Annual rainfall is the cumulation of precipitation falling over the year counted in water heights and expressed in millimetres.
The spatialisation method used is a fine resolution method (1 km) taking into account the relief (AURELHY method) and applied to the observations recorded over the period 1981-2010.
The period 1981-2010 is the last current reference period, which corresponds to the duration recommended by the World Meteorological Organisation for compiling climate statistics.
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