一种地形变化检测与DEM更新的方法研究

Approach for Terrain Change Detection and DEM Updating

提出了一种使用旧时期的DEM和最新的航摄资料检测地形变化,同时更新DEM的方法。利用陕西省两个地区的数据对该方法进行了验证,结果表明变化检测和数据更新的精度比较理想。与现有的生产流程相比,该方法在效率方面有明显的优势,对原始数据的要求较低,最终的产品更加丰富,方法也更加稳健和自动化。

An efficient and fully automatic approach to detect terrain changes and update old DEM simultaneously with outdated DEM and up-to-date aerial stereoscopic pair is presented. The related tests are done with geo-spatial data from two regions in China, and experimental results of both change detection and updating are satisfactory. Compared with existing procedure in production, the approach excels at efficiency markedly, requires less for source data, produces more products, and it is more robust and automatic.