[HOT] Malawi Flood TM job #847

Severin Menard severin.menard at gmail.com
Fri Jan 23 18:08:17 UTC 2015


The Southern parts of Malawi along the Lower Shire river
<http://en.wikipedia.org/wiki/Shire_River> (that connects Lake Malawi and
Zambezi River) are frequently flooded and affects the villages of farmers
around. Since mid January 2015, they are critically hit (read eg this

I have created this job <http://tasks.hotosm.org/project/847> in order to
map the affected residential area. You may know or remember that HOT has
been involved in 2014 in a Community Mapping and Training project with the
national Department of Disaster Management Affairs in Malawi. DoDMA and
GFDRR <https://www.gfdrr.org/about_gfdrr> agreed about the necessity to
have detailed data of the region, through a community mapping in the field,
that could be used to build hazard impact scenarios with tools like InaSafe
in order to improve the planning, preparedness and response activities HOT
funded Project
At that time the flood prone area have been identified through local
experience and knowledge from DoDMA headquarters, DoDMA districts officers,
Heads of Groups of Villages and local people. All the residential areas
have been mapped as well as all the buildings and water&sanitation objects.

Since the floods, GFDRR got a "TerraSAR-X/TanDEM-X © 2015 German Aerospace
Center (DLR), 2015 Airbus Defense and Space / Infoterra GmbH" imagery,
captured 13th Jan 2015, whose analysis shows clearly the flood extent. This
extent has been intersected with residential areas from OSM and the output
has been with a 50 m buffered. (Note: the blue outline on the map on the
right is an automatic buffer created by the Tasking Manager, it does not
mean anything, so please do not consider it).

*This job aims at adding the missing buildings, that will serve to estimate
the number of affected people for each settlement. Please join!*

* WARNING:* sometimes the buildings have been created as a node. Please do
not delete them as they generally encompass a lot of attributes from the
field survey done in August-September 2014.


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