Florida Breaklines

Product: Breakline data is used to hydroflatten the DEMs created for the FL Peninsular 2018 and FL Hurricane Michael 2020 Lidar Projects. Breaklines are reviewed against lidar intensity imagery to verify completeness of capture. The breaklines from the statewide collection are originally stored by county and were combined to form this statewide dataset. Dataset Description: FL Peninsular 2018 and FL Hurricane Michael 2020 Lidar projects called for the Planning, Acquisition, processing and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.35 meter. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.3 and Version 2.1, respectively. The data was developed based on a horizontal projection/datum of NAD83 (2011), State Plane, U.S. Survey Feet and vertical datum of NAVD88 (GEOID12B), U.S. Survey Feet. Lidar data was delivered as processed Classified LAS 1.4 files, formatted to individual 5000 ft x 5000 ft tiles, as tiled Intensity Imagery, and as tiled bare earth DEMs; all tiled to the same 5000 ft x 5000 ft schema.产品：本数据集所用的断裂线数据（Breakline data）用于对佛罗里达半岛2018年及佛罗里达迈克尔飓风2020年激光雷达项目生成的数字高程模型（Digital Elevation Model，DEM）开展水文整平处理。需对照激光雷达强度影像核查断裂线，以确认采集完整性。原本按县存储的全州范围采集的断裂线数据，经合并后形成本全州级数据集。 数据集描述：佛罗里达半岛2018年及佛罗里达迈克尔飓风2020年激光雷达项目，要求开展激光雷达数据的规划、采集、处理及衍生产品生产，名义脉冲间距（Nominal Pulse Spacing，NPS）设定为0.35米。两项项目的技术规范分别依据美国地质调查局（U.S. Geological Survey）国家地理空间项目基础激光雷达规范1.3版及2.1版制定。本数据集基于以下基准构建：水平投影/基准为NAD83（2011）州平面坐标系、美国测量英尺，垂直基准为NAVD88（GEOID12B）、美国测量英尺。交付的激光雷达数据包括处理后的分类LAS 1.4格式文件（按5000英尺×5000英尺分幅）、分幅强度影像及分幅裸地数字高程模型（DEM），所有数据均采用统一的5000英尺×5000英尺分幅规范。