[OSM-talk] Mapping Klong Toey Slums

hyances at gmail.com hyances at gmail.com
Thu Jul 14 22:23:13 UTC 2016

Hi Mishari,

I can share from the experience to mapping slums in Cartagena, Colombia
with a Latinamerican NGO called TECHO (is not an acronym), plus the last
steps that you list (a, b, c) we started mapping the past using Bing
imagery (normally have imagery date); then a small aerial filming
company donate
drone flights <https://www.youtube.com/watch?v=vRRHAgxioZw> to map the
present.  After that we count double of houses that community leader
beleive that exists; but using filedpapers on the field we get exact number
of houses an his conditions
(like presence of tilts to deal with floods).

Pictures from mobiles apps and ballons just serve as helpers, but maybe
could be some security issues, so we prefer to use papers, all the steps
always include community members.

This actually is a methodology for mapping slums in connection of every
house as spatial element with household surveys that give us a clear
picture of community dimensions, so useful for his inner development.

I'm glad to say that now this slum is on the way to became a formal
neighborhood and OSM map is the base to achieve that, so mapping slums can
be a tool for poverty overcome, because as a formal one, they can be part
of local administration planning services and budget, and of course, with
all this information (that became in knowledge throught action) they know
how to proceed in his development path.

I humbly hope this could help with your question; if not feel free to come
with more,

Humberto Yances

2016-07-14 5:58 GMT-05:00 Mishari Muqbil <mishari en mishari.net>:

> Hello,
> I just wanted to feedback from the community for our effort to map the
> slums in Klong Toey, Bangkok. The size of the area is about 1km x 2 km
> around here <https://www.openstreetmap.org/#map=16/13.7071/100.5763> and
> I have captured a sequence on Mapillay here
> <https://www.mapillary.com/map/search/13.711477616336708/100.5742382513609/17>.
> There are several challenges here including access to internet and English
> literacy, so I have come up with the following rough plan.
> 1. Put out a call for volunteers, work with NGOs in the area to find local
> kids who are interested in putting their community on the map.
> 2. Train the kids in using ID editor. I think I will limit them to doing
> specific things i.e. walkways, houses, trees, restaurant, convenience
> stores with individual kids limited to 2-3 features to avoid confusion then
> as they get the hang of it, increase their repertoire.
> 3. Take over a local internet cafe for a day for training and mapping
> purpose.
> Now I'm not sure about the rest of the process, you can see from Mapillary
> that due to the somewhat dense nature of the community, GPS is inaccurate
> and neither Bing nor Mapbox has enough of a resolution to be meaningful. So
> I have several (possibly overlapping) ideas.
> a) hire or borrow a drone to take aerial imagery and upload to
> openaerialmap and use that as a basemap but I'm not sure how possible it
> will be to see through the roofs.
> b) get a team of surveyor students from Prof. Garavig to map out the paths
> in the community (it's pretty big so I'm not sure how tine consuming it is)
> then have the community kids fill in the blank.
> c) use walking papers and have the kids go out, sketching what they see
> from the rooftop but I feel this may be prone to errors.
> Does anyone have any experience or tips they can share on how we can
> achieve this?
> Best regards
> Mishari
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