Yu LiuYihong YuanSong Gao2025-05-142025-05-142019jz000156-0303https://tustorage.ulb.tu-darmstadt.de/handle/tustorage/28500550Modeling the Vagueness of Areal Geographic Objects: A Categorization SystemArticlehttps://doi.org/10.3390/ijgi8070306