Allegheny County - NWI (National Wetlands Inventory)

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Distributor 1
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:Allegheny County Division of Computer Services Geographic Information Systems Group

Publication_Date:2000

Title:

Allegheny County - NWI (National Wetlands Inventory)

Geospatial_Data_Presentation_Form:vector digital data

Series_Information:

Publication_Information:

Publication_Place:Pittsburgh, PA

Publisher:Allegheny County Division of Computer Services Geographic Information Systems Group

Online_Linkage: https://www.pasda.psu.edu

Description:

Abstract:

NWI (National Wetlands Inventory) digital data files are records of wetlands location and classification as defined by the U.S. Fish & Wildlife Service.  This dataset is one of a series available in 7.5 minuute by 7.5 minute blocks containing ground planimetric coordinates of wetlands point, line, and area features and wetlands attributes.  When completed, the series will provide coverage for all of the contiguous United States, Hawaii, Alaska, and U.S. protectorates in the Pacific and Caribbean.  The digital data as well as the hardcopy maps that were used as the source for the digital data are produced and distributed by the U.S. Fish & Wildlife Service's National Wetlands Inventory project.  This data set is derived from the national coverage and only includes the area within the boundary of Allegheny County.

Purpose:

The data provide consultants, planners, and resource managers with information on wetland location and type. The data were collected to meet U.S. Fish & Wildlife Service's mandate to map the wetland and deepwater habitiats of the United States. This data set is derived from the national coverage and only includes the area within the boundary of Allegheny County.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:1992

Currentness_Reference:

publication date

Status:

Progress:Complete

Maintenance_and_Update_Frequency:Irregular

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate:-89.875

East_Bounding_Coordinate:-89.75

North_Bounding_Coordinate:30.5

South_Bounding_Coordinate:30.375

Keywords:

Theme:

Theme_Keyword_Thesaurus:ISO 19115.3 Topic Categories

Theme_Keyword:environment

Theme_Keyword:geoscientificInformation

Theme_Keyword:inlandWaters

Place:

Place_Keyword_Thesaurus:None

Place_Keyword:PA

Place_Keyword:Allegheny County

Place_Keyword:Pittsburgh

Place_Keyword:Southwest PA

Place_Keyword:Clairton

Place_Keyword:McKeesport

Place_Keyword:Duquesne

Place_Keyword:Western PA

Access_Constraints:Call for Details

Use_Constraints:

All parties acknowledge that the data is for informational purposes only. The existing digital data is shipped as is and there is no guarantee as to its completeness or accuracy. Allegheny County Division of Computer Services Geographic Information Systems Group is not responsible for any reliance upon said data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Allegheny County Division of Computer Services Geographic Information Systems

Contact_Position:GIS Manager

Contact_Address:

Address_Type:mailing and physical address

Address:

621 County Office Building

Address:

542 Forbes Ave.

City:Pittsburgh

State_or_Province:PA

Postal_Code:15219

Country:United States

Contact_Voice_Telephone:(412) 350-4774

Contact_Facsimile_Telephone:(412) 350-4754

Contact_Electronic_Mail_Address:GIShelp@alleghenycounty.us

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.1.1332

Cross_Reference:

Citation_Information:

Originator:Allegheny County Division of Computer Services Geographic Information Systems Group

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Attribute accuracy is tested by manual comparison of the source with hard copy printouts and/or symbolized display of the digital wetlands data on an interactive computer graphic system.  In addition, WAMS software (USFWS-NWI) tests the attributes against a master set of valid wetland attributes.

Logical_Consistency_Report:

Polygons intersecting the neatline are closed along the border.  Segments making up the outer and inner boundareies of a polygon tie end-to-end to completely enclose the area.  Line segments are a set of sequentially numbered coordinate pairs.  No duplicate features exist nor duplicate points in a data string.  Intersecting lines are separated into individual line segments at the point of intersection.  Point data are represented by two sets of coordinate pairs, each with the same coordinate values.  All nodes are represented by a single coordinate pair which indicates the beginning or end of a line segment.  The neatline is generated by connecting the four corners of the digital file, as established during initialization of the digital file.  All data crossing the neatline are clipped to the neatline and data within a specified tolerance of the neatline are snapped to the neatline.  Tests for logical consistency are performed by WAMS verification software (USFWS-NWI).

Completeness_Report:

All photo-interpretable wetlands are mapped.  In the treeless prairies, 1/4 acre wetlands are mapped.  In forested areas, small open water and emergent wetlands are mapped.  In general, the minimum mapping units is from 1 to 3 acres depending on the wetland type and the scale and emulsion of the source aerial photography.  In regions of the country where evergreen forested wetlands predominate, wetlands smaller than 3 acres may not be mapped.  Thus, a detailed  on-the ground and historical analysis of a single site may result in a revision of the wetland boundaries established through photographic interpretation.  In addition, some small wetlands and those obscured by dense forest cover may not be included in this dataset.  The NWI maps were originally created to represent wetlands throughout the United States.  Allegheny County GIS then clipped the national map data to conform to the boundary of Allegheny County.  The maps were also projected to GCS_North_American_1983, NAD_1983_StatePlane_Pennsylvania_South_FIPS_3702_Feet by Allegheny County GIS.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Horizontal positional accuracy for the digital data is tested by visual comparison of the source with hard copy plots.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value:+/- 5 feet

Vertical_Positional_Accuracy:

Quantitative_Vertical_Positional_Accuracy_Assessment:

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator:U.S. Geological Survey

Publication_Date:198811

Title:

National High Altitude Program (NHAP)

Geospatial_Data_Presentation_Form:remote-sensing image

Other_Citation_Details:

The NWI maps were originally created to represent wetlands throughout the United States. Allegheny County GIS then clipped the national map data to conform to the boundary of Allegheny County.

Source_Scale_Denominator:65000

Type_of_Source_Media:black and white aerial photograph film transparency

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:198811

Source_Currentness_Reference:

publication date

Source_Citation_Abbreviation:

NWI1a

Source_Contribution:

aerial photo from which wetlands spatial and attribute information are interpreted.

Source_Information:

Source_Citation:

Citation_Information:

Originator:U.S. Geological Survey

Publication_Date:199010

Title:

National Aerial Photography Program (NAPP)

Geospatial_Data_Presentation_Form:remote-sensing image

Other_Citation_Details:

The NWI maps were originally created to represent wetlands throughout the United States. Allegheny County GIS then clipped the national map data to conform to the boundary of Allegheny County.

Source_Scale_Denominator:40000

Type_of_Source_Media:black and white aerial photograph film transparency

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:199010

Source_Currentness_Reference:

publication date

Source_Citation_Abbreviation:

NWI1b

Source_Contribution:

aerial photo from which wetlands spatial and attribute information are interpreted.

Source_Information:

Source_Citation:

Citation_Information:

Originator:U.S. Geological Survey

Publication_Date:1979

Title:

Hickory

Geospatial_Data_Presentation_Form:map

Other_Citation_Details:

The NWI maps were originally created to represent wetlands throughout the United States. Allegheny County GIS then clipped the national map data to conform to the boundary of Allegheny County.

Source_Scale_Denominator:24000

Type_of_Source_Media:stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:1979

Source_Currentness_Reference:

publication date

Source_Citation_Abbreviation:

NWI2

Source_Contribution:

base map on which wetlands delineations are registered.

Source_Information:

Source_Citation:

Citation_Information:

Originator:U.S. Fish & Wildlife Service, National Wetlands Inventory

Publication_Date:1992

Title:

Hickory NWI map

Geospatial_Data_Presentation_Form:map

Other_Citation_Details:

The NWI maps were originally created to represent wetlands throughout the United States. Allegheny County GIS then clipped the national map data to conform to the boundary of Allegheny County.

Source_Scale_Denominator:24000

Type_of_Source_Media:stable-base material

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:1992

Source_Citation_Abbreviation:

NWI3

Source_Contribution:

source material from which compiled wetlands location and classification are digitized.

Process_Step:

Process_Description:

NWI maps are compiled through manual photinterpretation of NHAP or NAPP aerial photography, supplemented by soil surveys and field checking of wetland photo signatures.  Delineated wetland boundaries are manually transferred from interpreted photos to USGS 7.5 minute topographic quadrangle maps and then manually labeled.  Quality control steps occur throughout the photointerpretation, map compilation, and map reproduction processes.  The NWI maps were originally created to represent wetlands throughout the United States.  Allegheny County GIS then clipped the national map data to conform to the boundary of Allegheny County.  The maps were also projected to GCS_North_American_1983, NAD_1983_StatePlane_Pennsylvania_South_FIPS_3702_Feet by Allegheny County GIS.

Source_Used_Citation_Abbreviation:

NWI1a

Source_Used_Citation_Abbreviation:

NWI1b

Source_Used_Citation_Abbreviation:

NWI2

Process_Date:1992

Source_Produced_Citation_Abbreviation:

NWI3

Process_Step:

Process_Description:

During Y2K efforts of 1999-2000, data was transferred to Microsoft NT Server running ArcInfo 7 and was made available to county users across the network from a single location.

Process_Date:2000

Process_Step:

Process_Description:

Metadata Created for the Allegheny County dataset.

Process_Date:October 2006

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method:Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type:G-polygon

Point_and_Vector_Object_Count:777

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type:Point

Point_and_Vector_Object_Count:1756

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type:Label point

Point_and_Vector_Object_Count:30990

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name:Lambert Conformal Conic

Lambert_Conformal_Conic:

Lambert Conformal Conic

Standard_Parallel:39.933333

Standard_Parallel:40.966667

Longitude_of_Central_Meridian:-77.750000

Latitude_of_Projection_Origin:39.333333

False_Easting:1968500.000000

False_Northing:0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method:coordinate pair

Coordinate_Representation:

Abscissa_Resolution:0.61

Ordinate_Resolution:0.61

Planar_Distance_Units:meters

Geodetic_Model:

Horizontal_Datum_Name:North American Datum of 1927

Ellipsoid_Name:Clarke 1866

Semi-major_Axis:6378206.4

Denominator_of_Flattening_Ratio:294.9787

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label:AlleghenyCounty_NWI2000

Entity_Type_Definition:

Wetlands are lands transitional between terrestrial and aquatic systems where the water table is usually at or near the surface or the land is covered by shallow water. For purposes of this classification, wetlands must have one or more of the following three attributes" 1) at least periodically, the land supports predominantly hydrophytes; 2) the substrate is predominantly, undrained hydric soil; and 3) the substrate is non-soil and is saturated with water or covered by shallow water at some time during the growing season of each year.

Entity_Type_Definition_Source:

Cowardin, L.m., V. Carter, F. Golet, and E. LaRoe. 1979. Classification of wetlands and deepwater habitats of the United States. U.S. Fish & Wildlife Service. 103 pp.

Attribute:

Attribute_Label:FID

Attribute_Definition:

Internal feature number.

Attribute_Definition_Source:

ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label:Shape

Attribute_Definition:

Feature geometry.

Attribute_Definition_Source:

ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Coordinates defining the features.

Attribute:

Attribute_Label:AREA

Attribute:

Attribute_Label:PERIMETER

Attribute:

Attribute_Label:WTLNDNWI_

Attribute:

Attribute_Label:WTLNDNWI_I

Attribute_Definition:

The wetland classification system is hierarchical, with wetlands and deepwater habitats divided among five major systems at the broadest level.  The five systems include Marine (open ocean and associated coastline), Estuarine (salt marshes and brackish tidal water), Riverine (rivers, creeks, and streams), Lacustrine (lakes and deep ponds), and Palustrine (shallow ponds, marshes, swamps, sloughs).  Systems are further subdivided into subsystems which reflect hydrologic conditions.  Below the subsystem is the class which describes the appearance of the wetland in terms of vegetation or substrate.  Each class is further subdivided into subclasses: vegetated subclasses are descibed in terms of life form and substrate subclasses in terms of composition.  The classification system also includes modifiers to describe hydrology (water regime), soils, water chemistry (pH, salinity), and special modifiers relating to man's activities (e.g., impounded, partly drained).

Attribute_Definition_Source:

Cowardin, L.M., V. Carter, F. Golet, and E. LaRoe.  1979.  Classification of wetlands and deepwater habitats of the United States.  U.S. Fish & Wildlife Service.  103 pp.

Attribute_Domain_Values:

Codeset_Domain:

Codeset_Name:USFWS-NWI wetland classification code set

Codeset_Source:Photointerpretation Conventions for the National Wetlands Inventory, March 1990

Beginning_Date_of_Attribute_Values:March 1990

Ending_Date_of_Attribute_Values:March 1990

Attribute:

Attribute_Label:WETLAND_CL

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Allegheny County Division of Computer Services Geographic Information Systems Group

Contact_Position:GIS Manager

Contact_Address:

Address_Type:mailing and physical address

Address:

621 County Office Building

Address:

542 Forbes Avenue

City:Pittsburgh

State_or_Province:PA

Postal_Code:15219-2952

Country:USA

Contact_Voice_Telephone:412 350-4774

Contact_Facsimile_Telephone:412 350-4754

Resource_Description:Call for details.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size:66.284

Ordering_Instructions:

Call for Details

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Organization:Pennsylvania Spatial Data Access (PASDA)

Contact_Address:

Address_Type:mailing address

Address:

115 Land and Water building

City:University Park

State_or_Province:Pennsylvania

Postal_Code:16802

Country:United States

Contact_Voice_Telephone:(814) 865 - 8792

Contact_Electronic_Mail_Address:pasda@psu.edu

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.

Metadata_Reference_Information:

Metadata_Date:20080311

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Allegheny County Division of Computer Services Geographic Information Systems Group

Contact_Position:System Supervisor, GIS

Contact_Address:

Address_Type:mailing and physical address

Address:

621 County Office Building

Address:

524 Forbes Avenue

City:Pittsburgh

State_or_Province:PA

Postal_Code:15219-2952

Country:USA

Contact_Voice_Telephone:412 350-4774

Contact_Facsimile_Telephone:412 350-4754

Metadata_Standard_Name:FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version:FGDC-STD-001-1998

Metadata_Time_Convention:local time

Metadata_Extensions:

Online_Linkage:

Profile_Name:ESRI Metadata Profile