4-m Grid of Combined Multibeam and LIDAR Bathymetry from National Oceanic and Atmospheric Administration (NOAA) Surveys H11442 and H11225 offshore of Niantic, Connecticut (NIANTIC_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）内的近岸海域因兼具生态、休闲与商业价值，深受康涅狄格州与纽约州的科研与管理界关注。然而，尽管多波束测深仪（multibeam echosounder）技术的进步已可实现深水区域海底地形精细数字地形模型的构建，但多波束数据采集本身存在固有局限，导致该技术在浅水区（水深<10米）的应用既困难又成本高昂。此类局限常导致多波束水深地形（multibeam bathymetric）数据集与相邻岸线之间出现数据空白区。为解决这一问题，本数据集整合了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水深地形数据，以及沿近岸采集的水文激光雷达（hydrographic LIDAR）数据。整合后可获得更为连续的海底地貌视图，且数字水深数据与岸线之间的数据空白大幅缩小。本数据集以ESRI网格（ESRI grid）与GeoTIFF格式提供，以提升数据的可访问性、兼容性与实用性。