<div dir="ltr"><div><div><div>Thanks Pierre for this heads up on this two days workshop that sounded really interesting. <br></div>Excellent day to all,<br><br></div>Best, <br></div>Nicolas<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Nov 3, 2015 at 10:43 AM, Pierre Béland <span dir="ltr"><<a href="mailto:pierzenh@yahoo.fr" target="_blank">pierzenh@yahoo.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:#000;background-color:#fff;font-family:verdana,helvetica,sans-serif;font-size:13px"><div dir="ltr">#DigiRevCMI New Information Technology Tools in 21st Century Politics</div><div dir="ltr"><a href="http://www.cmi.no/news/?1585-digital-revolutions" target="_blank">http://www.cmi.no/news/?1585-digital-revolutions</a></div><div dir="ltr"><br></div><div dir="ltr">My presention yesterday was the opportunity to review that last major OpenSteetMap / HOT Responses in the context of disaster and to show the various management aspects of such interventions plus quality problems / management in the context of such responses.</div><div dir="ltr"><a href="https://twitter.com/pierzen/status/661120335845138432" target="_blank">https://twitter.com/pierzen/status/661120335845138432</a><br></div><div><br></div><div dir="ltr">I presented briefly the Semantic analysis I started of the 2015 Nepal response. Looking at the OSM Planet File for 2015-04-24 (before the Response) and 2015-06-07 (After the response), I measured how the objects are related to OSM features. This important measure of quality, completes other quality measures of OSM data. It also gives us a global measure of quality, and can help us monitor the progression of the crowdsource effort and detect rapidly some tagging problems. The first step is to relate parents / childs (ie. relation, way, node) and find the tags that describe each OSM Feature.<br></div><div><br></div><div dir="ltr">Either before or after the Nepal Response, only 1% of the objects cannot be related to a feature such as highway, building, amenity, etc. No key / value combination listed on the OSM Map Features wiki page (plus specific HOT disaster keys). A 1% error shows a high ontologic precision of the data produced. Data with no feature, is Invisible data. Either, there was syntax error in the key / value, no tag, or a contributor simply added a name or note. We need to look more closely at such patterns and find ways to correct them rapidly.</div><div dir="ltr"><br></div><div dir="ltr">To show how we can focus on this "Invisible Data" and cure it, I created the JOSM NoFeature Mappaint style. It can be selected from the JOSM Mappaint Preferences. <a href="https://josm.openstreetmap.de/wiki/Styles/NoFeature" target="_blank">https://josm.openstreetmap.de/wiki/Styles/NoFeature</a>. This Style shows the key-value combinations I selected for my OSM data analysis. I invite HOT Validators to use this style and test it while validating data.<br></div><div dir="ltr"><br></div><div>We also have access to dynamic data (ie data created, modified, deleted). I will analyze more in detail and try to identify patterns. Monitoring semantic quality of data produced can help to correct rapidly, revise instructions, etc.<br></div><div><br></div><div dir="ltr">This two day workshop is a great opportunity to discuss with other Digital Humanitarian Network contributors and thanks to Per Aarvik from SBTF and Bergen Universiy who organized this workshop.<span class="HOEnZb"><font color="#888888"><br></font></span></div><span class="HOEnZb"><font color="#888888"> <br><div><span style="font-style:italic;color:rgb(0,0,191);font-weight:bold"><font face="garamond, new york, times, serif">Pierre </font><br></span></div></font></span></div></div><br>_______________________________________________<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr">Nicolas Chavent<div>Projet OpenStreetMap (OSM)<br>Projet Humanitarian OpenStreetMap Team (HOT)<br></div><div>Projet Espace OSM Francophone (EOF)<br></div><div><div>Mobile (FRA): +33 (0)6 52 40 78 20<br></div><div>Mobile (CIV): +225 78 12 76 99<br></div><div><a href="mailto:nicolas.chavent@hotosm.org" target="_blank"></a></div><div>Email: <a href="mailto:nicolas.chavent@gmail.com" target="_blank">nicolas.chavent@gmail.com</a><br>Skype: c_nicolas<br>Twitter: nicolas_chavent<br></div></div></div></div></div></div>
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