,sans-serif;color:rgb(34,34,34)"><u></u><u></u></span></p>
</div>
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<div>
<p class="MsoNormal" style="background:white"><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:rgb(68,68,68);background:white">pronouns: she/her/hers</span><span style="font-size:11.5pt;color:rgb(32,31,30)"><u></u><u></u></span></p>
</div>
<p class="MsoNormal"><i><span style="font-size:7.5pt;font-family:Arial,sans-serif;color:rgb(68,68,68);background:white">If you are receiving this email outside of your working hours, I am not expecting you to read or respond.</span></i><span style="font-size:12pt;color:black"><u></u><u></u></span></p>
</div>
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<p class="MsoNormal">_______________________________________________<br>
tdwg-humboldt mailing list<br>
<a href="mailto:tdwg-humboldt@lists.tdwg.org" target="_blank">tdwg-humboldt@lists.tdwg.org</a><br>
<a href="https://lists.tdwg.org/mailman/listinfo/tdwg-humboldt" target="_blank">https://lists.tdwg.org/mailman/listinfo/tdwg-humboldt</a><u></u><u></u></p>
</div>
</blockquote>
</div>
</div>
</div>
_______________________________________________<br>
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<a href="mailto:tdwg-humboldt@lists.tdwg.org" target="_blank">tdwg-humboldt@lists.tdwg.org</a><br>
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</div></blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr">Robert D Stevenson<br>Associate Professor<div>Department of Biology<br>UMass Boston</div></div></div>