FWS National Realty Approved Acquisition Boundaries

This data layer depicts the external boundaries of areas approved for acquisition of lands and waters by the U.S. Fish and Wildlife Service (USFWS) in North America, U.S. Trust Territories and Possessions from willing sellers. This boundary does not represent the lands and waters administered by the USFWS. That data is found in the U.S. Fish and Wildlife Service National Realty Tracts view layer. The primary source for this information is the USFWS Division of Realty. Data can also be downloaded from ServCat, the FWS Catalog. Go to this link for downloadable cadastral data: https://iris.fws.gov/APPS/ServCat/SavedSearch/Profile/2674 This dataset contains features which have been modified from the source regional data. For select features, geometry has been generalized up to a specified threshold to reduce a high number of vertices in large multipart polygons and improve web service performance. Currently five or fewer features are generalized in each dataset, with the generalization tolerance varying from 1m up to 30m per feature, as required. To further improve web service performance: OGC geometry problems were automatically fixed where possible, true curves were densified, and the data were projected into the WGS 1984 Web Mercator Auxiliary Sphere projection. Sync is enabled, but editing is disabled. POC for these data are: [e-mail]本数据图层描绘了美国鱼类及野生动物管理局（U.S. Fish and Wildlife Service, USFWS）在北美、美国托管领土及属地范围内，从自愿售卖方处获批收购土地与水域的区域外部边界。此边界并不代表USFWS所管理的土地与水域，相关数据可通过USFWS全国不动产地块视图图层获取。 本信息的主要来源为USFWS不动产司。数据亦可从FWS目录ServCat下载，可下载地籍数据的链接为：https://iris.fws.gov/APPS/ServCat/SavedSearch/Profile/2674 本数据集包含从源区域数据修改而来的要素。针对部分要素，已将几何图形简化至指定阈值，以减少大型多部分多边形中的顶点数量，提升Web服务性能。当前每个数据集中被简化的要素不超过5个，且根据需求，每个要素的简化容差范围为1米至30米不等。 为进一步优化Web服务性能：已在可行范围内自动修复OGC几何问题，对真实曲线进行顶点加密，并将数据投影至WGS 1984 Web Mercator Auxiliary Sphere投影坐标系。本数据集已启用同步功能，但禁用编辑。相关数据的联系人邮箱为：[e-mail]