@article{fan_zhou_ma_ji_zhou_xu_2014,  title={DWSI: an approach to solving the polygon intersection-spreading problem with a parallel union algorithm at the feature layer level},  volume={20},  ISSN={1982-2170},  url={https://doi.org/10.1590/s1982-21702014000100011},  DOI={10.1590/s1982-21702014000100011},  number={1},  journal={Boletim de Ciências Geodésicas},  publisher={Universidade Federal do Paraná},  author={Fan, Junfu and Zhou, Chenghu and Ma, Ting and Ji, Min and Zhou, Yuke and Xu, Tao},  year={2014},  month={Jan},  pages={159–182} }