PAD-US is America's official national inventory of U.S. terrestrial and marine protected areas that are dedicated to the preservation of biological diversity and to other natural, recreation and cultural uses, managed for these purposes through legal or other effective means. This database is separated into 4 separate table assets: designation, easement, fee, and proclamation.
The 'Designation' asset includes areas expected to overlap fee-owned lands, including designations such as 'Wilderness Area', leases, agreements, and areas where the protection mechanism (Category) is 'Unknown'.
The PAD-US database strives to be a complete inventory of areas dedicated to the preservation of biological diversity, and other natural (including extraction), recreational or cultural uses, managed for these purposes through legal or other effective means. PAD-US is an aggregation of "best available" spatial data provided by agencies and organizations at a point in time. This includes both fee ownership of lands as well as management through leases, easements, or other binding agreements. The data also tracks Congressional designations, Executive designations, and administrative designations identified in management plans (e.g. Bureau of Land Management's 'Area of Environmental Concern'). These factors provide for a robust dataset offering a spatial representation of the complex U.S. protected areas network. It is important to have in mind a specific analysis question when approaching how to work with the data. As a full inventory of areas aggregated from authoritative source data, PAD-US includes overlapping designation types and small boundary discrepancies between agency datasets. Overlapping designations largely occur in the Federal estate of the 'Designation' or 'Combined' feature classes (e.g. 'Wilderness Area' over a 'Wild and Scenic River' and 'National Forest').
It is important to note the presence of overlaps, especially when trying to calculate area statistics; overlapping boundaries count the same area of ground multiple times. While minor boundary discrepancies remain, most major overlaps have been removed from the 'Fee' asset and this is the best source for overall land area calculations by land manager ('Manager Name') within the PAD-US database (data gaps limit calculations by fee ownership or 'Owner Name'). Statistics summarizing 'Public Access' or Protection Status ('GAP Status Code') by managing agency or organization from an analysis of the PAD-US 1.4 'Combined' feature class are available and will be updated with PAD-US 2.0. As the PAD-US database is a direct aggregation of source data, the PAD-US development team does not alter spatial linework. The exception is to "clip" lands data along State boundary lines (using the authoritative State boundary file provided by the U.S. Census Bureau) and remove the small segments of boundaries created by this process associated with State or local lands (not Federal or nonprofit lands). Some boundary discrepancies (or slivers) remain in the dataset. Data overlaps have been identified and are shared, along with the U.S. Census Bureau State jurisdictional boundary file, with agency data stewards to facilitate edits in source files that will then be incorporated in subsequent PAD-US versions over time. The PAD-US database is built in collaboration with many partners and data stewards. Information regarding data stewards is available.
PAD-US是美国官方的国家清单，其中包括专门用于保护生物多样性和其他自然、娱乐和文化用途的美国陆地和海洋保护区，并通过法律或其他有效手段对这些区域进行管理。该数据库分为4个独立的表格资产：指定、地役权、收费和公告。
指定 "资产包括预计与收费土地重叠的区域，包括 "荒野区 "等指定、租约、协议以及保护机制（类别）为 "未知 "的区域。
PAD-US数据库力争成为一个完整的清单，列出专门用于保护生物多样性和其他自然（包括开采）、娱乐或文化用途的区域，并通过法律或其他有效手段对这些用途进行管理。PAD-US是各机构和组织在某个时间点提供的 "最佳可用 "空间数据的汇总。这既包括土地的收费所有权，也包括通过租赁、地役权或其他有约束力的协议进行管理。该数据还跟踪国会指定、行政指定和管理计划中确定的行政指定（例如，土地管理局的 "环境关注区"）。这些因素提供了一个强大的数据集，提供了复杂的美国保护区网络的空间表现。在处理如何使用这些数据时，必须牢记一个具体的分析问题。作为一个由权威源数据汇总而成的完整的区域清单，PAD-US包括重叠的指定类型和机构数据集之间的小边界差异。重叠的指定主要发生在 "指定 "或 "组合 "特征类别的联邦遗产中（例如，"荒野区 "在 "野生和风景河 "和 "国家森林 "之上）。
注意重叠的存在是很重要的，特别是在试图计算面积统计时；重叠的边界会多次计算同一地区的地面。虽然小的边界差异仍然存在，但大多数主要的重叠部分已经从 "收费 "资产中删除，这是PAD-US数据库中按土地管理者（"管理者姓名"）计算总体土地面积的最佳来源（数据缺口限制了按收费所有权或 "所有者姓名 "计算）。通过对PAD-US 1.4 "组合 "地物类别的分析，可以得到按管理机构或组织划分的 "公共访问 "或保护状态（"GAP状态代码"）的统计数据，并将在PAD-US 2.0中更新。由于PAD-US数据库是源数据的直接汇总，PAD-US开发团队不改变空间线型。例外情况是沿州界线 "剪辑 "土地数据（使用美国人口普查局提供的权威性州界文件），并删除这一过程中产生的与州或地方土地（非联邦或非营利性土地）有关的小段边界。一些边界差异（或片段）仍然保留在数据集中。数据重叠已经被确认，并与美国人口普查局的国家管辖边界文件一起，与机构数据管理员共享，以促进源文件的编辑，然后随着时间的推移，将其纳入随后的PAD-US版本。PAD-US数据库是与许多合作伙伴和数据管理人合作建立的。有关数据管理人的信息可供查阅。
Dataset Availability
2018-09-01T00:00:00 - 2018-09-01T00:00:00
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ee.FeatureCollection("USGS/GAP/PAD-US/v20/designation")
使用说明：
The Digital Object Identifier Protected Areas Database of the United States (PAD-US) 2.0 - ScienceBase-Catalog for PAD-US 2.0 provides the persistent reference that should be used to obtain the data for use. The U.S. Geological Survey and all contributing data partners shall not be held liable for improper or incorrect use of the data described and (or) contained herein. All information is created with a specific end use or uses in mind. This is especially true for GIS data, which is expensive to produce and must be directed to meet the immediate program needs. These data were created with the expectation that they would be used for other applications; however, inappropriate uses are listed below. This list is in no way exhaustive but should serve as a guide to assess whether a proposed use can or cannot be supported by these data. For many uses, it is unlikely that PAD-US will provide the only data needed, and for uses with a regulatory outcome, authoritative agency data and field surveys should verify the result. PAD-US is recommended for users seeking basic information about more than one agency or organizations lands. Users should seek authoritative source data directly to answer questions regarding one agency or those requiring more frequent updates. Ultimately, it will be the responsibility of each data user to determine if these data can answer the question being asked. Inappropriate uses include: Using PAD-US for applications or analyses associated with one agency or a particular unit (agencies are always the best and authoritative source of their lands data and many publish updates more frequently than PAD-US). Using some data to map small areas (less than thousands of hectares), typically requiring mapping resolution at 1:24,000 scale (as boundary quality varies by data source) and using aerial photographs or ground surveys in areas where data are incomplete. Combining these data with other data finer than 1:100,000 scale to produce new hybrid maps or answer queries. Generating specific areal measurements from the data finer than the nearest thousand hectares. Representing boundaries as a legal representation for regulation or acquisition. Establishing definite occurrence or non-occurrence of any feature for an exact geographic area. Determining abundance, health, or condition of any feature. Using the data without acquiring and reviewing the metadata.
PAD-US 2.0 的数字对象标识符 https://doi.org/10.5066/P955KPLE 提供了用于获取数据以供使用的持久参考。美国地质调查局和所有提供数据的合作伙伴对本文所述和（或）包含的数据的不当或不正确使用概不负责。所有信息都是根据特定的最终用途或用途创建的。对于 GIS 数据来说尤其如此，因为 GIS 数据的生成成本很高，而且必须直接用于满足当前的程序需求。创建这些数据是为了将它们用于其他应用程序；但是，下面列出了不适当的用途。此列表绝不是详尽无遗的，但应作为评估这些数据是否可以支持拟议用途的指南。对于许多用途，PAD-US 不太可能提供所需的唯一数据，对于具有监管结果的用途，权威机构数据和现场调查应验证结果。 PAD-US 推荐用于寻求有关多个机构或组织土地的基本信息的用户。用户应直接寻求权威来源数据，以回答有关某一机构或需要更频繁更新的机构的问题。最终，每个数据用户都有责任确定这些数据是否可以回答所提出的问题。不当用途包括： 将 PAD-US 用于与一个机构或特定单位相关的应用程序或分析（机构始终是其土地数据的最佳和权威来源，并且许多机构比 PAD-US 更频繁地发布更新）。使用一些数据绘制小面积（小于数千公顷）地图，通常需要 1:24,000 比例尺的地图分辨率（因为边界质量因数据源而异），并在数据不完整的地区使用航空照片或地面调查。将这些数据与比例尺小于 1:100,000 的其他数据相结合，以生成新的混合地图或回答查询。根据比最近的千公顷更精细的数据生成特定的面积测量值。代表边界作为监管或收购的法律代表。确定特定地理区域的任何特征的确定发生或不发生。确定任何特征的丰度、健康或状况。在不获取和审查元数据的情况下使用数据。
引用：
U.S. Geological Survey (USGS) Gap Analysis Project (GAP), 2018, Protected Areas Database of the United States (PAD-US): U.S. Geological Survey data release, Protected Areas Database of the United States (PAD-US) 2.0 - ScienceBase-Catalog.
Protected Areas Database of the United States (PAD-US) 2.0 - ScienceBase-Catalog
代码：
var dataset = ee.FeatureCollection('USGS/GAP/PAD-US/v20/designation'); var styleParams = { fillColor: '000070', color: '0000be', width: 3.0, }; var regions = dataset.style(styleParams); Map.setCenter(-73, 43, 8); Map.addLayer(regions, {}, 'USGS/GAP/PAD-US/v20/designation');
其他相关：
Easement: USGS GAP PAD-US v2.0
Dataset Availability
2018-09-01T00:00:00 - 2018-09-01T00:00:00
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ee.FeatureCollection("USGS/GAP/PAD-US/v20/easement")
var dataset = ee.FeatureCollection('USGS/GAP/PAD-US/v20/easement'); var styleParams = { fillColor: '000070', color: '0000be', width: 3.0, }; var regions = dataset.style(styleParams); Map.setCenter(-73, 43, 8); Map.addLayer(regions, {}, 'USGS/GAP/PAD-US/v20/easement');
Fee: USGS GAP PAD-US v2.0
Dataset Availability
2018-09-01T00:00:00 - 2018-09-01T00:00:00
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ee.FeatureCollection("USGS/GAP/PAD-US/v20/fee")
var dataset = ee.FeatureCollection('USGS/GAP/PAD-US/v20/fee'); var styleParams = { fillColor: '000070', color: '0000be', width: 3.0, }; var regions = dataset.style(styleParams); Map.setCenter(-73, 43, 8); Map.addLayer(regions, {}, 'USGS/GAP/PAD-US/v20/fee');
Proclamation: USGS GAP PAD-US v2.0
Dataset Availability
2018-09-01T00:00:00 - 2018-09-01T00:00:00
Dataset Provider
Collection Snippet
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ee.FeatureCollection("USGS/GAP/PAD-US/v20/proclamation")
代码：
var dataset = ee.FeatureCollection('USGS/GAP/PAD-US/v20/proclamation'); var styleParams = { fillColor: '000070', color: '0000be', width: 3.0, }; var regions = dataset.style(styleParams); Map.setCenter(-73, 43, 8); Map.addLayer(regions, {}, 'USGS/GAP/PAD-US/v20/proclamation');
