| 长对角线法实现GIS中矢量地图面状地物汉字注记的自动配置 |
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| 引用本文： | 姜永发, 张书亮, 兰小机, 闾国年. 长对角线法实现GIS中矢量地图面状地物汉字注记的自动配置[J]. 武汉大学学报 ( 信息科学版), 2005, 30(6): 544-548. |
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| 作者姓名： | 姜永发 张书亮 兰小机 闾国年 |
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| 作者单位： | 1 南京师范大学地理信息科学江苏省重点实验室,南京市宁海路122号,210097 |
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| 基金项目： | 南京师范大学GIS国家重点学科资助项目。 |
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| 摘 要： | 从图形学角度探讨了面状要素自动注记的问题,认为对于GIS矢量地图中大量的复杂面状图形可以通过简化后构建其简单多边形,进而获取简单多边形内的最长对角线作为注记配置的基准线,提出了一种简单快速的地图面状地物汉字注记自动配置的新算法。
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| 关 键 词： | 长对角线 面状地物 注记 自动配置 |
| 文章编号： | 1671-8860(2005)06-0544-05 |
| 收稿时间： | 2005-02-28 |
| 修稿时间： | 2005-02-28 |
Automatic Placement of GIS Vector Map Annotation in Area Feature by Long-Diagonal |
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| JIANG Yongfa, ZHANG Shuliang, LAN Xiaoji, L Guonian. Automatic Placement of GIS Vector Map Annotation in Area Feature by Long-Diagonal[J]. Geomatics and Information Science of Wuhan University, 2005, 30(6): 544-548. |
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| Authors: | Jiang Yongfa ZHANG Shuliang LAN Xiaoji L Guonian |
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| Affiliation: | 1 Jiangsu of Geographic Information Science, Nanjing Normal University, 122 Ninghai Road, Nanjing 210097,China |
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| Abstract: | 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 polygons are simplified according to close points, then the longest diagonal is gotten, lastly, annotations are placed along long-diagonal. For special ones ,the polygon is partitioned off several parts by a certain rule for getting its sub-diagonals, then its annotation is placed by means of the second. |
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| Keywords: | long-diagonal area feature annotation automatic placement |
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