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针对吉林省中小河流空间分布广、资料缺乏、汇流时间短等难点,本文将GIS技术应用到中小河流预警预报中。以吉林省为研究区域,在4D数据(DEM、DOM、DLG、DRG)的基础上,利用GIS海量数据管理、DEM提取、缓冲分析和空间插值分析等空间分析功能,为中小河流洪水预警预报和雨水情监视提供一种新型的时空一体化分析思路。
In view of the difficulty of space distribution of medium and small rivers in Jilin Province, lack of data and confluence time, this paper applies GIS technology to early warning and forecast of medium and small rivers. Based on the 4D data (DEM, DOM, DLG, DRG) and the spatial analysis function of GIS massive data management, DEM extraction, buffer analysis and spatial interpolation analysis, this paper takes Jilin Province as the research area, Rainwater monitoring provides a new type of integrated spatio-temporal analysis.