Vegetation - Pickel Meadows Wildlife Area [ds3197]

The California Department of Fish and Wildlife (CDFW) created a fine-scale vegetation map of the Pickel Meadows meadow complex and adjacent uplands. CDFW conducted field reconnaissance assistance for this project, as well as accuracy assessment (AA) field data collection. CDFW’s Vegetation Classification and Mapping Program (VegCAMP) provided in-kind service to allocate and score the AA. The mapping study area consists of approximately 2,169 acres of Mono County. Work was performed on the project between 2021 and 2025. Field samples were collected between June 21 and June 25, 2021. The primary purpose of the project was to further CDFW’s goal of developing fine-scale digital vegetation maps as part of the California Biodiversity Initiative Roadmap of 2018. CDFW's VegCAMP developed the floristic vegetation classification used for the project based on existing vegetation types described in the Manual of California Vegetation Online (CNPS 2021) and the classification for the Modoc ecoregion (Boul et al. 2021). The floristic classification follows protocols compliant with the Federal Geographic Data Committee (FGDC) and National Vegetation Classification Standards (NVCS). The vegetation classification and mapping report with the vegetation key can be downloaded here: https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=237989. The vegetation map was produced applying heads-up digitizing techniques using a 2018 base of one-meter National Agricultural Imagery Program (NAIP) imagery (true-color and color infrared), in conjunction with ancillary data and imagery sources. Map polygons are assessed for Vegetation Type, Percent Cover, Exotics, Development Disturbance, and other attributes. The minimum mapping unit (MMU) is 1 acre, with the exception of wetland and riparian types, which have an MMU of ½ acre. Field reconnaissance and accuracy assessment enhanced map quality. There was a total of 33 mapping classes. The overall Fuzzy Accuracy Assessment rating for the final vegetation map,at the Alliance and Group levels, is XXXX percent. Overall users' map accuracy was 89.3% and overall producers' accuracy was 89.6%.加利福尼亚鱼类与野生动物部（California Department of Fish and Wildlife, CDFW）完成了皮克尔草甸群（Pickel Meadows meadow complex）及邻近高地的精细植被制图。该部门为本项目提供了野外勘测协助，并负责精度评估（Accuracy Assessment, AA）野外数据的采集工作。CDFW下属的植被分类与制图项目组（Vegetation Classification and Mapping Program, VegCAMP）提供了实物服务，用于精度评估的分配与评分工作。 本次制图研究区域位于莫诺县（Mono County），总面积约2169英亩。项目执行周期为2021年至2025年，野外样本采集工作于2021年6月21日至6月25日期间完成。 本项目的核心目标是推进CDFW开发精细尺度数字化植被图的工作，该工作作为2018年《加州生物多样性倡议路线图》的组成部分。CDFW的VegCAMP团队基于《加州植被在线手册》（Manual of California Vegetation Online, CNPS 2021）中记载的现有植被类型，以及莫多克生态区分类体系（Boul等，2021），开发了本项目所用的植物区系植被分类体系。该分类体系遵循联邦地理数据委员会（Federal Geographic Data Committee, FGDC）与国家植被分类标准（National Vegetation Classification Standards, NVCS）的相关规程。 包含植被检索表的植被分类与制图报告可通过以下链接下载：https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=237989。 本次植被图的制作采用了抬头数字化（heads-up digitizing）技术，以2018年发布的1米分辨率美国农业部农业影像计划（National Agricultural Imagery Program, NAIP）影像（真彩色与彩红外影像）作为底图，并结合辅助数据与其他影像源完成。地图多边形需评估植被类型、盖度、外来物种占比、开发干扰及其他属性信息。最小制图单元（Minimum Mapping Unit, MMU）为1英亩，湿地与河岸类型除外，其最小制图单元为0.5英亩。野外勘测与精度评估工作有效提升了地图质量。本次制图共涵盖33个分类类别。最终植被图在群丛（Alliance）与群系（Group）级别上的模糊精度评估（Fuzzy Accuracy Assessment）总得分为XXXX%。地图的总体用户精度为89.3%，总体生产者精度为89.6%。