[HOT] Guinea Ebola Outbreak, Mapping the broader area

FOFANA BAZO BAGNOUMANA fofana.13bazo at gmail.com
Sun Apr 6 17:54:17 UTC 2014


Merci bien Jean-Guilhem pour ce travail. J'ai longtemps attendu ces images
pour enfin voir ce que mon équipe et moi, peuvent y faire en matière de
cartographie. Super, super. J'espère vraiment que l'on pourra se voir
physiquement ou discuter un jour sur mumble ou skype.
fantastiques


2014-04-06 15:13 GMT+00:00 Jean-Guilhem Cailton <jgc at arkemie.com>:

>  Dear All,
>
> The Landsat-8 mosaics have been extended again, to 35 images, towards the
> South and East, and now cover all of Guinée, Sierra Leone, Liberia, western
> part of Côte d'Ivoire, to the city of Bobo-Dioulasso in Burkina-Faso
> (Fofana ;) - unrelated to Ebola outbreak.
>
> For ease of use, the URL are still unchanged. You may need to refresh your
> cache to view the new version.
>
> Reminder:
>
> tms[19]:http://imagery.openstreetmap.fr/tms/1.0.0/guinee_c10_l8_pxs432/
> {zoom}/{x}/{y}
> tms[19]:http://imagery.openstreetmap.fr/tms/1.0.0/guinee_c10_l8_pxs753/
> {zoom}/{x}/{y}
>
> Best wishes,
>
> Jean-Guilhem
>
>
> Le 29/03/2014 00:56, Jean-Guilhem Cailton a écrit :
>
> Dear All,
>
> The Landsat-8 mosaics have been extended to 22 images, and now cover all
> of Guinea and of Sierra Leone (in addition to the same parts of Liberia as
> before, and border areas of other neighboring countries).
>
> The URL are unchanged. You may need to refresh your cache to view the new
> version.
>
> Best wishes,
>
> Jean-Guilhem
>
>
> Le 28/03/2014 15:14, Andrew Buck a écrit :
>
> Hello again everyone,
>
> The task manager jobs for all of the main cities are coming along very
> nicely.  I have been amazed at how quickly the community responded to
> these jobs.
>
> In addition to the jobs in the cities, there is also some mapping that
> needs to be done over a wider area for context.  In order to help
> understand, model, and predict the spread of the disease it is useful
> to have population data for all of the villages and also road networks
> to help understand where infected people who travel might have
> traveled through.  We can help with both of these issues using the
> combination of what high resolution imagery we have (Bing, Pleiades,
> Orbview, etc), as well as some very recent LandSat 8 imagery over the
> entire affected area in 2 different color combinations.  These Landsat
> layers were put online by JGC and show natural color in the "432"
> image and a traditional "false color" image in the 753 layer listed
> below.  Both of these image layers were taken at the exact same time,
> however the 753 layer shows the area in 3 different infra-red colors.
>  By using these two layers together it is possible to tell apart
> objects that are the same color (like a village with brown roofs, vs a
> brown field).  In these images villages will appear brown in the 432
> layer and bright pink in the 753 layer.
>
> tms[19]:http://imagery.openstreetmap.fr/tms/1.0.0/guinee_c10_l8_pxs432/
> {zoom}/{x}/{y}
>
> tms[19]:http://imagery.openstreetmap.fr/tms/1.0.0/guinee_c10_l8_pxs753/
> {zoom}/{x}/{y}
>
> The best way I have found to use these is to load them both into JOSM
> with the 753 layer listed above the 432 layer.  Then, turn down the
> opactiy (transparency) on the 753 layer to about 50 to 60 percent and
> you should see the villages look quite apparent.  To start with just
> try this in an area where a lot of villages are already mapped to get
> a sense for how to set up the imagery layers and what to look for.
> Basically, the villages will be a bright pinkish hue with a kind of
> "shimmering" look from the 432 layer underneath.
>
> Hopefully we can get maybe 5 to 10 people working on this over the
> whole area we have Landsat for.  I don't think it is worth creating
> such a huge job on the task manager for this since it is such a broad
> area.  Just try to upload (and update) once every 1/2 hour or so.
> Also, it would be a good idea to install the Geochat plugin for josm
> and login to it as well as right clicking on the Geochat text box and
> clicking 'show users on map'.  This will let you see other Geochat
> users in the same area.  If all the people who work on this task use
> that setup the risk of conflicts is basically 0.  And finally, I am on
> mumble if you have any questions about the setup of what to do.  It
> would be cool to have a room of people working on this together so you
> can all share tips on there.
>
> Anyway, thanks for all the help so far and let's keep going on this
> new stuff as well.  If you plan to work on this, please just post a
> short message to the list here when you start so I can get a sense of
> how many people end up doing this.  It is a bit tricky to set up, but
> is a really fun thing to work on once you have it all set up.
>
> -AndrewBuck
>
> >
>
>
>


-- 
Fofana Bagnoumana Bazo
Etudiant en Master II (Géographie, Gestion des Ressources Naturelles)
A l'université de Ouagadougou
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