| 巧用GIS空间叠置分析计算遮蔽角 |
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| 引用本文： | 黄太山.巧用GIS空间叠置分析计算遮蔽角[J].北京测绘,2014(6):55-57. |
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| 作者姓名： | 黄太山 |
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| 作者单位： | 安徽理工大学,安徽淮南232001;福建省国土测绘院,福建厦门361012 |
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| 摘 要： | 雷达在某个方向上发现目标的最小高低角叫遮蔽角1]。快速准确计算出气象雷达各方向的最大遮蔽角能够为雷达站的点位和天线高度提供设计依据。本文以某机场为例,在不考虑植被或建筑物高度的提前下,利用等高线数据,采用GIS的空间叠置分析功能快速计算该机场气象雷达每隔2。5°方向的最大遮蔽角。相比传统的断面计算法,GIS空间叠置分析方法大大提高了工作效率,希望能够引导读者注重GIS在工作中的应用。
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| 关 键 词： | GIS 空间叠置分析 雷达 遮蔽角 |
Using the GIS Spatial Overlay Analysis to Calculate the Defilade Angle Cleverly |
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| HUANG Tai-shan.Using the GIS Spatial Overlay Analysis to Calculate the Defilade Angle Cleverly[J].Beijing Surveying and Mapping,2014(6):55-57. |
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| Authors: | HUANG Tai-shan |
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| Institution: | HUANG Tai-shan (1. Anhui University of Science and Technology, Huainan Anhui 232001 ,China; 2. Fujian Province Land Institute of Surveying and Mapping, Xiamen Fujian 361012, China) |
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| Abstract: | The minimum angle of site at which the radar set can discover a target in a certain direction is called defilade an- gle. Quickly and accurately to calculate the maximum defilade angle of meteorological radar in all directions can provide the design basis for the position and elevation of the radar station. This paper takes an airport for example, calculates the maxi- mum defilade angle the airport meteorological radar per 2.5°direction without taking into account the advance of the height of vegetation or buildings by using the contour data. Compared with the traditional section calculation method, the GIS spatial overlay analysis method greatly improves the work efficiency,hope tp be able to guide the reader to focus on appli- cation of GIS at work. |
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| Keywords: | GIS spatial overlay analysis radar defilade angle |
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