| 基于GIS的缓冲区生成模型理论和方法 |
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| 引用本文： | 吕妙儿,黄杏元.基于GIS的缓冲区生成模型理论和方法[J].科技通报,2000,16(5):356-360. |
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| 作者姓名： | 吕妙儿 黄杏元 |
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| 作者单位： | 南京大学城市与资源学系,江苏南京,210093 |
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| 摘 要： | 缓冲区可分为空间物体与邻近对象只呈单一距离关系的静态缓冲区和空间物体对邻近对象的影响度随距离变化而呈不同强度的扩散或衰减的动态缓冲区。缓冲区的生成包括单个目标缓冲区生成和多个目标重叠缓冲区多边形间的合并。静态缓冲区生成是在空间物体周围建立一定宽度的带状区；动态缓冲区的生成则根据空间物体对周围对象的影响度随距离变化而变化的性质选择线性模型、二次模型和指数模型。缓冲区的重叠合并有数学运算法、矢量栅格转
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| 关 键 词： | 静态缓冲区 动态缓冲区 缓冲区生成模型 GIS |
The Theory and Methodology of the Buffer-creation Model Based on GIS |
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| LU Miao-er,HUANG Xing-yuan.The Theory and Methodology of the Buffer-creation Model Based on GIS[J].Bulletin of Science and Technology,2000,16(5):356-360. |
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| Authors: | LU Miao-er HUANG Xing-yuan |
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| Abstract: | Buffer is a zone around a geographic entity to find out to what extent it influences the other objects around it. Static buffer is only a simple zone around the entity, but in dynamic buffer, the influence is changed alone with the distance between the entity and the around objects. It also needed to merge overlapping parts of several buffers. The mixing method first completes the changing from vector data to raster data, and then scans the border of the raster zone and extracts the vector arcs on the scan way which are necessary for the finally buffer polygon. Then put these vector arcs into a mathematics intersect operation, at last form a close buffer polygon with the rule of four arcs node. |
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| Keywords: | buffer static buffer dynamic buffer four arcs node nonbuffer island |
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