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In this paper, the uncertainty in geographic information systems (GISs) and existing problems in classical spatial analysis methods are summarized. Innovative concepts, such as the scale aggregation model and scale polymorphism, are proposed. A multi-scale fuzzy spatial analysis framework based on an interval type-II fuzzy set is introduced, and critical points are highlighted, such as an interval type-II fuzzy geographical object model (the boundary model and metric methods for geometric properties), direction relations, topological relations, and overlap methods. An actual case based on a multi-scale regional debris-flow hazard assessment is used to confirm the validity of the theory proposed in this paper.<\/jats:p>","DOI":"10.1142\/s021848851550004x","type":"journal-article","created":{"date-parts":[[2015,2,16]],"date-time":"2015-02-16T06:41:59Z","timestamp":1424068919000},"page":"73-104","source":"Crossref","is-referenced-by-count":4,"title":["A Multi-Scale Fuzzy Spatial Analysis Framework for Large Data Based on IT2 FS"],"prefix":"10.1142","volume":"23","author":[{"given":"Guo","family":"Jifa","sequence":"first","affiliation":[{"name":"College of City and Environmental Science, Tianjin Normal University, Binshui West Road #393, Xiqing District, Tianjin, 300387, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mao","family":"Jian","sequence":"additional","affiliation":[{"name":"College of City and Environmental Science, Tianjin Normal University, Binshui West Road #393, Xiqing District, Tianjin, 300387, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cui","family":"Tiejun","sequence":"additional","affiliation":[{"name":"College of City and Environmental Science, Tianjin Normal University, Binshui West Road #393, Xiqing District, Tianjin, 300387, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Li","family":"Chongwei","sequence":"additional","affiliation":[{"name":"College of City and Environmental Science, Tianjin Normal University, Binshui West Road #393, Xiqing District, Tianjin, 300387, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2015,2,15]]},"reference":[{"key":"p_3","first-page":"167","author":"Fisher P.","year":"2007","journal-title":"Netherlands"},{"issue":"1","key":"p_4","first-page":"139","volume":"41","author":"Guo J. 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