This study assessed the performance of recently released 3 arc second SRTM DEM version 4. 1 by CSI-CGIAR and 1 arc second ASTER GDEM version 1 and version 2 by METI-NASA in comparison with ground control points from 1:50000 digital line graphs for the coastal zone of Shandong Province. Easter China. The vertical accuracy of SRTM DEM is 13. https://allfixelectricales.shop/product-category/dryer-door-button/