York County HYDRO Floodplains

• 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:Federal Emergency Management Agency

Publication_Date:2018

Title:

York County HYDRO Floodplains

Edition:Version 1.1.1.0

Geospatial_Data_Presentation_Form:FEMA-NFHL

Publication_Information:

Publication_Place:Washington, D.C.

Publisher:Federal Emergency Management Agency

Description:

Abstract:

The National Flood Hazard Layer (NFHL) is a compilation of GIS data that comprises a nationwide digital Flood Insurance Rate Map. The GIS data and services are designed to provide the user with the ability to determine the flood zone, base flood elevation, and floodway status for a particular location. It also has information about the NFIP communities, map panels, cross sections, hydraulic structures, Coastal Barrier Resource System, and base maps such as road, stream, and public land survey data. Through flood studies, FEMA produces Flood Insurance Study Reports, FIRM Panels, and FIRM Databases. FIRM Databases that become effective are incorporated into the NFHL. Updates to the NFHL are issued through Letters of Map Revision (LOMRs) and Letters of Map Amendment (LOMAs). Continuously updated, the NFHL serves as a Digital Flood Insurance Rate Map representing the current effective flood data for those communities where maps have been digitized. NFHL data can be viewed with widely available GIS software, including freely available programs that work with GIS shapefiles. For more information on the NFHL, see the online resources referenced herein. ___Using base maps:___ The minimum horizontal positional accuracy for base map hydrographic and transportation features used with the NFHL is the NSSDA radial accuracy of 38 feet. ___Letter of Map Amendment (LOMA) point locations___ are approximate. The location of the LOMA is referenced in the legal description of the letter itself. LOMA points can be viewed in the NFHL Interactive Map on the FEMA GeoPlatform.

Purpose:

The FIRM is the basis for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). Insurance applications include enforcement of the mandatory purchase requirement of the Flood Disaster Protection Act, which "... requires the purchase of flood insurance by property owners who are being assisted by Federal programs or by Federally supervised, regulated or insured agencies or institutions in the acquisition or improvement of land facilities located or to be located in identified areas having special flood hazards, " Section 2 (b) (4) of the Flood Disaster Protection Act of 1973. In addition to the identification of Special Flood Hazard Areas (SFHAs), the risk zones shown on the FIRMs are the basis for the establishment of premium rates for flood coverage offered through the NFIP. The FIRM Database presents the flood risk information depicted on the FIRM in a digital format suitable for use in electronic mapping applications. The FIRM Database serves to archive the information collected during the Flood Risk Project.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:

Currentness_Reference:

Publication Date

Status:

Progress:In work

Maintenance_and_Update_Frequency:Monthly

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate:-77.102901

East_Bounding_Coordinate:-76.229332

North_Bounding_Coordinate:40.228228

South_Bounding_Coordinate:39.712828

Keywords:

Theme:

Theme_Keyword_Thesaurus:NGDA Portfolio Themes

Theme_Keyword:National Geospatial Data Asset

Theme_Keyword:Elevation Theme

Theme_Keyword:NGDA

Theme:

Theme_Keyword_Thesaurus:ISO 19115 Topic Category

Theme_Keyword:transportation

Theme_Keyword:hydrology

Theme_Keyword:elevation

Theme_Keyword:inlandWaters

Theme_Keyword:environment

Theme_Keyword:structure

Theme:

Theme_Keyword_Thesaurus:FEMA NFIP Topic Category

Theme_Keyword:SFHA

Theme_Keyword:Flood Insurance Rate Map

Theme_Keyword:Coastal Flooding

Theme_Keyword:NFIP

Theme_Keyword:FIRM Database

Theme_Keyword:FEMA Flood Hazard Zone

Theme_Keyword:Floodway

Theme_Keyword:FIRM

Theme_Keyword:Base Flood Elevation

Theme_Keyword:Special Flood Hazard Area

Theme_Keyword:CBRS

Theme_Keyword:Coastal Barrier Resources System

Theme_Keyword:Riverine Flooding

Theme:

Theme_Keyword_Thesaurus:ISO 19115 Topic Categories

Theme_Keyword:transportation

Theme_Keyword:inlandWaters

Theme_Keyword:structure

Theme_Keyword:environment

Theme_Keyword:elevation

Place:

Place_Keyword_Thesaurus:None

Place_Keyword:Illinois

Place_Keyword:Puerto Rico

Place_Keyword:North Carolina

Place_Keyword:Massachusetts

Place_Keyword:Louisiana

Place_Keyword:Oregon

Place_Keyword:Texas

Place_Keyword:Wisconsin

Place_Keyword:Pennsylvania

Place_Keyword:Kansas

Place_Keyword:North Dakota

Place_Keyword:Florida

Place_Keyword:Michigan

Place_Keyword:Washington

Place_Keyword:Delaware

Place_Keyword:Virginia

Place_Keyword:Kentucky

Place_Keyword:Connecticut

Place_Keyword:Northern Mariana Islands

Place_Keyword:Rhode Island

Place_Keyword:Marshall Islands

Place_Keyword:New York

Place_Keyword:Montana

Place_Keyword:South Dakota

Place_Keyword:Vermont

Place_Keyword:Oklahoma

Place_Keyword:U.S. Minor Islands

Place_Keyword:South Carolina

Place_Keyword:Indiana

Place_Keyword:Utah

Place_Keyword:Minnesota

Place_Keyword:American Samoa

Place_Keyword:Nevada

Place_Keyword:Wyoming

Place_Keyword:Nebraska

Place_Keyword:Mississippi

Place_Keyword:District of Columbia

Place_Keyword:New Hampshire

Place_Keyword:Arkansas

Place_Keyword:New Jersey

Place_Keyword:Tennessee

Place_Keyword:Arizona

Place_Keyword:Alabama

Place_Keyword:California

Place_Keyword:Ohio

Place_Keyword:Maryland

Place_Keyword:Federated State of Micronesia

Place_Keyword:Iowa

Place_Keyword:Idaho

Place_Keyword:Virgin Islands

Place_Keyword:Guam

Place_Keyword:Alaska

Place_Keyword:New Mexico

Place_Keyword:Georgia

Place_Keyword:Maine

Place_Keyword:Colorado

Place_Keyword:Palau

Place_Keyword:West Virginia

Place_Keyword:Missouri

Place_Keyword:Hawaii

Access_Constraints:None

Use_Constraints:

The hardcopy FIRM and FIRM Database and the accompanying FIS are the official designation of SFHAs and Base Flood Elevations (BFEs) for the NFIP. For the purposes of the NFIP, changes to the flood risk information published by FEMA may only be performed by FEMA and through the mechanisms established in the NFIP regulations (44 CFR Parts 59-78). These digital data are produced in conjunction with the hardcopy FIRMs and generally match the hardcopy map exactly. Acknowledgement of FEMA would be appreciated in products derived from these data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Federal Emergency Management Agency

Contact_Address:

Address_Type:mailing

Address:

500 C Street, S.W.

City:Washington

State_or_Province:District of Columbia

Postal_Code:20472

Country:US

Contact_Voice_Telephone:1-877-336-2627

Contact_Electronic_Mail_Address:FEMAMapSpecialist@riskmapcds.com

Native_Data_Set_Environment:

Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.4.1.5686

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The NFHL incorporates all FIRM Databases published by FEMA and any LOMRs that have been issued against those databases since their publication date. The NFHL consists of vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and FIRM Database 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 Standards for Flood Risk Analysis and Mapping. 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 the individual FIRM Database components of the NFHL 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 individual FIRM Database components of the NFHL. Users should be aware that BFEs shown in the S_BFE table may 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 the S_XS table match the regulatory elevations shown in the FIS report.

Logical_Consistency_Report:

When FEMA revises an FIS, adjacent studies are checked to ensure agreement between flood elevations at the boundaries. Likewise flood elevations at the confluence of streams studied independently are checked to ensure agreement at the confluence. The FIRM and the FIS are developed together and care is taken to ensure that the elevations and other features shown on the flood profiles in the FIS agree with the information shown on the FIRM. However, the elevations as shown on the FIRM may represent rounded whole-foot elevations. They must be shown so that a profile recreated from the elevations on the FIRM will match the FIS profiles within one half of one foot.

Completeness_Report:

Data contained in the NFHL reflects 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 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. Generally, regulatory water surface elevations and/or regulatory floodways are published only for developed or developing areas of communities. For areas where little or no development is expected to occur, FEMA may generate flood risk data without published water surface elevations. Typically, only drainage areas that are greater than one square mile and with an average of one foot of flood depth or greater are studied. Note: The NFHL reflects the most current information available when the distribution data set was created. Currently, not all areas of a State or Territory have effective FIRM Database data. As a result, users may need to refer to the effective FIRM for effective flood hazard information.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The NFHL consists of vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and FIRM Database 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 Standards for Flood Risk Analysis and Mapping. Horizontal 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 the individual FIRM Database components of the NFHL was also performed.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

The NFHL consists of vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and FIRM Database 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 Standards for Flood Risk Analysis and Mapping. The reliability of the floodplain boundary delineation is quantified by comparing the computed flood elevation to the ground elevation at the mapped floodplain boundary. The tolerance for how precisely the flood elevation and the ground elevation must match varies based on the flood risk class, which is a function of population, population density, and/or anticipated growth in floodplain areas. A horizontal accuracy of +/- 38 feet is used to determine the compliance with the vertical tolerances defined for each risk class. The range of differences between the ground elevation (defined from the topographic data used for the Flood Risk Project) and the computed flood elevation is between +/- 1.0 foot at the 95% confidence interval for areas with high population within the floodplain and/or high anticipated growth and Special Flood Hazard Areas (SFHAs) with high flood risk to +/- one-half the contour interval at the 85% confidence interval for areas with low population and densities within the floodplain and small or no anticipated growth and SFHAs with low flood risk. Independent quality control testing of the individual FIRM Database components of the NFHL was also performed.

Lineage:

Process_Step:

Process_Description:

The NFHL dataset is a compilation of effective FIRM Databases (a collection of the digital data that are used in GIS systems for creating new Flood Insurance Rate Maps) and Letters of Map Change (Letters of Map Amendment and Letters of Map Revision only) that create a seamless GIS data layer for a State or Territory. It is updated on a monthly basis. The FIRM Databases are compiled in conjunction with the hardcopy FIRMs and the final FIS reports. The specifics of the hydrologic and hydraulic analyses performed are detailed in the FIS reports available for each jurisdiction. The results of these studies are submitted in digital format to FEMA. These data and unrevised data from effective FIRMs are compiled onto the base map used for FIRM publication and checked for accuracy and compliance with FEMA standards. As new FIRM Databases are received the individual FIRM layers are sewn into the nationwide layers of the NFHL. LOMRs for the FIRM Databases in the NFHL are cut directly into the NFHL data layers as they are being produced and finalized.

Process_Date:

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method:Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type:GT-polygon composed of chains

Point_and_Vector_Object_Count:4682

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name:NAD 1983 StatePlane Pennsylvania South FIPS 3702 Feet

Lambert_Conformal_Conic:

NAD 1983 StatePlane Pennsylvania South FIPS 3702 Feet

Standard_Parallel:39.93333333333333

Standard_Parallel:40.96666666666667

Longitude_of_Central_Meridian:-77.75

Latitude_of_Projection_Origin:39.33333333333334

False_Easting:1968500.0

False_Northing:0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method:coordinate pair

Coordinate_Representation:

Abscissa_Resolution:0.000000026907964745248598

Ordinate_Resolution:0.000000026907964745248598

Planar_Distance_Units:foot_us

Geodetic_Model:

Horizontal_Datum_Name:D North American 1983

Ellipsoid_Name:GRS 1980

Semi-major_Axis:6378137.0

Denominator_of_Flattening_Ratio:298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label:YorkCounty_HYDRO_Floodplains201812

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:DFIRM_ID

Attribute:

Attribute_Label:VERSION_ID

Attribute:

Attribute_Label:FLD_AR_ID

Attribute:

Attribute_Label:STUDY_TYP

Attribute:

Attribute_Label:FLD_ZONE

Attribute:

Attribute_Label:ZONE_SUBTY

Attribute:

Attribute_Label:SFHA_TF

Attribute:

Attribute_Label:STATIC_BFE

Attribute:

Attribute_Label:V_DATUM

Attribute:

Attribute_Label:DEPTH

Attribute:

Attribute_Label:LEN_UNIT

Attribute:

Attribute_Label:VELOCITY

Attribute:

Attribute_Label:VEL_UNIT

Attribute:

Attribute_Label:AR_REVERT

Attribute:

Attribute_Label:AR_SUBTRV

Attribute:

Attribute_Label:BFE_REVERT

Attribute:

Attribute_Label:DEP_REVERT

Attribute:

Attribute_Label:DUAL_ZONE

Attribute:

Attribute_Label:SOURCE_CIT

Attribute:

Attribute_Label:Shape

Attribute_Definition:

Feature geometry.

Attribute_Definition_Source:

Esri

Attribute_Domain_Values:

Unrepresentable_Domain:

Coordinates defining the features.

Attribute:

Attribute_Label:Shape_Leng

Attribute:

Attribute_Label:Shape_Area

Attribute_Definition:

Area of feature in internal units squared.

Attribute_Definition_Source:

Esri

Attribute_Domain_Values:

Unrepresentable_Domain:

Positive real numbers that are automatically generated.

Overview_Description:

Entity_and_Attribute_Overview:

The NFHL 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.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:FEMA, Flood Map Service Center

Contact_Address:

Address_Type:mailing

Address:

P.O. Box 3617

City:Oakton

State_or_Province:Virginia

Postal_Code:22124

Country:US

Contact_Voice_Telephone:1-877-336-2627

Contact_Electronic_Mail_Address:FEMAMapSpecialist@riskmapcds.com

Contact Instructions:

Data requests must include the name and FIPS code of each State or Territory covered by the request, along with an MSC account number if applicable.

Distribution_Liability:

No warranty expressed or implied is made by FEMA 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:NFHL Interactive Map (FEMA GeoPlatform)

Format_Information_Content:

This is an online mapping resource for the National Flood Hazard Layer.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://www.fema.gov/media-library-data/1449862521789-e97ed4c7b7405faa7c3691603137ec40/FIRM_Database_Technical_Reference_Nov_2015.pdf

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://fema.maps.arcgis.com/home/item.html?id=cbe088e7c8704464aa0fc34eb99e7f30

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://msc.fema.gov

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://www.fema.gov/media-library/assets/documents/13424

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://content.femadata.com/FIMA/Risk_MAP/NFHL/

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://www.floodmaps.fema.gov/NFHL/status.shtml

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://hazards.fema.gov/femaportal/wps/portal/NFHLWMS

Fees:Contact Distributor

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Pennsylvania Spatial Data Access (PASDA)

Contact_Address:

Address_Type:mailing and physical 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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name:File Geodatabase Feature Class

Transfer_Size:26.893

Metadata_Reference_Information:

Metadata_Date:20181217

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Federal Emergency Management Agency

Contact_Person:Flood Map Service Center

Contact_Address:

Address_Type:mailing

Address:

500 C Street, S.W.

City:Washington

State_or_Province:District of Columbia

Postal_Code:20472

Country:US

Contact_Voice_Telephone:1-877-336-2627

Contact_Electronic_Mail_Address:FEMAMapSpecialist@riskmapcds.com

Metadata_Standard_Name:FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version:FGDC-STD-001-1998

Metadata_Time_Convention:local time