UMRR Dresden Reach Topobathy

Separate data for floodplain elevation and bathymetry were collected on the Upper Mississippi River System (UMRS) by the US Army Corps of Engineers (USACE), Upper Mississippi River Restoration (UMRR) Program. While many information needs can be met by using these data separately, in many cases seamless elevation data across the river and its floodplain are needed. This seamless elevation surface was generated by merging lidar (i.e., floodplain elevation) and bathymetry data. Merging the data required special processing in the areas of transition between the two sources of data.美国陆军工程兵团（US Army Corps of Engineers, USACE）密西西比河上游修复（Upper Mississippi River Restoration, UMRR）项目，于密西西比河上游水系（Upper Mississippi River System, UMRS）采集了泛滥平原高程与水深分离数据集。尽管通过单独使用此类数据可满足多数信息需求，但诸多场景下需要覆盖河道及其泛滥平原的无缝高程数据。此类无缝高程表面通过合并激光雷达（lidar，即泛滥平原高程数据）与水深数据生成。在合并两类数据源的过程中，需在其过渡区域开展特殊处理。