Google Earth高程数据精度分析及在地震勘探中的应用

摘要

The area of seismic exploration is often located in remote areas, and is always lack of terrain data. The digital elevation mod⁃el data of Google Earth ( GE) are based on SRTM and have a high precision. Based on the batch extraction of elevation data from GE, the authors analyzed the accuracy of elevation data between mountains and plains. The results show that GE elevation data and actual el⁃evation data are consistent with each other whether in the mountains or plains; The accuracy of elevation data in plain area is higher than that in mountain area. The elevation data from GE can be used to produce contours and analyze the system parameters.%地震勘探勘查区往往位于偏远地区，已知地形资料较少。 Google Earth（简称GE）采用的数字高程模型数据为SRTM，精度较高。笔者在批量提取GE高程数据的基础上，分别对山区和平原地区的GE高程数据的精度进行了分析。结果表明，无论是在山区还是平原地区，GE高程数据均与地表实际高程基本一致；在平原地区的精度高于山区；GE高程数据可以满足等高线生成和观测系统参数分析的需要。