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Corrected map of Trewartha using proper boundary for arid climate types, according to Castro et al. Used more appropriate projection and changed color scheme for tropical types. Included new colors for areas that don't match up with Trewartha's scheme, in particular areas classifiable as Cs, except for their annual precipitation exceeding the annual threshold and areas that would be Cf, but have dry summer months (but lack the other necessary characteristics to be classified as Cf)