[OSM-talk] Mapping a favela (slum)

[Arlindo Pereira]

Hi there,

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.

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

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?

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...

Cheers,

1: http://osm.org/go/OVcx0aKmL-
2: http://pt.wikipedia.org/wiki/Favela_Santa_Marta
3:
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
4: Check on Google Maps sat imagery (just to have an idea because Yahoo!
imagery is very poor):
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
5: http://www.openstreetmap.org/user/Nighto/traces/570988 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)

-- 
Arlindo Saraiva Pereira Jr.

Bacharelando em Sistemas de Informação - UNIRIO - uniriotec.br
Consultor de Software Livre da Uniriotec Consultoria - uniriotec.com

Acadêmico: arlindo.pereira at uniriotec.br
Profissional: arlindo.pereira at uniriotec.com
Geral: contato at arlindopereira.com
Tel.: +5521 92504072
Jabber/Google Talk: nighto at nighto.net
Skype: nighto_sumomo
Chave pública: BD065DEC
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