As the Ebola Outbreak is expanding in the neighboring countries, humanitarians
need various geographic information. We started this activation to respond to
CartONG - MSF-CH needs. And now the US Red Cross is asking to add more cities
to respond to needs of teams deploying in other areas.
The OSM contributors response to map in detail the various towns was fantastic
so far. Note that new Task Manager Jobs are still added fot this.
In the rural areas where no Bing Imagery is available, we use the Landsat
Imagery prepared by Jean-Guilhem to identify the landuse areas. We are asking
the contributors to circle the residential areas and create a landuse area
polygon. Study made by Andrew Buch shows that we can use information about
surface of a village to estimate is population.
This information can be very useful for the humanitarian organizations working
on these territories.
It would be important also to take care of the highway network. This again can
be done using the Landsat imagery. We are asking the more experienced mappers
to go through the territory and trace the road network.
Cumulatives statistics from March 25 up March 28, midnight (3 days) show a
significant effort from the OSM community : 182OSM contributors, 520,000
objects, 62,600 buildings
Thanks again all the contributors.
Pierre
Andrew notes about Landsat Imagery
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._______________________________________________
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