On Precipitation Mapping in Iran

Investigating the spatial behavior of precipitation of iran shows that preparationof a reliable precipitation map requires a deep knowledge of the spatial behaviorof the precipitation before starting interpolation. no data areas, topographiccomplexity, complexity of precipitation mechanisms, isotropicity, number ofstations, and pixel size are the most important pre-interpolation aspects of digitalprecipitation maps for iran. this study shows that minimum number of stationsneeded for preparation of a reliable precipitation map is about 500 and the bestpixel size is about 14 kilometers.