AquaticsNearshore_img_SanJuanIs_2024

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 along the Pacific coast and Strait of Juan de Fuca). Floating kelp forests provide essential habitat for many marine species and are culturally and economically significant in the Northeast Pacific and around the world. Areas surveyed with aerial imagery in 2024 include the US side of the Strait of Juan de Fuca, Northern Pacific Coast, Admiralty Inlet, North Puget Sound, the San Juan Islands, Saratoga Passage and 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 August and September during low-tide, slack-current conditions identified by WA DNR as optimal for kelp forest monitoring. 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 based on 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 data products that are available to be shared. 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带冠层分布范围测绘项目的一部分。华盛顿州境内分布有两种漂浮海带：公牛海带（Nereocystis luetkeana，在所有调查区域均有发现）与巨藻（Macrocystis pyrifera，分布于太平洋沿岸及胡安·德富卡海峡）。漂浮海带林为诸多海洋物种提供关键栖息地，在东北太平洋乃至全球范围内均具备重要的文化与经济价值。2024年航空影像调查区域涵盖胡安·德富卡海峡美方水域、北太平洋沿岸、阿德默勒尔蒂湾、普吉特湾北部、圣胡安群岛、萨拉托加航道与惠德比岛盆地，以及WA DNR管理的水生保护区（切里角AR、赛普拉斯岛AR、史密斯与米诺岛AR）与塔科马峡湾。航空调查于8月至9月间开展，作业时段为WA DNR认定的最适宜海带林监测的低潮、缓流条件。该影像包含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。完整采集方法总结报告可于此处查阅。漂浮海带冠层可通过「NGB」波段组合（近红外、绿光、蓝光）便捷可视化，多数区域亦可通过标准RGB影像（红光、绿光、蓝光）观测到。基于该影像生成的漂浮海带分布数据，可助力WA DNR达成其长期海带林监测目标，以及履行保障国有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格式公开分发，以提升可访问性与可视化效率，因此不适用于图像分类与分析工作。如需了解其他可共享的数据产品，请联系WA DNR近岸栖息地项目组。如需获取特定区域相关产品的更多信息或咨询，请联系WA DNR近岸栖息地项目组的Danielle Claar，联系方式：[e-mail] 或 [e-mail]。