TY - JOUR T1 - DWSI: an approach to solving the polygon intersection-spreading problem with a parallel union algorithm at the feature layer level JO - Boletim de Ciências Geodésicas A1 - Fan, Junfu A1 - Zhou, Chenghu A1 - Ma, Ting A1 - Ji, Min A1 - Zhou, Yuke A1 - Xu, Tao SN - 1982-2170 UL - 10.1590/s1982-21702014000100011 VL - 20 Y1 - 2014 PB - Brasil ER -