National Wetlands Inventory for New York 2009

This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the conterminous United States. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979).

Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery.

By policy, the Service also excludes certain types of \"farmed wetlands\" as may be defined by the Food Security Act or that do not coincide with the Cowardin et al. definition. Contact the Service's Regional Wetland Coordinator for additional information on what types of farmed wetlands are included on wetland maps.

This data is hosted at, and may be downloaded or accessed from PASDA, the Pennsylvania Spatial Data Access Geospatial Data Clearinghouse http://www.pasda.psu.edu/uci/DataSummary.aspx?dataset=1456

本数据集呈现了美国本土（conterminous United States）范围内湿地与深水栖息地的分布范围、大致位置及类型。这些数据按照考瓦尔丁等人（Cowardin et al.，1979）提出的定义，勾勒出湿地与地表水体的面积范围。

由于航空影像作为湿地探测主要数据源存在局限性，部分湿地栖息地未纳入本次国家制图项目。此类栖息地包括河口潮间带、潮下带及近岸海域中的海草或沉水水生植被；部分深水礁群落（珊瑚礁或管栖蠕虫礁）也未被纳入本调查清单。这类栖息地因所处水深较大，无法通过航空影像被探测到。

根据相关政策，相关管理机构（Service）还将部分由《食品安全法案》（Food Security Act）定义的“养殖湿地”，或是不符合考瓦尔丁等人湿地定义的养殖湿地排除在外。如需了解湿地地图中纳入的养殖湿地类型详情，请联系该机构的区域湿地协调专员。

本数据集托管于宾夕法尼亚空间数据访问地理空间数据交换所（PASDA），可通过该平台下载或访问，网址为：http://www.pasda.psu.edu/uci/DataSummary.aspx?dataset=1456