Pennsylvania Spatial Data Access

Abstract:

The National Hydrography Dataset Plus High Resolution NHDPlus HR is a geospatial model for the flow of water across the landscape and through the stream network. The dataset is built using data at 1 : 24,000 scale or better. The dataset expands on the NHD with additional attribute data. This layer uses the NHDPlus HR to create a Pennsylvaniawide Strahler stream order database. The layer includes unique identifiers for stream reaches Reach Code to allow joins with other stream datasets built off the NHD. PA Department of Environmental Protections non-attaining, impaired, streams layer 202301 was joined in this manner. The Stream Integrated List is provided as two separate layers determined if the stream is attaining or not attaining its designated uses. DEP Streams Integrated List layer is maintained by the PADEP Office of Water Management, Bureau of Water Supply and Wastewater Management, Water Quality Assessment and Standards Division. The layer is based on the High Resolution National Hydrography Dataset. Additional update information is provided by Bureau of Watershed Management, Water Use Planning Division.

Use_Constraints:

None.  Acknowledgment of the originating agencies would
be appreciated in products derived from these data.

Address:

610 N. 3rd St, Suite 301

Attribute_Definition:

Internal feature number.

Attribute_Definition_Source:

ESRI

Attribute_Definition:

Feature geometry.

Attribute_Definition_Source:

ESRI

Attribute_Definition:

Length of feature in internal units.

Attribute_Definition_Source:

ESRI

Entity_and_Attribute_Overview:

The National Hydrography Dataset is a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed bodies of water, paths through which water flows, and related entities.  The information encoded about features includes a feature date, classification by type, other characteristics, a unique common identifier, the feature length or area, and (rarely) elevation of the surface of water pools and a description of the stage of the elevation.  For reaches, encoded information includes a reach code.  Names and their identifiers in the Geographic Names Information System, are assigned to most feature types.  The direction of flow is encoded for networked features.  The data also contains relations that encode metadata, and information that supports the exchange of future updates and improvements to the data.  The names and  definitions of all feature types, characteristics, and values are in the Standards for National Hydrography Dataset:  Reston, Virginia, U.S. Geological Survey, 1999.  The document is available online through http://mapping.usgs.gov/standards/.

Entity_and_Attribute_Detail_Citation:

The names and definitions of all feature types, characteristics, and values are in U.S. Geological Survey, 1999, Standards for National Hydrography Dataset High Resolution:  Reston, Virginia, U.S. Geological Survey.  The document is available online through http://mapping.usgs.gov/standards/.  Information about tables and fields in the data are available from the user documentation for the National Hydrography Dataset at http://nhd.usgs.gov.  The National Map - Hydrography Fact Sheet is also available at: http://erg.usgs.gov/isb/pubs/factsheets/fs06002.html.

Address:

115 Land and Water Building

Distribution_Liability:

The USER shall indemnify, save harmless, and, if requested, defend those parties involved with the development and distribution of this data, their officers, agents, and employees from and against any suits, claims, or actions for injury, death, or property damage arising out of the use of or any defect in the FILES or any accompanying documentation. Those parties involved with the development and distribution excluded any and all implied warranties, including warranties or merchantability and fitness for a particular purpose and makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance. Those parties involved with the development and distribution of this data will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.

Address:

115 Land and Water Building

NHD Stream Order - Pennsylvania