<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Great, thanks Rafael to reminding us.</div>
<div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div id="Signature">
<div>
<div></div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)">
<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>
</div>
<div style="">
<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 style=""><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 style=""><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 style=""><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/"><span style="font-size:12pt">RootGIS</span></a></b></span></font></span></div>
<div><span style=""><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/"><span style="font-size:12pt">dLab
</span></a></b></font></div>
<blockquote style="margin-top:0; margin-bottom:0">
<blockquote style="margin-top:0; margin-bottom:0">
<blockquote style="margin-top:0; margin-bottom:0">
<blockquote style="margin-top:0; margin-bottom:0">
<div><font color="#333333" face="Calibri, Arial, Helvetica, sans-serif"><img class="EmojiInsert" width="147" height="147" style="max-width:100%; width:147px; height:147px" data-outlook-trace="F:1|T:1" src="cid:3cf1accb-2f6e-49a4-a2ca-b0bf4b8de3ba"><br>
</font></div>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:0; margin-bottom:0">
<blockquote style="margin-top:0; margin-bottom:0">
<div><font color="#333333" face="Calibri, Arial, Helvetica, sans-serif"><br>
</font></div>
</blockquote>
</blockquote>
<div><span style=""><font color="#51a7f9" face="Calibri, Arial, Helvetica, sans-serif"><span style="color:rgb(51,51,51)"><b><br>
</b></span></font></span></div>
</div>
</div>
</div>
</div>
<div id="appendonsend"></div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> talk-tz-request@openstreetmap.org <talk-tz-request@openstreetmap.org><br>
<b>Sent:</b> Saturday, June 12, 2021 2:00 PM<br>
<b>To:</b> talk-tz@openstreetmap.org <talk-tz@openstreetmap.org><br>
<b>Subject:</b> Talk-tz Digest, Vol 22, Issue 5</font>
<div> </div>
</div>
<div class="BodyFragment"><font size="2"><span style="font-size:11pt;">
<div class="PlainText">Send Talk-tz mailing list submissions to<br>
talk-tz@openstreetmap.org<br>
<br>
To subscribe or unsubscribe via the World Wide Web, visit<br>
<a href="https://lists.openstreetmap.org/listinfo/talk-tz">https://lists.openstreetmap.org/listinfo/talk-tz</a><br>
or, via email, send a message with subject or body 'help' to<br>
talk-tz-request@openstreetmap.org<br>
<br>
You can reach the person managing the list at<br>
talk-tz-owner@openstreetmap.org<br>
<br>
When replying, please edit your Subject line so it is more specific<br>
than "Re: Contents of Talk-tz digest..."<br>
<br>
<br>
Today's Topics:<br>
<br>
1. Re: Import of Tanga Building Footprints (Rafael Avila Coya)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Fri, 11 Jun 2021 18:15:49 +0200<br>
From: Rafael Avila Coya <ravilacoya@gmail.com><br>
To: talk-tz@openstreetmap.org<br>
Subject: Re: [Talk-tz] Import of Tanga Building Footprints<br>
Message-ID: <5682c90e-0498-5454-5265-b7be27c90b20@gmail.com><br>
Content-Type: text/plain; charset=utf-8; format=flowed<br>
<br>
Hi, Antidius:<br>
<br>
Thank you very much for your time preparing this import that will <br>
improve the map of Tanzania.<br>
<br>
Just some remarks about the import process, so it gets successfully <br>
passed by the OSM community.<br>
<br>
Before contacting the HOT (or other worldwide) mailing list(s), you <br>
should had had contacted the TZ community, as you do in this email.<br>
<br>
Once the local TZ community is ok with the import, you need (compulsory) <br>
to contact the imports mailing list, to get the final green light for <br>
the import.<br>
<br>
Just in case you haven't yet done it, please read the OSM Import <br>
Guidelines [1]. There you can see you that contacting the local osm <br>
community is step 2, and contacting the imports mailing list is step 5.<br>
<br>
If you have any question/doubt about the import process, just let us <br>
know and we will be happy to assist you.<br>
<br>
Excellent weekend to all,<br>
<br>
Rafael.<br>
<br>
[1] <a href="https://wiki.openstreetmap.org/wiki/Import/Guidelines">https://wiki.openstreetmap.org/wiki/Import/Guidelines</a><br>
<br>
O 11/06/21 ás 05:34, Innocent Maholi via Talk-tz escribiu:<br>
> Hi Antidius and team,<br>
> <br>
> <br>
> Thanks for opening up communications about the data import intended for <br>
> Tanga and for sharing the link to the wiki page with the workflow. I'm <br>
> also adding a few other people to this email chain.<br>
> <br>
> <br>
> I have downloaded and checked the Tanga buildings data <br>
> <<a href="https://drive.google.com/file/d/1zzuKwMvZCK6_J-_HK8k2eH9KkaADyUrW/view?usp=sharing">https://drive.google.com/file/d/1zzuKwMvZCK6_J-_HK8k2eH9KkaADyUrW/view?usp=sharing</a>>,
<br>
> this generally looks good and I’d like to congratulate everyone involved <br>
> in the digitization process however a few things stood out to me;<br>
> <br>
> <br>
> *<br>
> <br>
> The use of 2019 imagery seems to be off for digitization as 2 years<br>
> of difference can present outdated data that allows lots of<br>
> differences with the current situation. Correct me if I’m wrong but<br>
> I understand that ARU/dLab has access to 2021 drone imagery of Tanga<br>
> which seems to be perfectly up to date for this work. Did you<br>
> consider this option?<br>
> <br>
> *<br>
> <br>
> The data doesn’t show differentiation between “complete buildings”<br>
> and “incomplete/unfinished buildings” even though the difference can<br>
> clearly be visible (at least with the Bing imagery I have used).<br>
> This is of interest for data users to understand and make<br>
> considerations.<br>
> <br>
> <br>
> Now coming to the OSM data import, this is usually a complex process as <br>
> it needs to be properly conducted and reviewed with the assistance of <br>
> more technically oriented and experienced OSM editors to avoid data <br>
> quality issues and conflicts while keeping the OSM data at its best <br>
> state. Reading through the Tanga wiki page <br>
> <<a href="https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import">https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import</a>>you established,
<br>
> here’s are a few (not all) comments;<br>
> <br>
> *<br>
> <br>
> There’s no clarity on the workflow between the building data you<br>
> already created and the methodology to have this data in OSM. While<br>
> the import type<br>
> <<a href="https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import#Import_Type">https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import#Import_Type</a>>section<br>
> talks about how the community will use the HOT tasking managerto<br>
> import this data to OSM, the team approach<br>
> <<a href="https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import#Team_Approach">https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import#Team_Approach</a>>section<br>
> suggests that “data import will be conducted by the *University<br>
> experienced OSM mappers* through existing OSM project accounts<br>
> (Living_Lab_Initiative)”. As this contradicts itself, does this data<br>
> import neglect the broader OSM community and its contribution? Do<br>
> the intended university students have (enough) experience with<br>
> large-scale imports like this?<br>
> <br>
> *<br>
> <br>
> The use of HOT tasking manager as suggested isn’t quite captured in<br>
> the “workflow” section. This part only mentions JOSM, OpenData<br>
> plugin, ToDo plugin, and OSM only as the tools/platforms to be used<br>
> for this import. This worries me whether there's a clear and<br>
> understandable workflow to be used for this.<br>
> <br>
> *<br>
> <br>
> QA plans are not quite well established to ensure the good quality<br>
> of the data. The wiki suggests that “Validation of the import will<br>
> be done by a second user in the Tasking Manager”. Who is this second<br>
> user? Is it global OSM contributors? Of what mapping level? Can they<br>
> be trusted with QA? etc.<br>
> <br>
> OSM guidelines suggest that “Take great care to avoid damaging the <br>
> database and don't leave a messy import and assume that nameless <br>
> OpenStreetMap contributors working in iD <br>
> <<a href="https://wiki.openstreetmap.org/wiki/ID">https://wiki.openstreetmap.org/wiki/ID</a>>and Potlatch
<br>
> <<a href="https://wiki.openstreetmap.org/wiki/Potlatch">https://wiki.openstreetmap.org/wiki/Potlatch</a>>will tirelessly complete
<br>
> your work. JOSM is better at untangling messy data, but it's still <br>
> difficult and you should do this work yourself if necessary.” Of all <br>
> things, QA should be given high priority to ensure good data.<br>
> <br>
> *<br>
> <br>
> Last but not least, this import should be registered in the import<br>
> catalogue <<a href="https://wiki.openstreetmap.org/wiki/Import/Catalogue">https://wiki.openstreetmap.org/wiki/Import/Catalogue</a>>as<br>
> it is missing there right now.<br>
> <br>
> <br>
> My honest opinion is that this import is not quite ready to be executed <br>
> with the plan that is in place. The data is quite good and of decent <br>
> quality but the process does not ensure keeping OSM without risking the <br>
> data quality in the database. I'd appreciate hearing more thoughts from <br>
> you and the mailing list members.<br>
> <br>
> <br>
> Thanks and regards,<br>
> <br>
> *----*<br>
> *Innocent,*<br>
> Phone: *+255 714 166 665* (Call & WhatsApp).<br>
> <br>
> <br>
> On Wed, Jun 2, 2021 at 9:08 PM Antidius Kawamala <antidius@dlab.or.tz <br>
> <<a href="mailto:antidius@dlab.or.tz">mailto:antidius@dlab.or.tz</a>>> wrote:<br>
> <br>
> Hello community,<br>
> The subject of this message is to inform the OSM community in Tanzania<br>
> of an import prepared by Living lab initiative as part of a project<br>
> to scale up the Open Street Mapping project,Missing Maps Initiative<br>
> by combining data obtained from manual digitization from the latest<br>
> satelite image 2019 In Tanga City.<br>
> <br>
> This import consists of more than 500 hundred thousand footprints of<br>
> buildings located in all over the Tanga region.<br>
> <br>
> A wiki page with details of the proposed import is available<br>
> here:https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import<br>
> <<a href="https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import">https://wiki.openstreetmap.org/wiki/Tanga_Building_Footprints_Import</a>><br>
> <br>
> Experienced OSM contributors who would be interested in participating in<br>
> this import will be welcome.<br>
> <br>
> A similar message regarding this import will also be shared on the OSM<br>
> mailing list,HOT and WhatsApp group for OSM Tanzania after posting<br>
> to the wiki to gather a maximum feedback.<br>
> <br>
> Don't hesitate to share your comments, questions, or problems<br>
> related to this import before it begins.<br>
> <br>
> Regards<br>
> <br>
> *Antidius Kawamala*<br>
> *GIS Specialist and **Researcher (dLab)*<br>
> *M: +255769806836*<br>
> *Founder of **RootGIS <<a href="https://rootgis.wordpress.com/">https://rootgis.wordpress.com/</a>>*<br>
> /*Skype: **Antidius Kawamala | **Twitter:**@Antidius36*/<br>
> *P.O. Box 33335 Dar es Salaam, Tanzania | College of ICT, UDSM-<br>
> Kijitonyama campus | **dLab <<a href="https://dlab.or.tz/">https://dlab.or.tz/</a>>*<br>
> <br>
> <br>
> <br>
> *<br>
> *<br>
> _______________________________________________<br>
> Talk-tz mailing list<br>
> Talk-tz@openstreetmap.org <<a href="mailto:Talk-tz@openstreetmap.org">mailto:Talk-tz@openstreetmap.org</a>><br>
> <a href="https://lists.openstreetmap.org/listinfo/talk-tz">https://lists.openstreetmap.org/listinfo/talk-tz</a><br>
> <br>
> <br>
> _______________________________________________<br>
> Talk-tz mailing list<br>
> Talk-tz@openstreetmap.org<br>
> <a href="https://lists.openstreetmap.org/listinfo/talk-tz">https://lists.openstreetmap.org/listinfo/talk-tz</a><br>
> <br>
<br>
<br>
<br>
------------------------------<br>
<br>
Subject: Digest Footer<br>
<br>
_______________________________________________<br>
Talk-tz mailing list<br>
Talk-tz@openstreetmap.org<br>
<a href="https://lists.openstreetmap.org/listinfo/talk-tz">https://lists.openstreetmap.org/listinfo/talk-tz</a><br>
<br>
<br>
------------------------------<br>
<br>
End of Talk-tz Digest, Vol 22, Issue 5<br>
**************************************<br>
</div>
</span></font></div>
</body>
</html>