Risk mapping
Practical Action
Outline for the preparation of risk maps by using geographic information
systems
How are threat maps prepared?
1. Initial inputs
Analogical maps of the
work area.
Available digital maps
of the area at the scale
on which the work is to
be carried out .
Typing of the maps.
Actions that may raise our
vulnerability
2. Field trip
Identification of the
work area
Identification of
existing threats
Plotting of GPS
points of the threats
Plotting of control
points of the town
centre
3. Preparation of threat maps
Identification of
existing threats
Determination of
physical variables
(precipitation, soil
type, slope,
meteorological event)
to use in generating
the threat map
Definition of the
specific work area
Preparation of the
threat map in
quantitative values.
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