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Automatic Placement of GIS Vector Map Annotation in Area Feature by Long Diagonal 被引量:2
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作者 LAN Xiaoji JIANG Yongfa +1 位作者 Lü Guonian DENG Huamei 《Geo-Spatial Information Science》 2005年第4期276-281,共6页
This paper discusses the placement of Chinese annotation from point of view of graphics. Area Feature is classified as simple polygon, complex polygon and special polygon. For simple ones, annotations are placed along... This paper discusses the placement of Chinese annotation from point of view of graphics. Area Feature is classified as simple polygon, complex polygon and special polygon. For simple ones, annotations are placed along the longest edge. For complex ones, firstly the polygon are simplified according to close points, then the longest diagonal is gotten by comparing length, lastly, annotations are placed along long diagonal. For special ones, the polygon are partitioned into several parts by a certain rule for getting their sub\|diagonals, then their annotation are placed by means of the second. 展开更多
关键词 long-diagonal area eature ANNOTATION automatic placement
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