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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Well, up to today, all the work is being done by AGIV. The municipalities can report issues with the database, it still is AGIV that sends out
a contractor to do the mapping. And we always check 10% of the work our contractors bring in. Hence, the quality should be pretty much equal all over Flanders.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Now in the future, the municipalities will be able to do their own mapping. They can send in as-built plans after construction works (public domain,
not houses), those plans will be integrated in the GRB.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Indeed, new houses are not yet fully mapped. A surveyor can of course not enter private terrain to map the back side of houses. So they map the
front and add 5 meters to create the shape. We are currently updating those houses based on aerial mapping. In the future we will no longer release those half-mapped houses (people call them “garageboxen”). We have new aerial images every year, the houses
will be released only when fully mapped.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">And indeed, mapping houses is a lot easier in rural areas than in urban areas. Building layouts can be complicated and the only indications our
mappers have is what’s visible form the air (of course in combination with what was visible to the surveyor in the street). Perhaps a guesstimation sometimes looks better, but still what you see on the GRB is what is seen on aerial images. It could be that
reality is more complex than a guesstimation. I’m not saying it all is perfect, but things like projection distortion should be rather exceptional, since they’re mapped with a stereo photo mapping technique.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">jan<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Stijn Rombauts [mailto:stijnrombauts@yahoo.com]
<br>
<b>Sent:</b> maandag 5 januari 2015 21:29<br>
<b>To:</b> OpenStreetMap Belgium<br>
<b>Subject:</b> Re: [OSM-talk-be] WMS (aerial) imagery covering Belgium, now conveniently packaged for adding it to JOSM<o:p></o:p></span></p>
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</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<div id="yui_3_16_0_1_1420488230913_2837">
<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">Even in het Nederlands als ik mag.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">De gemeentes zijn verantwoordelijk voor 'hun' GRB. Ik vermoed dat alle gemeentes de opbouw van hun GRB uitbesteed hebben aan landmeters. Misschien dat
updates (zie bv. <a href="https://www.agiv.be/news/2014/december/update-grootschalig-referentiebestand-20-12-2014" id="yui_3_16_0_1_1420488230913_3311">
https://www.agiv.be/news/2014/december/update-grootschalig-referentiebestand-20-12-2014</a>) door de gemeentes zelf aan het GRB worden toegevoegd. Maar het is dus perfect mogelijk dat de kwaliteit in de ene gemeente minder is dan in een andere gemeente. Maar
ze zouden eigenlijk toch allemaal moeten voldoen aan de eisen die door AGIV zijn opgelegd.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">De gebouwen in het GRB zijn gebaseerd op topografische opmetingen op terrein en op luchtfoto's. Waar mogelijk zijn de voorgevels opgemeten: die zouden
dus behoorlijk correct moeten zijn. De rest is gebaseerd op de luchtfoto's. Zo krijg je soms vreemde toestanden van recente gebouwen waarvan de voorgevel is opgemeten, maar het achterliggende stuk grotendeels ontbreekt omdat ze niet op de luchtfoto's staan/stonden.
De huizen in Beekstraat 55-61 zijn waarschijnlijk zo'n geval.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">Groetje,<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">StijnRR<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<div id="yui_3_16_0_1_1420488230913_2810">
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<span style="font-family:"Helvetica","sans-serif";color:black">
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<p class="MsoNormal" style="background:white"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">From:</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> Marc Gemis <<a href="mailto:marc.gemis@gmail.com">marc.gemis@gmail.com</a>><br>
<b>To:</b> OpenStreetMap Belgium <<a href="mailto:talk-be@openstreetmap.org">talk-be@openstreetmap.org</a>>
<br>
<b>Sent:</b> Monday, January 5, 2015 8:23 PM<br>
<b id="yui_3_16_0_1_1420488230913_5824">Subject:</b> Re: [OSM-talk-be] WMS (aerial) imagery covering Belgium, now conveniently packaged for adding it to JOSM</span><span style="font-family:"Helvetica","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
<div id="yiv9445666263">
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">I assume the quality depends on the GIS person adding the data. If he/she is less motivated/less capable/... the quality will be less.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<div id="yui_3_16_0_1_1420488230913_2816">
<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">The example that you give seems like the classic case where the building was not yet finished when it was traced. Then they always draw a small rectangle
along the front side.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">regards<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">m<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">On Mon, Jan 5, 2015 at 7:56 PM, Sander Deryckere <<a href="mailto:sanderd17@gmail.com" target="_blank">sanderd17@gmail.com</a>> wrote:<br>
<br>
<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Helvetica","sans-serif";color:black">I think Pablo also helped in some pieces of the GRB:
<a href="http://www.geopunt.be/kaart?viewer_url=http%3A%2F%2Fmaps.geopunt.be%2Fresources%2Fapps%2FGeopunt-kaart_app%2Findex.html%3Fid%3Dff8080814a6e1332014abb6b94c80023" target="_blank" id="yui_3_16_0_1_1420488230913_2825">
http://www.geopunt.be/kaart?viewer_url=http%3A%2F%2Fmaps.geopunt.be%2Fresources%2Fapps%2FGeopunt-kaart_app%2Findex.html%3Fid%3Dff8080814a6e1332014abb6b94c80023</a><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Helvetica","sans-serif";color:black">Is it normal that quality differs from municipality to municipality? In Staden, I haven't seen any problem with GRB. But in Roeselare,
I often bump into problems like these. Buildings with a completely clear form (however, they're often quite new, so perhaps drawn without aerial pics), but drawn completely wrong in GRB.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">Up until now, I've avoided the old centre of the town, because the building layouts are way too complicated there. It might get easier when we have
access to the GRB.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Helvetica","sans-serif";color:black">So yes, an automated import won't work, but being able to use it opens up a lot of perspectives, so thanks to anyone involved.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">Regards,<br>
Sander<o:p></o:p></span></p>
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<div id="yui_3_16_0_1_1420488230913_2828">
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">2015-01-05 15:35 GMT+01:00 Gilbert Hersschens <<a href="mailto:ghersschens@gmail.com" target="_blank">ghersschens@gmail.com</a>>:<br>
<br>
<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">In comparison to Bing even Picasso wins ;-)<o:p></o:p></span></p>
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<div id="yui_3_16_0_1_1420488230913_2832">
<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica","sans-serif";color:black">On 5 January 2015 at 15:30, Glenn Plas <<a href="mailto:glenn@byte-consult.be" target="_blank">glenn@byte-consult.be</a>> wrote:<br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Helvetica","sans-serif";color:black">In my experience, the outlines and building shapes I've seen in GRB are<br>
like 10 times better than all the work that exists using bing and other<br>
sources.<br>
<br>
A one on one copy would be silly, but if you bring it all together,<br>
agiv/grb and osm data, it helps to make sense of what you are looking<br>
at. Also it is conclusive usually when new buildings replace older.<br>
It's the best source, I don't really care if the house isn't exactly as-is.<br>
<br>
The housenumber inports will take years, but it's fine as it is as tons<br>
of intelligent choices and conclusions, mistakes and other uglynes needs<br>
to be fixed too. And it all helps, if you overlay them with some<br>
transparacy adding GRB would be an awesome tool.<br>
<br>
I've been doing housenumer entries for weeks now, grb layer would<br>
defenitely be of good help. But never a dumb copy.<br>
</span><span style="font-family:"Helvetica","sans-serif";color:#888888"><br>
Glenn<br>
</span><span style="font-family:"Helvetica","sans-serif";color:black"><br>
On 05-01-15 15:05, Gilbert Hersschens wrote:<br>
> Guys,<br>
><br>
> Don't get overly exited about the building shapes. The quality of those<br>
> shapes is quite variable. For free standing houses they are OK - in some<br>
> cases even excellent, but for urban areas they are not very useful,<br>
> certainly not as a source for import. I have been using those shapes for<br>
> quite a while for comparison in cases where severe projection distortion<br>
> and strong shadows gave me a hard time to figure out the shape of a<br>
> particular building and in many cases the shapes in GRB were not better<br>
> or even worse than my own "guesstimation".<br>
> They're OK for "second opinions" but I would never use a tool to import<br>
> those shapes.<br>
> Just my 2 cents.<o:p></o:p></span></p>
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