The derived isohyetal map provides a more accurate local application of the results.
Bruno Henrique Toná Juliani, Cristhiane Michiko Passos Okawa 2017, 'Application of a Standardized Precipitation Index for Meteorological Drought Analysisof the Semi-Arid Climate Influence in Minas Gerais, Brazil', Hydrologyhttp://www.mdpi.com/2306-5338/4/2/26. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)