4-m Grid of Combined Multibeam and LIDAR Bathymetry from National Oceanic and Atmospheric Administration (NOAA) Surveys H11441 and H11224 offshore of New London, Connecticut (NLONDON_GEO, Geographic, WGS84)

Nearshore areas within Long Island Sound are of great interest to the Connecticut and New York research and management communities because of their ecological, recreational, and commercial importance. However, although advances in multibeam echosounder technology permit the construction of detailed digital terrain models of seafloor topography within deeper waters, limitations inherent with collecting multibeam data make using this technology in shallower waters (<10-m deep) more difficult and expensive. These limitations have often resulted in gaps of no data between multibeam bathymetric datasets and the adjacent shoreline. To address this problem, complete-coverage multibeam bathymetry acquired offshore of New London and Niantic Bay, Connecticut, has been integrated with hydrographic LIDAR acquired along the nearshore. The result is a more continuous seafloor perspective and a much smaller gap between the digital bathymetric data and the shoreline. These datasets are provided as ESRI grid and GeoTIFF formats in order to facilitate access, compatibility, and utility.

长岛海峡（Long Island Sound）内的近岸区域因其生态、休闲与商业价值，受到康涅狄格州与纽约州科研及管理界的高度关注。尽管多波束测深仪（multibeam echosounder）技术的进步已可支持在深水区构建精细的海底地形数字地形模型，但采集多波束数据的固有局限使得该技术在水深小于10米的浅水区的应用难度更高、成本更为高昂。这类局限往往导致多波束测深数据集与邻近岸线之间存在数据空白区域。为解决这一问题，研究人员将康涅狄格州新伦敦外海与尼安蒂克湾海域获取的全覆盖多波束测深数据，与沿近岸采集的水文激光雷达（hydrographic LIDAR）数据进行了融合。最终实现了更为连续的海底地貌观测视图，且数字测深数据与岸线之间的数据空白区域大幅缩减。本数据集以ESRI栅格（ESRI grid）与GeoTIFF格式（GeoTIFF）两种格式提供，以提升数据的可访问性、兼容性与实用价值。