AquaticsNearshore_img_WestStraitJdF_2023

This aerial imagery mosaic was collected on behalf of the Washington State Department of Natural Resources (WA DNR) by NV5 as part of a program to map the annual extent of floating kelp canopies in Washington State. There are two species of floating kelp in Washington: bull kelp (Nereocystis luetkeana; found in all surveyed areas) and giant kelp (Macrocystis pyrifera; found on the coast and Strait of Juan de Fuca). Floating kelp forests provide essential habitat for many marine species, and are of cultural and economic significance in the Northeast Pacific and around the world. Areas surveyed with aerial imagery in 2023 include the US portion of the Strait of Juan de Fuca, North Puget Sound, the San Juan Islands, part of Saratoga Passage & the Whidbey Island Basin, WA DNR managed aquatic reserves (Cherry Point AR, Cypress Island AR, and Smith & Minor Islands AR), and the Tacoma Narrows. Aerial surveys were conducted between July and September during low-tide, slack-current conditions identified by WA DNR as optimal for kelp forest monitoring, with some exceptions. This imagery has four spectral bands (Band_1 = red, Band_2 = green, Band_3 = blue, Band_4 = near-infrared) plus an alpha channel (Band_5), and was collected at 6-inch spatial resolution. A full report summarizing collection methods can be found here. Floating kelp canopies can be readily visualized using an “NGB” band combination (near-infrared, green, blue), but can also be seen in many places with standard RGB imagery (red, green, blue). Floating kelp distribution data generated using this imagery supports WA DNR's long-term kelp forest monitoring goals and mandate to ensure environmental protection of state-owned aquatic lands. Imagery from this project is publicly distributed in compressed (lossy) MrSID format for accessibility and efficient visualization, and is therefore not suitable for image classification and analysis. Please contact the WA DNR Nearshore Habitat Program about other products that are available. For more information and inquiries about products available at specific locations, please contact Danielle Claar, WA DNR, Nearshore Habitat Program at: [e-mail] or [e-mail].本航空影像镶嵌图由NV5受华盛顿州自然资源部（Washington State Department of Natural Resources，简称WA DNR）委托采集，作为华盛顿州年度漂浮海藻冠层分布制图项目的一部分。 华盛顿州境内分布有两种漂浮海藻：公牛海带（Nereocystis luetkeana，在所有调查区域均有发现）以及巨藻（Macrocystis pyrifera，分布于海岸及胡安·德富卡海峡沿岸）。 漂浮海藻林为众多海洋物种提供关键栖息地，在东北太平洋及全球范围内均具有文化与经济价值。 2023年开展航空影像调查的区域包括：胡安·德富卡海峡美国段、普吉特湾北部、圣胡安群岛、萨拉托加航道部分区域及惠德比岛盆地、WA DNR管理的水生保护区（切里角AR、赛普拉斯岛AR、史密斯与米诺群岛AR）以及塔科马海峡。 航空调查于7月至9月期间实施，采用WA DNR认定的最适宜海藻林监测的低潮、缓流条件，仅少数区域存在例外。 本影像包含4个光谱波段（波段1=红光、波段2=绿光、波段3=蓝光、波段4=近红外光）及1个alpha通道（波段5），空间分辨率为6英寸。 详细阐述采集流程的完整报告可在此处查阅。 漂浮海藻冠层可通过"NGB"波段组合（近红外、绿光、蓝光）实现便捷可视化，在多数区域也可通过标准RGB影像（红光、绿光、蓝光）识别。 基于本影像生成的漂浮海藻分布数据，可支撑WA DNR的长期海藻林监测目标，以及其保障州属水生土地环境安全的法定职责。 本项目的影像以压缩（有损）MrSID格式公开发布，以提升可访问性与高效可视化能力，因此不适用于图像分类与分析任务。 如需了解其他可用产品，请联系WA DNR近岸栖息地项目组。 若需查询特定区域的可用产品相关信息，请联系华盛顿州自然资源部近岸栖息地项目组的Danielle Claar，邮箱为[e-mail] 或 [e-mail]。