森林防火监测站选址及可视域分析

Site selection of forest fire monitoring stations and visualization analysis

火灾是森林的宿敌,危害巨大。建立监测站不仅是一种有效的森林防火措施,还是我国主流的预防对策。文章基于GIS对某林区数字高程模型进行空间分析,通过分区查询统计理论提取其最高点,利用缓冲区技术去除不合理高程点,获取可视域范围较大的监测站点分布图;根据泰森多边形对监测站点监测区域进行可视域分析,获取其可视域分析指标值,同时剔除功能重复的站点,以得到其较为理想的分布。该方法只需单一的数字高程模型数据,选取站点过程考虑综合因素,可操作性强,为森林防火监测站的部署和分析提供了一种科学参考。

As the biggest enemy to forest,fire is very dangerous.The establishment of fire monitoring stations is not only an effective forest fire prevention measure,but also the dominant preventive measures in China.This paper provided the spatial analysis method with DEM of forest area,and extracted the highest point based on statistical partition query theory,removed the unreasonable elevation point based on buffer technique and obtained the distribution map of fire monitoring stations in a large range of visualization.Finally,the view-shed analysis on monitored area of the stations was made based on Thiessen Polygon theory,and some index values were obtained also.In order to get satisfactory distribution map,some points of duplicated function must be deleted.In this way,unique DEM data was used,involving integrated features.The result would provide a scientific reference for the location of fire monitoring station with its feasibility.