Hyperspectral imagery for Hog Island, VA, 2013

High resolution hyperspectral imagery Hog Island, Northampton County, VA, collected on May 26, 2013 on behalf of the USACE Engineer Research and Development Center using the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities.  LiDAR data is provided as a separate VCRLTER dataset. Four data entities are included here: RADIANCE data across (a) 48 and (b) 96 spectral bands at 1 and 2 meters spatial resolution, respectively; and atmospherically-corrected FLAASH reflectance data (c & d) across the same bands and resolutions.  The 48-band data cover the spectral range of 369.1 to 1040.0 nm (+/- 7.1 nm) and the 96-band data cover a similar range of 360.4 to 1038.4 nm (+/- 3.6 nm).  Individual bands are described in the metadata for each data entity. Both the FLAASH reflectance and the radiance data have had a water mask applied to them; therefore no hyperspectral data is currently available for nearshore and offshore environments nor for deeper marsh creeks and ponds. FLAASH zip files also include the corresponding ENVI template files containing the FLAASH Atmospheric Model Input Parameters.

本数据集为2013年5月26日由美国陆军工程兵团工程研究与发展中心（USACE Engineer Research and Development Center）委托，使用海岸带测绘与成像激光雷达（Coastal Zone Mapping and Imaging Lidar, CZMIL）系统，于弗吉尼亚州北安普顿郡霍格岛采集的高分辨率高光谱影像。CZMIL将具备地形与测深功能的激光雷达（LiDAR）传感器、数码相机以及高光谱成像仪集成至单一遥感平台，用于海岸带测绘与海图编制工作。激光雷达数据以独立的VCRLTER数据集形式单独提供。本次数据集包含四类数据实体：分别为空间分辨率1米、覆盖48个光谱波段的（a）辐射亮度数据，以及空间分辨率2米、覆盖96个光谱波段的（b）辐射亮度数据；还有对应波段与分辨率下、经FLAASH进行大气校正后的反射率数据（c与d）。48波段数据的光谱覆盖范围为369.1至1040.0 nm（±7.1 nm），96波段数据的光谱覆盖范围与之相近，为360.4至1038.4 nm（±3.6 nm）。各数据实体的元数据中附有各波段的详细说明。FLAASH反射率数据与辐射亮度数据均已施加水体掩膜，因此当前数据集不包含近岸、远海环境以及深层沼泽溪流与池塘的高光谱数据。FLAASH压缩包还包含对应的ENVI模板文件，其中内置了FLAASH大气模型输入参数。