...金字塔增量更新方法 Method for Incremental Organization and Updating of Image Pyramid 06 高程基面问题浅议 On Height Datum 06 使用KML实现多细节层次技术 Implementation of LOD Technology Based on KML ..
ThekeyofGPSleveling across sea is that the heightdatumon each side of channel is notconsistent, so the general geometrical fittingmethod can not be used directly.