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  • 软件名称:利用共线方程的ALOS DEM制作误差分析
  • 软件大小: 0.00 B
  • 软件评级: ★★★
  • 开 发 商: 范兴旺,刘元波
  • 软件来源: 《遥感技术与应用》
  • 解压密码:www.gissky.net

资源简介

摘要: 卫星遥感是获取DEM数据的重要手段,定量化和降低DEM数据误差是应用DEM数据的前提。在共线方程理论的基础上,模拟分析了DEM数据精度与内外方位元素之间的定量关系,以覆盖鄱阳湖地区的ALOS PRISM立体像对为研究数据,根据SRTM数据计算DEM误差,并求解影像内外方位元素误差。研究表明:影像角度误差是影响DEM误差的主要因素。消除角度元素误差后,DEM数据误差的均值由4.4 m降为0.2 m,标准差由7.7 m降为2.7 m。 关键词: DEM;  SRTM;  ALOS PRISM;  内方位元素;  外方位元素     Abstract: According to the characteristics of the spatiotemporal data collected by Field Wireless Sensor Network,common spatiotemporal outlier detection methods were summarized,an method regarding time series similarity as spatiotemporal neighborhood was proposed to gain precisely mine outlier information of those spatiotemporal data .This method is verified by observation data acquired by 13 sites of Heihe Watershed Ecological and Hydrological Wireless Sensor Network on July 5th,2012,and the result indicates that anomaly of spatiotemporal data of the wireless sensor network was effectively identified,and several fake anomaly which caused by artificial irrigation and rainstorm were also identified,and this method  is of certain guidance significance for other data processing exploratory studies.

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