<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span id="gmail-docs-internal-guid-90c9e94e-7fff-831a-7a6d-76557504e770"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Hi Antidius and team,</span></p><br><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Thanks for opening up communications about the data import intended for Tanga and for sharing the link to the wiki page with the workflow. I'm also adding a few other people to this email chain.</span></p><br><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">I have downloaded and checked the </span><a href="https://drive.google.com/file/d/1zzuKwMvZCK6_J-_HK8k2eH9KkaADyUrW/view?usp=sharing" style="text-decoration-line:none"><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;text-decoration-line:underline;vertical-align:baseline;white-space:pre-wrap">Tanga buildings data</span></a><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">, this generally looks good and I’d like to congratulate everyone involved in the digitization process however a few things stood out to me;</span></p><br><ul style="margin-top:0px;margin-bottom:0px"><li dir="ltr" style="list-style-type:disc;font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">The use of 2019 imagery seems to be off for digitization as 2 years of difference can present outdated data that allows lots of differences with the current situation. Correct me if I’m wrong but I understand that ARU/dLab has access to 2021 drone imagery of Tanga which seems to be perfectly up to date for this work. Did you consider this option?</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">The data doesn’t show differentiation between “complete buildings” and “incomplete/unfinished buildings” even though the difference can clearly be visible (at least with the Bing imagery I have used). This is of interest for data users to understand and make considerations.</span></p></li></ul><br><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Now coming to the OSM data import, this is usually a complex process as it needs to be properly conducted and reviewed with the assistance of more technically oriented and experienced OSM editors to avoid data quality issues and conflicts while keeping the OSM data at its best state. Reading through the </span><a href="https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import" style="text-decoration-line:none"><span style="font-size:11pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;text-decoration-line:underline;vertical-align:baseline;white-space:pre-wrap">Tanga wiki page</span></a><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> you established, here’s are a few (not all) comments;</span></p><ul style="margin-top:0px;margin-bottom:0px"><li dir="ltr" style="list-style-type:disc;font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">There’s no clarity on the workflow between the building data you already created and the methodology to have this data in OSM. While the </span><a href="https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import#Import_Type" style="text-decoration-line:none"><span style="font-size:11pt;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;text-decoration-line:underline;vertical-align:baseline;white-space:pre-wrap">import type</span></a><span style="font-size:11pt;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> section talks about how the </span><span style="font-size:11pt;background-color:transparent;font-weight:700;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">community </span><span style="font-size:11pt;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">will use the </span><span style="font-size:11pt;background-color:transparent;font-weight:700;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">HOT tasking manager</span><span style="font-size:11pt;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> to import this data to OSM, the </span><a href="https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import#Team_Approach" style="text-decoration-line:none"><span style="font-size:11pt;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;text-decoration-line:underline;vertical-align:baseline;white-space:pre-wrap">team approach</span></a><span style="font-size:11pt;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> section suggests that “</span><span style="font-size:10.5pt;color:rgb(32,33,34);font-style:italic;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">data import will be conducted by the <b>University experienced OSM mappers</b> through existing OSM project accounts (Living_Lab_Initiative)</span><span style="font-size:10.5pt;color:rgb(32,33,34);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">”. As this contradicts itself, does this data import neglect the broader OSM community and its contribution? Do the intended university students have (enough) experience with large-scale imports like this?</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">The use of HOT tasking manager as suggested isn’t quite captured in the “</span><span style="font-size:11pt;background-color:transparent;font-style:italic;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">workflow</span><span style="font-size:11pt;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">” section. This part only mentions JOSM, OpenData plugin, ToDo plugin, and OSM only as the tools/platforms to be used for this import. This worries me whether there's a clear and understandable workflow to be used for this.</span></p></li><li dir="ltr" style="list-style-type:disc;font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">QA plans are not quite well established to ensure the good quality of the data. The wiki suggests that “</span><span style="font-size:10.5pt;color:rgb(32,33,34);font-style:italic;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Validation of the import will be done by a second user in the Tasking Manager”</span><span style="font-size:10.5pt;color:rgb(32,33,34);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">. Who is this second user? Is it global OSM contributors? Of what mapping level? Can they be trusted with QA? etc. </span></p></li></ul><p dir="ltr" style="line-height:1.38;margin-left:36pt;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10.5pt;font-family:Arial;color:rgb(32,33,34);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">OSM guidelines suggest that </span><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">“</span><span style="font-size:10.5pt;font-family:Arial;color:rgb(32,33,34);font-style:italic;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Take great care to avoid damaging the database and don't leave a messy import and assume that nameless OpenStreetMap contributors working in </span><a href="https://wiki.openstreetmap.org/wiki/ID" style="text-decoration-line:none"><span style="font-size:10.5pt;font-family:Arial;color:rgb(6,69,173);font-style:italic;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">iD</span></a><span style="font-size:10.5pt;font-family:Arial;color:rgb(32,33,34);font-style:italic;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> and </span><a href="https://wiki.openstreetmap.org/wiki/Potlatch" style="text-decoration-line:none"><span style="font-size:10.5pt;font-family:Arial;color:rgb(6,69,173);font-style:italic;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Potlatch</span></a><span style="font-size:10.5pt;font-family:Arial;color:rgb(32,33,34);font-style:italic;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> will tirelessly complete your work. JOSM is better at untangling messy data, but it's still difficult and you should do this work yourself if necessary.” </span><span style="font-size:10.5pt;font-family:Arial;color:rgb(32,33,34);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Of all things, QA should be given high priority to ensure good data.</span></p><ul style="margin-top:0px;margin-bottom:0px"><li dir="ltr" style="list-style-type:disc;font-size:10.5pt;font-family:Arial;color:rgb(32,33,34);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10.5pt;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Last but not least, this import should be registered in the </span><a href="https://wiki.openstreetmap.org/wiki/Import/Catalogue" style="text-decoration-line:none"><span style="font-size:10.5pt;font-variant-numeric:normal;font-variant-east-asian:normal;text-decoration-line:underline;vertical-align:baseline;white-space:pre-wrap">import catalogue</span></a><span style="font-size:10.5pt;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> as it is missing there right now.</span></p></li></ul><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10.5pt;font-family:Arial;color:rgb(32,33,34);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"><br></span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10.5pt;font-family:Arial;color:rgb(32,33,34);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">My honest opinion is that this import is not quite ready to be executed with the plan that is in place. The data is quite good and of decent quality but the process does not ensure keeping OSM without risking the data quality in the database. I'd appreciate hearing more thoughts from you and the mailing list members.</span></p><br><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10.5pt;font-family:Arial;color:rgb(32,33,34);font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Thanks and regards,</span></p></span></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div style="font-size:12.8px"><div style="font-size:12.8px"><font color="#666666" face="arial, helvetica, sans-serif"><b>----</b></font></div><div style="font-size:12.8px"><font color="#666666" face="arial, helvetica, sans-serif"><b>Innocent,</b></font></div><div style="font-size:12.8px"><font face="arial, helvetica, sans-serif" color="#666666">Phone: <b>+255 714 166 665</b><span style="font-size:12.8px"> (Call & WhatsApp).</span></font></div><div style="color:rgb(136,136,136);font-size:12.8px"><font face="arial, helvetica, sans-serif"></font></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jun 2, 2021 at 9:08 PM Antidius Kawamala <<a href="mailto:antidius@dlab.or.tz">antidius@dlab.or.tz</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">




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Hello community,
<div>The subject of this message is to inform the OSM community in Tanzania</div>
<div>of an import prepared by Living lab initiative as part of a project to scale up the Open Street Mapping project,Missing Maps Initiative by combining data obtained from manual digitization from the latest satelite image 2019 In Tanga City.</div>
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<div>This import consists of more than 500 hundred thousand footprints of buildings located in all over the Tanga region.</div>
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<div>A wiki page with details of the proposed import is available</div>
<div>here:<a href="https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import" title="https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import" target="_blank"> https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import</a></div>
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<div>Experienced OSM contributors who would be interested in participating in</div>
<div>this import will be welcome.</div>
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<div>A similar message regarding this import will also be shared on the OSM</div>
<div>mailing list,HOT and WhatsApp group for OSM Tanzania after posting to the wiki to gather a maximum feedback.</div>
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<div>Don't hesitate to share your comments, questions, or problems</div>
related to this import before it begins.<br>
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Regards</div>
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<b style="color:rgb(81,167,249);font-family:inherit;font-size:12pt;font-style:inherit;font-variant-ligatures:inherit;font-variant-caps:inherit">Antidius Kawamala</b><br>
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<div><span><span style="color:rgb(51,51,51);font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt"><b>GIS Specialist and </b></span><span><font color="#51a7f9" face="Calibri, Arial, Helvetica, sans-serif"><span style="color:rgb(51,51,51);font-size:12pt"><b>Researcher
 (dLab)</b></span></font></span></span></div>
<div><span><font color="#51a7f9" face="Calibri, Arial, Helvetica, sans-serif"><span style="color:rgb(51,51,51);font-size:12pt"><b>M: +255769806836</b></span></font></span></div>
<div><span><font color="#51a7f9" face="Calibri, Arial, Helvetica, sans-serif"><span style="color:rgb(51,51,51);font-size:12pt"><b>Founder of </b></span><span style="color:rgb(51,51,51)"><b><a href="https://rootgis.wordpress.com/" title="https://rootgis.wordpress.com/" target="_blank"><span style="font-size:12pt">RootGIS</span></a></b></span></font></span></div>
<div><span><font color="#51a7f9" face="Calibri, Arial, Helvetica, sans-serif"><i><span style="color:rgb(81,167,249);font-size:12pt"><b>Skype:
</b></span><span style="color:rgb(51,51,51);font-size:12pt"><b>Antidius Kawamala |
</b></span><span style="color:rgb(81,167,249);font-size:12pt"><b>Twitter:</b></span><span style="color:rgb(51,51,51);font-size:12pt"><b> @Antidius36</b></span></i></font></span></div>
<div><font color="#333333" face="Calibri, Arial, Helvetica, sans-serif"><span style="font-size:12pt"><b>P.O. Box 33335 Dar es Salaam, Tanzania | College of ICT, UDSM- Kijitonyama campus | </b></span><b><a href="https://dlab.or.tz/" title="https://dlab.or.tz/" target="_blank"><span style="font-size:12pt">dLab
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_______________________________________________<br>
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