UMRR La Grange 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）计划，于密西西比河上游水系（Upper Mississippi River System, UMRS）分别采集了河漫滩高程数据与水深测绘数据。尽管单独使用此类数据可满足诸多信息需求，但在多数应用场景中，亟需获取覆盖完整河道及其河漫滩的无缝高程表面。该无缝高程表面通过融合激光雷达（lidar）采集的河漫滩高程数据与水深测绘数据生成。在数据融合过程中，需针对两类数据源的过渡区域开展特殊处理工作。