Identification_Information: Citation: Citation_Information: Originator: West Virginia GIS Technical Center Publication_Date: 20111101 Title: Statewide 100-year Floodplain Polygons for West Virginia Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: Description: Abstract: The statewide 100-year floodplain polygon data set was first compiled in 2006 from the best flood data currently available from the Federal Emergency Management Agency (FEMA). Data sources for the current version include the National Flood Hazard Layer (NFHL), Effective DFIRM databases, Preliminary DFIRM databases and Q3 digital floodplain shapefiles. Purpose: This data set was developed primarily for use in the West Virginia GIS Technical Center's web-based Flood Tool, which enables users to estimate flood risk and the "in" or "out" status of specific properties or structures relative to areas (Flood Zones) of 1% annual chance flooding. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20111101 Currentness_Reference: publication date Status: Progress: In work Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -82.698657 East_Bounding_Coordinate: -77.676669 North_Bounding_Coordinate: 40.452177 South_Bounding_Coordinate: 37.165440 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: inlandWaters Theme: Theme_Keyword_Thesaurus: FEMA NFIP Topic Category Theme_Keyword: FEMA Flood Hazard Zone Theme_Keyword: Special Flood Hazard Area Theme_Keyword: Riverine Flooding Theme_Keyword: Flood Insurance Rate Map Theme_Keyword: FIRM Theme_Keyword: DFIRM Theme_Keyword: Floodway Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: flooding Theme_Keyword: flood Theme_Keyword: floodplain Theme_Keyword: flood hazard determination tool Theme_Keyword: flood hazard determination map Theme_Keyword: advisory flood height Theme_Keyword: modeled approximate A zone Theme_Keyword: riverine flooding Theme_Keyword: flood hazard area Place: Place_Keyword_Thesaurus: None Place_Keyword: West Virginia Access_Constraints: None Use_Constraints: This data is derived from effective, preliminary and draft FEMA flood data, but is not intended to replace official FEMA publications. Acknowledgement of FEMA and the West Virginia GIS Technical Center will be appreciated in presentations or publications that make use of this data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Eric Hopkins Contact_Organization: West Virginia GIS Technical Center Contact_Position: GIS Specialist Contact_Address: Address_Type: mailing Address: West Virginia University Address: Department of Geology and Geography Address: 330 Brooks Hall Address: PO Box 6300 City: Morgantown State_or_Province: West Virginia Postal_Code: 26506 Country: USA Contact_Voice_Telephone: (304) 293-9463 Contact_Electronic_Mail_Address: ehopkins@wvu.edu Hours_of_Service: 9:00 A.M - 5:00 P.M. Data_Set_Credit: West Virginia GIS Technical Center Native_Data_Set_Environment: Microsoft Windows 7; ESRI ArcCatalog 10.0 Cross_Reference: Citation_Information: Originator: Federal Emergency Management Agency (FEMA) Publication_Date: 2008 Title: Effective Countywide DFIRMs for West Virginia Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Washington, DC, USA Publisher: Federal Emergency Management Agency Other_Citation_Details: DFIRM dates are 2008 and earlier Online_Linkage: Cross_Reference: Citation_Information: Originator: Federal Emergency Management Agency (FEMA) Publication_Date: 1988 Title: Digital Q3 Flood Data Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Washington, DC, USA Publisher: Federal Emergency Management Agency (FEMA) Online_Linkage: Cross_Reference: Citation_Information: Originator: FEMA Cooperating Technical Partners (CTPs), Flood mapping contractors Publication_Date: Unpublished Material Title: Draft DFIRM Data Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The DFIRM Database consists of countywide vector files and associated attributes produced in conjunction with the hard copy FEMA FIRM. The published effective FIRM and DFIRM maps are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the Flood Insurance Studies (FISs) and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Attribute accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic System. Independent quality control testing of FEMA's DFIRM databases was also performed. To obtain more detailed information in areas where Base Flood Elevations (BFEs) and/or floodways have been determined, users are encouraged to consult the Flood Profiles and Floodway Data and/or Summary of Stillwater Elevations tables contained within the FIS reports that accompany the Effective DFIRM databases. Users should be aware that BFEs shown in the S_BFE table represent rounded whole-foot elevations. These BFEs are intended for flood insurance rating purposes only and should not be used as the sole source of flood elevation information. Accordingly, flood elevation data presented in the FIS report must be used in conjunction with the FIRM for purposes of construction and/or floodplain management. The 1-percent-annual-chance water-surface elevations shown in theDFIRM database S_XS table match the regulatory elevations shown in the FIS report. This data set does not include cross section (XS) or BFE information. Logical_Consistency_Report: The floodplains depicted in this data have been compared to the NFHL, Effective DFIRM, Preliminary DFIRM or Q3 source material to check for alignment errors or omissions. Effective DFIRMs, including the NFHL, which is compiled from Effective DFIRM data, have been subjected, during production and after delivery, to more thorough analysis and checking for spatial agreement of features. Completeness_Report: Data contained in the DFIRM Database files reflect the content of the source materials. Features may have been eliminated or generalized on the source graphic, due to scale and legibility constraints. With new mapping, FEMA plans to maintain full detail in the spatial data it produces. However, older information is often transferred from existing maps where some generalization has taken place. Flood risk data are developed for communities participating in the National Flood Insurance Program (NFIP) for use in insurance rating and for floodplain management. Flood hazard areas are determined using statistical analyses of records of river flow, storm tides, and rainfall; information obtained through consultation with the communities; floodplain topographic surveys; and hydrological and hydraulic analysis. Both detailed and approximate analyses are employed. Generally, detailed analyses are used to generate flood risk data only for developed or developing areas of communities. For areas where little or no development is expected to occur, FEMA uses approximate analyses to generate flood risk data. Typically, only drainage areas that are greater than one square mile are studied. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal accuracy of Effective DFIRM data was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed. Lineage: Process_Step: Process_Description: Dataset compiled from Effective DFIRM, Draft DFIRM, and Q3 flood hazard polygon data Process_Date: 2006 Source_Used_Citation_Abbreviation: DFIRM, Draft, Q3 Process_Step: Process_Description: Incorporated new Effective DFIRM and Draft DFIRM data. Zone A, Zone AE, and Zone AO polygons were copied into the existing statewide data set. Process_Date: 200807 Source_Used_Citation_Abbreviation: DFIRM, Draft DFIRM, Q3 Process_Step: Process_Description: Incorporated new Effective and Preliminary DFIRM data. Zone A, Zone AE, and Zone AO polygons were copied into the existing statewide data set. Process_Date: 20100826 Source_Used_Citation_Abbreviation: DFIRM, Preliminary DFIRM, Draft DFIRM, Q3 Process_Step: Process_Description: Incorporated new model-based Approximate A Zone (Advisory Flood Height) data from AMEC Earth and Environmental for five counties into the new statewide floodplain data set: Marion, Harrison, Mineral, Mingo and Wayne. The floodplain polygons in these five counties match the water surface and depth grid raster data provided by AMEC and incorporated into the WV Flood Hazard Determination Tool. Process_Date: 2010826 Source_Used_Citation_Abbreviation: modeled Approximate A Zone, Advisory Flood Height (AFH) Note that we need to add source elements that describe the items listed above under Source_Used_Citation. 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: 2052 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 17 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -81.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.001024 Ordinate_Resolution: 0.001024 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum of 1988 Altitude_Resolution: 1.000000 Altitude_Distance_Units: feet Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: VECTUSR.femaAll5 Entity_Type_Definition: Location and attributes for floodplain polygons Entity_Type_Definition_Source: FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at ) Detailed_Description: Entity_Type: Entity_Type_Label: OBJECTID Entity_Type_Definition: Internal feature number Entity_Type_Definition_Source: ESRI Detailed_Description: Entity_Type: Entity_Type_Label: ZONE Entity_Type_Definition: Special Flood Hazard Area (SFHA) Entity_Type_Definition_Source: DFIRM, Draft, Q3 Detailed_Description: Entity_Type: Entity_Type_Label: SHAPE Entity_Type_Definition: Feature geometry Entity_Type_Definition_Source: ESRI Detailed_Description: Entity_Type: Entity_Type_Label: TYPE Entity_Type_Definition: Data source, i.e. Effective, Preliminary, Draft, Q3 Entity_Type_Definition_Source: WVGISTC Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: West Virginia GIS Technical Center Contact_Person: Eric Hopkins Contact_Address: Address_Type: mailing Address: West Virginia University Address: Department of Geology and Geography Address: 330 Brooks Hall Address: PO Box 6300 City: Morgantown State_or_Province: West Virginia Postal_Code: 26506 Country: USA Contact_Voice_Telephone: (304) 293-9463 Contact_Electronic_Mail_Address: ehopkins@wvu.edu Hours_of_Service: 9:00 A.M - 5:00 P.M. Contact_Instructions: The WVGISTC can assist with data download or data use issues. Specific data requests should be directed to FEMA via the Map Service Center (http://msc.fema.gov). Such requests must include the full name of the community or county and the FIRM panel number(s) or the 7.5- minute series quadrangle sheet area(s) covered by the request. FIRM panel numbers can be found by using the WV Flood Tool (http://mapwv.gov/flood). Distribution_Liability: No warranty expressed or implied is made by the West Virginia GIS Technical Center regarding the utility of the data on any other system nor shall the act of distribution constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ESRI Shapefile Format_Version_Number: 1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Fees: none Metadata_Reference_Information: Metadata_Date: 20100914 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: West Virginia GIS Technical Center Contact_Person: Eric Hopkins Contact_Address: Address_Type: mailing Address: West Virginia University Address: Department of Geology and Geography Address: 330 Brooks Hall Address: PO Box 6300 City: Morgantown State_or_Province: West Virginia Postal_Code: 26506 Country: USA Contact_Voice_Telephone: (304) 293-9463 Contact_Electronic_Mail_Address: ehopkins@wvu.edu Hours_of_Service: 9:00 A.M - 5:00 P.M. Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: none Metadata_Use_Constraints: none Metadata_Extensions: Online_Linkage: Profile_Name: ESRI Metadata Profile