<p dir="ltr">Pierre, <br>
Because of the difficulty in keeping the Canaan area up to date, due to the rapid urbanization. And a number of recent mapping incomplete efforts ARC used imagery from September of this year to complete a full QA/QC of the Canaan area, this included correcting spatial accuracy and updating building footprints. We spent an entire month of staff time performing this QA. The data is essential for a coordinated project we are doing with multiple partners.</p>
<p dir="ltr">Can you confirm the date on the drone imagery? I was told that imagery flown in 2015 was lost due to a malfunction on the OSM-FR servers. Is this imagery available? Please be very mindful of the date flown as even a month can show major changes in the area. </p>
<p dir="ltr">I highly suggest mapping the campeche or onaville areas for the mapathon. Both projects have up to date high quality satellite imagery and are in need of more love than central Canaan at the moment. </p>
<p dir="ltr">As always feel free to reach out to me directly if you have further issues or questions? </p>
<p dir="ltr">Dale</p>
<br><div class="gmail_quote"><div dir="ltr">On Fri, Nov 20, 2015, 1:32 PM Pierre Béland <<a href="mailto:pierzenh@yahoo.fr">pierzenh@yahoo.fr</a>> wrote:<br></div><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><div><div style="color:#000;background-color:#fff;font-family:verdana,helvetica,sans-serif;font-size:13px"><div>Being in Port-au-Prince for a Training session of the Haiti OpenStreetMap community (Espace OSM francophone project), I collaborate this week with the Haiti OSM community who have monitored urbanisation progression in the Canaan sector, providing UAV imagery in 2013, 2014 and 2015 (60% of the zone covered so far). They have also added to osm the building footprints in the area from precise and accurate imagery (4 cm precision).<br></div><div><br></div><div>We organize a mapathon tomorrow to revise the Canaan zone using the November 2015 imagery available and monitor the progress of rapid House contruction in this sector. <br></div><div><br></div><div><div dir="ltr">Planning the work, I see today that one contributor did most of Tak 1238 for Canaan Haiti and it seems deleted systematically buildings before redrawing them. In JOSM if I download buildings and search for newly created buildings (ie version:1), most of the buildings have version=1. </div></div><div><br></div><div>If this is exact, we should note that this is contrary to the OSM philosophy. The rule that we generally follow at OSM to respect previous contributions and keep history, is to revise geometry and not delete / retrace.<br></div><div><br></div><div>For these two changesets alone, I count 50 and 44 ways deleted.</div><div dir="ltr"><a rel="nofollow" href="http://www.openstreetmap.org/changeset/35462043" target="_blank">http://www.openstreetmap.org/changeset/35462043</a><br></div><div dir="ltr"><a rel="nofollow" href="http://www.openstreetmap.org/changeset/35462424" target="_blank">http://www.openstreetmap.org/changeset/35462424</a><br></div><div><br><span></span></div><div>At the same time, many buildings are missing. Since I have no comparizon with the situation before this mapping, It is hard to say what was done exactly, if any building were erased and not replaced.</div><div><br><span></span></div>Could somebody confirm that buildings were systematically deleted before retracing. What should we do to correct rapidly this situation before we start the mapathon tomorrow?<br> <div><span style="font-style:italic;color:rgb(0,0,191);font-weight:bold"> <br><font face="garamond, new york, times, serif">Pierre </font><br></span></div></div></div></div></div></div>_______________________________________________<br>
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