Identification_Information: Citation: Citation_Information: Originator: West Virginia GIS Technical Center Publication_Date: 20130410 Title: Statewide 100-year Floodplain Polygons for West Virginia Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polygon) Publication_Information: Publication_Place: Morgantown, WV Publisher: West Virginia GIS Technical Center Online_Linkage: http://wvgis.wvu.edu/data/dataset.php?ID=373 Online_Linkage: http://www.wvgis.wvu.edu 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: 20130410 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -82.64474294 East_Bounding_Coordinate: -77.725291015 North_Bounding_Coordinate: 40.638810501 South_Bounding_Coordinate: 37.206718893 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 Theme: Theme_Keyword_Thesaurus: EPA GIS Keyword Thesaurus Theme_Keyword: Disaster Theme_Keyword: Emergency Theme_Keyword: Hazards Theme_Keyword: Risk Theme_Keyword: Surface Water Theme_Keyword: Water 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 City: Morgantown State_or_Province: West Virginia Postal_Code: 26506 Contact_Voice_Telephone: (304) 293-9463 Contact_Electronic_Mail_Address: ehopkins@wvu.edu Data_Set_Credit: West Virginia GIS Technical Center Native_Data_Set_Environment: Environment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 10.1 (Build 3035) Service Pack 1 (Build 3143) Cross_Reference: Citation_Information: Originator: Federal Emergency Management Agency (FEMA) Publication_Date: 20121231 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: http://msc.fema.gov 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: http://www.fema.gov/hazard/map/q3.shtm 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: ftp://ftp.wvgis.wvu.edu/pub/Clearinghouse/water_resources/DFIRM-lite 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. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The DFIRM Databases used to compile this data set consist of countywide vector files and associated attributes produced in conjunction with the hardcopy 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 FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Vertical accuracy of the countywide DFIRM databases 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 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 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 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. This will not be the case in counties where the DFIRM became effective before the new Approximate A Zone data was published. Process_Date: 20100826 Process_Step: Process_Description: Incorporated new Effective and Preliminary DFIRM data for eight counties: Effective: Barbour, Doddridge, Nicholas, Pocahontas; Preliminary: Greenbrier, Roane, Webster, Wirt. Zone A, Zone AE, and Zone AO polygons were copied into the existing statewide data set. Process_Date: 20120206 Process_Step: Process_Description: Incorporated new model-based Approximate A Zone (Advisory Flood Height) data from AMEC Earth and Environmental for eight counties into the new statewide floodplain data set: Fayette, Greenbrier, Kanawha, Logan, McDowell, Mercer, Raleigh, Wyoming. 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. This will not be the case in counties where the DFIRM became effective before the new Approximate A Zone data was published. Process_Date: 20120206 Process_Step: Process_Description: Incorporated new Effective and Preliminary DFIRM data for seventeen counties: Effective: Greenbrier, Harrison, Marion, Mingo, Preston, Putnam, Ritchie, Roane, Taylor, Webster, Wirt; Preliminary: Boone, Clay, Lincoln, Mason, Pleasants, Wood. Zone A, Zone AE, and Zone AO polygons were copied into the existing statewide data set. Process_Date: 20130228 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: 2436 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: WGS 1984 Web Mercator Auxiliary Sphere (ESRI Full Name: WGS_1984_Web_Mercator_Auxiliary_Sphere) Transverse_Mercator: Scale_Factor_at_Central_Meridian: 1.0 Longitude_of_Central_Meridian: 0.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 0.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.6096 Ordinate_Resolution: 0.6096 Planar_Distance_Units: Meter Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The DFIRM Database is made up of several data themes containing both spatial and attribute information. These data together represent the current flood risk for the subject area as identified by FEMA. The attribute tables include SFHA locations, flood zone designations, BFEs, political entities, cross-section locations, FIRM panel information, and other data related to the NFIP. Entity_and_Attribute_Detail_Citation: West Virginia GIS Technical Center and FEMA Guidelines and Specifications for Digital Flood Mapping. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: West Virginia GIS Technical Center Contact_Person: Eric Hopkins Contact_Position: GIS Specialist Contact_Address: Address_Type: mailing and physical Address: WVU Dept. of Geology and Geography Address: Brooks Hall rm 330 City: Morgantown State_or_Province: WV Postal_Code: 26506-6300 Contact_Voice_Telephone: (304) 293-9463 Contact_Electronic_Mail_Address: Eric.Hopkins@mail.wvu.edu Resource_Description: Downloadable Data Distribution_Liability: Although these data have been processed successfully on a computer system at the West Virginia GIS Technical Center, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data to evaluate data set limitations, restrictions or intended use. The West Virginia GIS Technical Center shall not be held liable for improper or incorrect use of the data described and/or contained herein. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Vector Digital Data Set (Polygon) Format_Version_Number: 1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Fees: none Metadata_Reference_Information: Metadata_Date: 20130422 Metadata_Future_Review_Date: 20140914 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: West Virginia GIS Technical Center Contact_Person: Eric Hopkins Contact_Position: GIS Specialist Contact_Address: Address_Type: mailing and physical Address: WVU Dept. of Geology and Geography Address: Brooks Hall rm 330 City: Morgantown State_or_Province: WV Postal_Code: 26506-6300 Contact_Voice_Telephone: (304) 293-9463 Contact_Electronic_Mail_Address: Eric.Hopkins@mail.wvu.edu 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: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile