<html><head></head><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:13px"><div id="yui_3_16_0_1_1468505476830_14255">A funny and cheap alternative method to trace the narrow alleys and have good coordinates of POI's in the alleys : A small GPS tracker attached to a Balloon. You probably just have to assure to keep the balloon over the roofs both to have a good gps signal and to protect the balloon.<br></div><div id="yui_3_16_0_1_1468505476830_14254"><br></div><div id="yui_3_16_0_1_1468505476830_14253" dir="ltr">You coul try to have a small gps attached to a balloon with a good rope and protected in a plastic bottle. It would then be possible to walk in the alleys, take notes, use Field Paper drawings+notes and take pictures (mappillary or other) + time. Coming back you can compare the various notes / sketch / pictures and the traces using time. <br></div><div id="yui_3_16_0_1_1468505476830_16997" dir="ltr"><br></div><div id="yui_3_16_0_1_1468505476830_16998" dir="ltr">You just need to be carefull to synchronize time on GPS and other units. There are softwares to correct images coordinates with gps traces.</div><div id="yui_3_16_0_1_1468505476830_17018" dir="ltr"><br></div><div dir="ltr" id="yui_3_16_0_1_1468505476830_14251">See <a id="yui_3_16_0_1_1468505476830_14314" href="http://www.aprs.org/balloons.html">http://www.aprs.org/balloons.html</a><br></div><div dir="ltr" id="yui_3_16_0_1_1468505476830_14250"><span id="yui_3_16_0_1_1468505476830_14576"><a id="yui_3_16_0_1_1468505476830_14577" href="http://www.aprs.org/balloon-n8pk.html">http://www.aprs.org/balloon-n8pk.html</a></span></div><div id="yui_3_16_0_1_1468505476830_14250"><br></div><div id="yui_3_16_0_1_1468505476830_14249"> </div><div id="yui_3_16_0_1_1468505476830_14099" class="signature"><span style="font-style:italic;color:rgb(0, 0, 191);font-weight:bold;"> <br><font face="garamond, new york, times, serif">Pierre </font><br></span></div><div id="yui_3_16_0_1_1468505476830_14098" class="qtdSeparateBR"><br><br></div><div style="display: block;" id="yui_3_16_0_1_1468505476830_14019" class="yahoo_quoted"> <div id="yui_3_16_0_1_1468505476830_14018" style="font-family: verdana, helvetica, sans-serif; font-size: 13px;"> <div id="yui_3_16_0_1_1468505476830_14017" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, linéale; font-size: 16px;"> <div id="yui_3_16_0_1_1468505476830_14016" dir="ltr"> <font id="yui_3_16_0_1_1468505476830_14015" face="Arial" size="2"> <hr size="1"> <b><span style="font-weight:bold;">De :</span></b> Pierre Béland <pierzenh@yahoo.fr><br> <b><span style="font-weight: bold;">À :</span></b> "talk@openstreetmap.org" <talk@openstreetmap.org> <br><b><span style="font-weight: bold;">Cc :</span></b> Klaikong Vaidhayakarn <klaikong@gmail.com>; Garavig Tanaksaranond <Garavig.T@chula.ac.th>; Mishari Muqbil <mishari@mishari.net><br> <b><span style="font-weight: bold;">Envoyé le :</span></b> jeudi 14 juillet 2016 9h52<br> <b><span style="font-weight: bold;">Objet :</span></b> Re: [OSM-talk] Mapping Klong Toey Slums<br> </font> </div> <div class="y_msg_container"><br><div id="yiv9584863075"><div><div style="color:#000;background-color:#fff;font-family:verdana, helvetica, sans-serif;font-size:13px;"><div id="yiv9584863075yui_3_16_0_1_1468502103341_26551">Hi Mishari,</div><div id="yiv9584863075yui_3_16_0_1_1468502103341_26518"><br clear="none"></div><div id="yiv9584863075yui_3_16_0_1_1468502103341_26572">This is efffectively a good challenge to map such area. With the dense housing, remote mappers cannot interpret the imagery and spot either klones or paths. From local knowledge, <br clear="none"></div><div id="yiv9584863075yui_3_16_0_1_1468502103341_26712"><br clear="none"></div><div id="yiv9584863075yui_3_16_0_1_1468502103341_26711">The first step would be to trace as much info as possible from the imagery :</div><div dir="ltr" id="yiv9584863075yui_3_16_0_1_1468502103341_26642">- big buildins</div><div dir="ltr" id="yiv9584863075yui_3_16_0_1_1468502103341_26643">- parks</div><div dir="ltr" id="yiv9584863075yui_3_16_0_1_1468502103341_26644">- klones and paths (with local knowledge, you can probably interpret the images and trace)<br clear="none"></div><div id="yiv9584863075yui_3_16_0_1_1468502103341_26404"><span><br clear="none"></span></div><div dir="ltr" id="yiv9584863075yui_3_16_0_1_1468502103341_26691"><span id="yiv9584863075yui_3_16_0_1_1468502103341_26692">For the second step, as you suggested, various methods could be used. This is also and interesting challenge to try various ones and compare. With enough details added to the map, it would be possible I think to use FieldPapers and add POI's as restaurants or other features.<br clear="none"></span></div><div id="yiv9584863075yui_3_16_0_1_1468502103341_26690"><span><br clear="none"></span></div><div id="yiv9584863075yui_3_16_0_1_1468502103341_26865"><span id="yiv9584863075yui_3_16_0_1_1468502103341_26882">Drone imagery is also interesting if you can have authorization to fly in the area. We used drone imagery in north of Haiti to trace in dense areas and we could see easily paths around the houses. But the area was not as dense as yours.</span></div><div id="yiv9584863075yui_3_16_0_1_1468502103341_26447"> </div><div class="yiv9584863075signature" id="yiv9584863075yui_3_16_0_1_1468502103341_26448"><span id="yiv9584863075yui_3_16_0_1_1468502103341_28416" style="font-style:italic;color:rgb(0, 0, 191);font-weight:bold;"> <br clear="none"><font id="yiv9584863075yui_3_16_0_1_1468502103341_28417" face="garamond, new york, times, serif">Pierre </font><br clear="none"></span></div><div class="yiv9584863075qtdSeparateBR" id="yiv9584863075yui_3_16_0_1_1468502103341_26453"><br clear="none"><br clear="none"></div><div class="yiv9584863075yahoo_quoted" id="yiv9584863075yui_3_16_0_1_1468502103341_26459" style="display:block;"> <div id="yiv9584863075yui_3_16_0_1_1468502103341_26458" style="font-family:verdana, helvetica, sans-serif;font-size:13px;"> <div id="yiv9584863075yui_3_16_0_1_1468502103341_26457" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande,;font-size:16px;"> <div dir="ltr" id="yiv9584863075yui_3_16_0_1_1468502103341_26456"> <font id="yiv9584863075yui_3_16_0_1_1468502103341_26455" face="Arial" size="2"> </font><hr id="yiv9584863075yui_3_16_0_1_1468502103341_26454" size="1"> <b><span style="font-weight:bold;">De :</span></b> Mishari Muqbil <mishari@mishari.net><br clear="none"> <b><span style="font-weight:bold;">À :</span></b> talk@openstreetmap.org <br clear="none"><b><span style="font-weight:bold;">Cc :</span></b> Klaikong Vaidhayakarn <klaikong@gmail.com>; Garavig Tanaksaranond <Garavig.T@chula.ac.th><br clear="none"> <b><span style="font-weight:bold;">Envoyé le :</span></b> jeudi 14 juillet 2016 6h58<br clear="none"> <b><span style="font-weight:bold;">Objet :</span></b> [OSM-talk] Mapping Klong Toey Slums<br clear="none"> </div> <div class="yiv9584863075y_msg_container" id="yiv9584863075yui_3_16_0_1_1468502103341_26554"><br clear="none"><div class="yiv9584863075yqt4727213346" id="yiv9584863075yqt19254"><div id="yiv9584863075">
<div id="yiv9584863075yui_3_16_0_1_1468502103341_26557">
Hello,<br clear="none">
<br clear="none">
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 <a rel="nofollow" shape="rect" target="_blank" href="https://www.openstreetmap.org/#map=16/13.7071/100.5763">here</a>
and I have captured a sequence on Mapillay <a rel="nofollow" shape="rect" target="_blank" href="https://www.mapillary.com/map/search/13.711477616336708/100.5742382513609/17">here</a>.
There are several challenges here including access to internet and
English literacy, so I have come up with the following rough plan.<br clear="none">
<br clear="none">
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.<br clear="none">
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.<br clear="none">
3. Take over a local internet cafe for a day for training and mapping
purpose.<br clear="none">
<br clear="none">
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.<br clear="none">
<br clear="none">
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.<br clear="none">
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.<br clear="none">
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.<br clear="none">
<br clear="none">
Does anyone have any experience or tips they can share on how we can
achieve this?<br clear="none">
<br clear="none">
Best regards<br clear="none">
Mishari<br clear="none">
</div>
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