利用ASTER数据融合的SRTM空值填补方法

A SRTM null patching method using ASTER data fusion

由于雷达干涉采集误差导致SRTM数据出现高程空值,为了保证数据完整性,需要对其进行空值修补。本文总结了国内外对SRTM数据空值的填补方法,提出了一种在内插的基础上利用ASTER数据进行数据融合的空值填补方法。该方法首先对ASTER数据进行预处理,以消除两者之间的高程差异,然后利用处理后的90m间隔ASTER数据对SRTM数据进行融合,从而实现了SRTM数据的空值填补。实例验证了该方法是一种获取完整地形数据的有效途径。

Radar interferometry collection method causes elevation regions to appear null values and singular points of SRTM data. In order to ensure data integrity, the null needs to be patched. The paper summarized the void filling method of SRTM data used in domestic and foreign, and proposed a void filling method that uses ASTER data fusion based on interpolation method. This method firstly pretreated ASTER data, then eliminated the elevation distinction of these two data. At last it fused the treated data and the original SRTM data. This method was confirmed by instance and re^arded as an effective way to acauire the complete terrain data.