文章基本信息

标题：Identifying Vector Feature Textures Using Fuzzy Sets
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作者：Chris Anderson-Tarver ; S. Leyk ; Barbara P. Buttenfield 等
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII Part 4
出版社：Copernicus Publications
摘要：This paper describes a method to approach area-patch problems in model generalization using fuzzy set theory. The area patchproblem identifies problems in generalizing areas (polygons) with the same semantics (feature code) but varying geometry andspatial distribution. Area-patch generalization can be understood as a pattern recognition problem with a variety of viable solutions,constrained by the purposes of the generalized output. In this research constraints are defined by common USGS cartographicmeasures for feature generalization. The vagueness, which is inherent in area-patch problems, stems from special cases such asarchipelagos. Archipelagos are collections of polygons, any one of which may not contribute significantly to the pattern of thedatabase, but may become prominent when conceptualized as a group.The paper demonstrates how to access the vague concept of archipelagos in a GIS environment using fuzzy sets to improve areapatch generalization. We develop our method generalizing swamps and marshes in an NHD High-Resolution subbasin datasetspanning the Florida-Georgia border. Fuzzy membership functions are assigned for area, inter-polygon distance and number ofneighbors within a predefined distance as known contributors to texture. These attributes are combined in a fuzzy overlay to derivedegrees of memberships of polygons to the concept of a prototypical archipelago. The final delineation of archipelagos is based on'alpha cuts' thresholding. A sensitivity analysis evaluates the impact of alpha-cuts on the resulting pattern recognition.For validation we compare the change in geometric properties (area, area/perimeter ratios) of polygons and overall texture from theoriginal scale to the target scale between our approach and a solution that does not take into account archipelagos. Preliminaryfindings indicate that a fuzzy set approach allows for the capture of archipelagos, which would otherwise not be included in ageneralization solution
关键词：Area-Patch; Fuzzy Set Theory; Automated Model Generalization; Archipelagos; Pattern Recognition