<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt">Congrats, Arlindo!<br><br>Here in Kibera, we purchased recent satellite imagery, but you can only tell so much. And we use the Garmin eTrex Legend HCx. Kibera is very dense, and the tracks are often not that precise. But in combination, we can have good certainty of where the paths lie .. the GPS tracks give a rough guide, and interpretation of the imagery with local knowledge helps a lot.<br><br>So my recommendation is the combination :)<br><br>We're using Walking Papers too. We need to put some more work into WP .. Kibera POIs are so dense, some of the nodes aren't rendered, which can be confusing.<br><br>Cheers<br>Mikel<br><br><div> </div>== Mikel Maron ==<br><span><a target="_blank" href="http://mapkibera.org/">http://mapkibera.org/</a></span><br>+254 (0)
724899738<br>mikel@osmfoundation.org<div><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font size="2" face="Tahoma"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Arlindo Pereira <nighto@nighto.net><br><b><span style="font-weight: bold;">To:</span></b> osm-talk <talk@openstreetmap.org><br><b><span style="font-weight: bold;">Cc:</span></b> Claudomiro Nascimento Junior <claudomiro@claudomiro.com>; Mikel Maron <mikel_maron@yahoo.com><br><b><span style="font-weight: bold;">Sent:</span></b> Mon, November 23, 2009 4:39:24 AM<br><b><span style="font-weight: bold;">Subject:</span></b> Mapping a favela (slum)<br></font><br>
Hi there,<br><br>I'm very proud to announce that I started to map my first favela here in Rio, the Favela Santa Marta [1] [2] [3]. It has a funicular system to the top, and I've added a couple of POIs.<br><br>However (and obviously), the GPS tracks were completely erratic due to the sub-meter wide footpaths. I've tried with my Nokia N95 GPS. It is very dense [4] there, you can check how erratic was the log [5]. But it is already something! :D<br>
<br>Judging the satelite image, what do you think it would be better: purchasing sub-meter pixel satellite imagery, an expensive GPS unit or a combination of both?<br><br>I believe that once the main footpaths/stairways are mapped, we can have mapping parties with Walking Papers. I'd love to have the kids helping by adding POIs, for instance. Perhaps talking with the local school...<br>
<br>Cheers,<br><br><span>1: <a target="_blank" href="http://osm.org/go/OVcx0aKmL">http://osm.org/go/OVcx0aKmL</a>-</span><br><span>2: <a target="_blank" href="http://pt.wikipedia.org/wiki/Favela_Santa_Marta">http://pt.wikipedia.org/wiki/Favela_Santa_Marta</a></span><br><span>
3: <a target="_blank" href="http://translate.google.com/translate?js=y&prev=_t&hl=pt-BR&ie=UTF-8&u=http%3A%2F%2Fpt.wikipedia.org%2Fwiki%2FFavela_Santa_Marta&sl=pt&tl=en">http://translate.google.com/translate?js=y&prev=_t&hl=pt-BR&ie=UTF-8&u=http%3A%2F%2Fpt.wikipedia.org%2Fwiki%2FFavela_Santa_Marta&sl=pt&tl=en</a></span><br><span>
4: Check on Google Maps sat imagery (just to have an idea because Yahoo! imagery is very poor): <a target="_blank" href="http://maps.google.com.br/maps?f=q&source=s_q&hl=pt-BR&geocode=&q=dona+marta,+botafogo,+rj&sll=0,0&sspn=74.600551,158.027344&ie=UTF8&hq=&hnear=Botafogo+-+Rio+de+Janeiro+-+RJ&ll=-22.947333,-43.194632&spn=0.002262,0.004823&t=k&z=18">http://maps.google.com.br/maps?f=q&source=s_q&hl=pt-BR&geocode=&q=dona+marta,+botafogo,+rj&sll=0,0&sspn=74.600551,158.027344&ie=UTF8&hq=&hnear=Botafogo+-+Rio+de+Janeiro+-+RJ&ll=-22.947333,-43.194632&spn=0.002262,0.004823&t=k&z=18</a></span><br><span>
5: <a target="_blank" href="http://www.openstreetmap.org/user/Nighto/traces/570988">http://www.openstreetmap.org/user/Nighto/traces/570988</a> Please notice I forgot to pause the logging as soon as I left the slum so the track continue in a few streets (already mapped)</span><br clear="all">
<br>-- <br>Arlindo Saraiva Pereira Jr.<br><br>Bacharelando em Sistemas de Informação - UNIRIO - <a rel="nofollow" target="_blank" href="http://uniriotec.br">uniriotec.br</a><br>Consultor de Software Livre da Uniriotec Consultoria - <a rel="nofollow" target="_blank" href="http://uniriotec.com">uniriotec.com</a><br>
<br>Acadêmico: <a rel="nofollow" ymailto="mailto:arlindo.pereira@uniriotec.br" target="_blank" href="mailto:arlindo.pereira@uniriotec.br">arlindo.pereira@uniriotec.br</a><br>Profissional: <a rel="nofollow" ymailto="mailto:arlindo.pereira@uniriotec.com" target="_blank" href="mailto:arlindo.pereira@uniriotec.com">arlindo.pereira@uniriotec.com</a><br>
Geral: <a rel="nofollow" ymailto="mailto:contato@arlindopereira.com" target="_blank" href="mailto:contato@arlindopereira.com">contato@arlindopereira.com</a><br>
Tel.: +5521 92504072<br>Jabber/Google Talk: <a rel="nofollow" ymailto="mailto:nighto@nighto.net" target="_blank" href="mailto:nighto@nighto.net">nighto@nighto.net</a><br>Skype: nighto_sumomo<br>Chave pública: BD065DEC<br>
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