OC Natural Area 2004

<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>A spatial representation of potential natural areas (PNAs) which are defined as places on the landscape dominated by native vegetation that have various levels of potential for harboring high quality natural areas and unique natural features. In addition, these areas may provide critical ecological services such as maintaining water quality and quantity, soil development and stabilization, pollination, wildlife corridors, migratory bird stopover sites, sources of genetic diversity, and floodwater retention. It should be noted, however, that the actual ecological value of the PNAs can only be truly ascertained through on the ground biological surveys.</SPAN></P><P><SPAN>The polygons contained in this feature class were derived from data developed for the 2004 Oakland County Potential Conservation/Natural Areas Report. Digital Landcover, orthophotography, and USGS quadrangle maps were the main sources used to identify each natural area. Once captured, the features were scored and ranked using criteria based on several universally accepted principals of biodiversity conservation. Each feature was assigned a priority classification of One, Two, or Three. Key attributes include Priority, EnhancedPriority and TotalScore. "Priority" and "EnhanedPriority" are a reflection of quality and an indication of the level of priority to retain or conserve the natural state of the identified area.</SPAN></P><P><SPAN>The term "potential natural area" is not to be confused with the legal term "dedicated Natural Area" as described in Part 351, Wilderness and Natural Areas, of the Natural Resources and Environmental Protection Act of 1994 which gives land special legal protection.</SPAN></P><P><SPAN>The 2004 Oakland County Potential Conservation/Natural Areas Report prepared by: John Paskus, Associate Program Leader - Conservation Helen Enander, Information Technologist I Michigan Natural Features Inventory P.O. Box 30444 8th Floor, Mason Bldg. Lansing, MI 48909-7944 should be distributed with the NaturalArea2004 data. This document provides essential information for the attributes and procedures used to create the features in the dataset. </SPAN></P></DIV></DIV></DIV>本数据集为潜在自然区域（Potential Natural Areas, PNAs）的空间表达。潜在自然区域指景观中以原生植被为主的区域，具备不同程度的潜力以孕育高质量自然区域与独特自然景观。此外，此类区域可提供关键生态服务，包括维持水质与水量、土壤发育与固持、授粉服务、野生动物迁徙廊道、候鸟停歇地、遗传多样性源以及洪水滞留功能。但需注意，潜在自然区域的实际生态价值仅能通过实地生物调查得以真正确认。 本要素类中的多边形矢量数据源自《2004年奥克兰县潜在保护/自然区域报告》的研发成果。数字土地覆盖数据、正射影像以及美国地质调查局（USGS）矩形分幅地形图为识别各自然区域的主要数据源。要素提取完成后，研究团队基于多项国际公认的生物多样性保护原则制定评分标准，对各要素进行打分与分级。每个要素均被赋予一级、二级或三级的优先级分类。核心属性字段包括"Priority"（优先级）、"EnhancedPriority"（增强优先级，原文笔误为EnhanedPriority）与"TotalScore"（总评分）。其中，"Priority"与"EnhancedPriority"可反映区域质量，同时体现保留或保护该识别区域自然状态的优先级等级。 需注意，"潜在自然区域"这一术语不可与1994年《自然资源与环境保护法》第351章"荒野与自然区域"中定义的法定"专属自然区域（dedicated Natural Area）"混淆，后者可为土地提供特殊法律保护。 本数据集配套的《2004年奥克兰县潜在保护/自然区域报告》由以下人员编制：保护项目副主管约翰·帕斯克（John Paskus）、一级信息技术员海伦·恩安德（Helen Enander），依托密歇根自然特征名录（Michigan Natural Features Inventory）完成。报告发布地址为：密歇根州兰辛市梅森大厦8层，邮政信箱30444，邮编48909-7944。该文档为本数据集要素的属性信息与制作流程提供了必要的技术说明。