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Full-Text Articles in Physical Sciences and Mathematics
Mosaicing Tool For Aerial Imagery From A Lidar Bathymetry Survey, Shachak Pe'eri, Yuri Rzhanov
Mosaicing Tool For Aerial Imagery From A Lidar Bathymetry Survey, Shachak Pe'eri, Yuri Rzhanov
Center for Coastal and Ocean Mapping
Aerial imagery collected during lidar bathymetry surveying provides an independent reference dataset for ground truth. Mosaicing of aerial imagery requires some manual involvement by the operator, which is time consuming. This paper presents an automatic mosaicing procedure that creates a continuous and visually consistent photographic map of the imaged area. This study aimed to use only the frames from the aerial camera without additional information. A comparison between the features in the resultant mosaic and a reference chart shows that the mosaic is visually consistent and there is good spatial-geometric correlation of features.
Development And Assessment Of Airborne Lidar Bathymetry Products For Shoreline Mapping, Lynnette V. Morgan, Shachak Pe'eri, Andy Armstrong
Development And Assessment Of Airborne Lidar Bathymetry Products For Shoreline Mapping, Lynnette V. Morgan, Shachak Pe'eri, Andy Armstrong
Center for Coastal and Ocean Mapping
Accurate and consistent shoreline determinations play a major role in nautical charting and coastal management boundary assessment. Delineations along this dynamic margin are dependent upon the stage of tide and are demarcated by tidal datums such as Mean High Water (MHW) and Mean Lower Low Water (MLLW). This study investigated airborne lidar bathymetry (ALB) as a potential tool to support shoreline mapping. A computerized process was devised to obtain shoreline determinations from a lidar dataset processed using various algorithms and by devising a threshold to distinguish land and water. The algorithm-derived land-water interfaces are analyzed against the reference shoreline constructed …