North Carolina Floodplain Mapping Program, North Carolina Division of Emergency Management 200602 stokes_vector.STOKES.flood_zones vector digital data Raleigh, NC North Carolina Floodplain Mapping Program, North Carolina Division of Emergency Management withheld stokes_vector.STOKES.flood_zones MapFldHazAr is a GIS shapefile representing the area within the flood mapping boundaries defined by the engineering models for the 100 year, 500 year and floodway. The MapFldHazAr spatial table contains information about the flood hazard within the study area. These zones are used by FEMA to designate the Special Flood Hazard Area (SFHA), identify areas of coastal high hazard flooding, and for insurance rating purposes. These data are the flood hazard areas that are or will be depicted on the FIRM. These data were collected and derived by the North Carolina Floodplain Mapping Program (www.ncfloodmaps.com) as part of its effort to modernize FEMA Flood Insurance Rate Maps (FIRM) statewide. The North Carolina Floodplain Mapping Program was established through a Cooperating Technical State (CTS) agreement with FEMA in response to the extensive damage caused by Hurricane Floyd in 1999. en 200602 publication date Complete As needed -80.454963 -80.024406 36.554148 36.253161 1572571.749829 1697953.625146 914180.249842 1022210.375126 None Map Flood Hazard Area Floodplain Boundaries 100 Year Flood 500 Year Flood 1% annual chance flood hazard 0.2% annual chance flood hazard DFIRM Digital Flood Insurance Rate Map FIRM Flood Insurance Rate Map Floodway Riverine flooding Special Flood Hazard Area Coastal flooding North Carolina Atlas & Gazetteer (Yarmouth, Maine: DeLorme, 2001). Stokes County, Brook Cove, Dalton, Danbury, Fulp, Germanton, Hartman, Harts Store, King, Lawsonville, Meadow, Perch, Pine Hall, Pinnacle, Sandy Ridge, Shoal, Walnut Cove, North Carolina None These data were created with the highest consideration of accuracy and data integrity. However, as with all other geospatial datasets, users must take into consideration the consequences of using the data for specific applications, business processes, decisions, and map display. For example, surface conditions may have changed in some areas since the initial data was captured. A full metadata record is provided to help the user understand the date, map scale and accuracy standard applied in the collection and data development process. The data should not be used without full review and comprehension of the metadata. Acknowledgement of the North Carolina Floodplain Mapping Program is appreciated when using the data set. Data further derived from this data set should be fully documented using the federal metadata standard and listed via the NC Geospatial Data Clearinghouse. Greenhorne & O'Mara James Huffines mailing and physical address
5565 Centerview Drive, Suite 107
Raleigh NC 27606 919-532-2332 919-851-8393 ESRI ArcCatalog 9.2.2.1350 Federal Emergency Management Agency Unknown Unknown Flood Insurance Study, STOKES COUNTY, NC document Washington, DC FEMA withheld Federal Emergency Management Agency Unknown Unknown Flood Insurance Study, STOKES COUNTY, NC raster digital data Washington, DC FEMA withheld Federal Emergency Management Agency Unknown Unknown Flood Insurance Study, STOKES COUNTY, NC map Washington, DC FEMA withheld Feature Class None None Watershed Concepts 200506 MapFldHazAr Shapefile 200506 publication date MapFldHazAr For streams restudied by detailed and limited detail methods, the 1% and 0.2% annual chance floodplains were delineated using flood elevations determined at each cross section. Between cross sections, the boundaries were interpolated using topographic data acquired using airborne LIDAR. This LIDAR data was acquired during the winter 2000-2001 flying season. The topographic data satisfies a vertical root-mean-square error (RMSE) accuracy standard of 20cm (1.3 feet accuracy at the 95% confidence limit) for the Outer Banks and 25 cm (1.6 feet accuracy at the 95% confidence limit) for those portions of the basin lying west of the Outer Banks. These data could be contoured at roughly a 2-foot vertical contour interval. All elevations were referenced to the NAVD 88 and reflect orthometric heights. Variably spaced, bare-earth digital topographic data in ASCII point file format were combined with imagery (either flown concurrently with the LIDAR data or using existing digital orthophotos) to establish a Triangulated Irregular Network (TIN) of digital elevation points, which include selected breaklines to be used for hydraulic modeling. The 1% annual chance floodplain boundary corresponds to the boundary of the areas of special flood hazards (Zones VE, AO, AH, A99, AR, A, and AE), and the 0.2% annual chance floodplain boundary corresponds to the boundary of areas of moderate flood hazards. In cases where the 1% and 0.2% annual chance floodplain boundaries are close together, only the 1% annual chance floodplain boundaries have been shown. The floodways were computed for certain stream segments on the basis of equal conveyance reduction from each side of the floodplain. Floodway widths were computed at cross sections. Between cross sections, the floodway boundaries were interpolated. The computed floodway is shown on the FIRM. In cases where the floodway and 1% annual chance floodplain boundaries are either close together or collinear, only the floodway boundary is shown. For streams restudied by detailed and limited detail methods, the 1% and 0.2% annual chance floodplains were delineated using flood elevations determined at each cross section. Between cross sections, the boundaries were interpolated using topographic data acquired using airborne LIDAR. This LIDAR data was acquired during the winter 2000-2001 flying season. The topographic data satisfies a vertical root-mean-square error (RMSE) accuracy standard of 20cm (1.3 feet accuracy at the 95% confidence limit) for the Outer Banks and 25 cm (1.6 feet accuracy at the 95% confidence limit) for those portions of the basin lying west of the Outer Banks. These data could be contoured at roughly a 2-foot vertical contour interval. All elevations were referenced to the NAVD 88 and reflect orthometric heights. Variably spaced, bare-earth digital topographic data in ASCII point file format were combined with imagery (either flown concurrently with the LIDAR data or using existing digital orthophotos) to establish a Triangulated Irregular Network (TIN) of digital elevation points, which include selected breaklines to be used for hydraulic modeling. Furthermore, a uniformly spaced sampling of the TIN resulted in uniformly spaced Digital Elevation Models (DEMs), with 20 ft x 20 ft post spacing, which was generated in multiple file formats. The 1% annual chance floodplain boundary corresponds to the boundary of the areas of special flood hazards (Zones VE, AO, AH, A99, AR, A, and AE), and the 0.2% annual chance floodplain boundary corresponds to the boundary of areas of moderate flood hazards. In cases where the 1% and 0.2% annual chance floodplain boundaries are close together, only the 1% annual chance floodplain boundaries have been shown. The floodways were computed for certain stream segments on the basis of equal conveyance reduction from each side of the floodplain. Floodway widths were computed at cross sections. Between cross sections, the floodway boundaries were interpolated. The computed floodway is shown on the FIRM. In cases where the floodway and 1% annual chance floodplain boundaries are either close together or collinear, only the floodway boundary is shown. Unknown Metadata imported. withheld 20061221 Dataset copied. withheld 20070926 Vector Simple FALSE 0 TRUE FALSE coordinate pair 0.000651 0.000651 survey feet North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983 NAD_1983_StatePlane_North_Carolina_FIPS_3200_Feet Explicit elevation coordinate included with horizontal coordinates 1.000000 VERNO Generated during data loading, state determines versioning. A single VerNo may include records with different VerDates NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) 0 Generated during data loading, state determines versioning. A single VerNo may include records with different VerDates NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) SmallInteger 2 VERNO 0 0 flood_zones Polygon Geometry file that is the physical representation of the Flood Mapping Boundaries that are calculated from the Engineering Models NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) Feature Class 0 Shape Feature geometry. ESRI Polygon Polygons represent area features and are made up of arcs which define the boundary. ESRI Coordinates defining the features. Shape Geometry 0 0 0 FLOODARID Primary key. Defined by mapping contractor using the formula: STFIPS + COFIPS + DATE + SEQUENTIAL NUMBER (where DATE=YYYYMMDD) NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) 37157200506171 371572005061778 String 25 FLOODARID 0 0 METAID Foreign key, link to Metadata table should be the same as for the flood hazard lines NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) 9999 Temporary value Watershed Concepts String 25 METAID 0 0 FLOODZONE FIRM zone designation NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) D_FldZn NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) String 55 FLOODZONE 0 0 ARREVERT If Zone AR, what zone it reverts to. Only populated if Zone = AR (currently only in California) NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) Null If Zone AR, what zone it reverts to. Only populated if Zone = AR (currently only in California) NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) String 6 ARREVERT 0 0 SFHATF 1 for zones A, AE, AO, AH, AR, A99, V, VE, 1pct in channel, 1pct in culvert. 0 for X, 0.2pct in channel, 0.2pct in culvert, D, Area not included, X levee, 1pct future conditions NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) True or False True for zones A, AE, AO, AH, AR, A99, V, VE, 1pct in channel, 1pct in culvert. False for X, 0.2pct in channel, 0.2pct in culvert, D, Area not included, X levee, 1pct future conditions NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) SmallInteger 2 SFHATF 0 0 STATICBFE Static Base Flood Elevation value. For areas of constant base flood elevation (usually lakes and coastal zones), the BFE is shown beneath the zone label rather than on a BFE line. For these areas, the BFE value from the FIRM should be entered. NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) 9999 No static elevation Watershed Concepts Double 8 STATICBFE 0 0 DEPTH Depth value. For AO zones, shown beneath the zone label on the FIRM. Usually a whole number between 1 - 3 feet. NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) 9999 No depth Watershed Concepts Double 8 DEPTH 0 0 VEL Velocity. For Alluvial Fan areas, (some AO zones), shown beneath the zone label NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) 9999 No Velocity value Watershed Concepts Double 8 VEL 0 0 VELUNITS Velocity units for Alluvial Fans and other OA zones NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) Null Velocity units for Alluvial Fans and other AO zones NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) String 50 VELUNITS 0 0 VERDATE Data creation date; contractor enters this date NC-FMIS Database Design Review and Physical Model (State of North Carolina, North Carolina Floodplain Mapping Program, September 2002) 20050617 Creation date Watershed Concepts Date 8 VERDATE 0 0 OBJECTID OBJECTID OID 4 0 0 Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape_Length Shape_Length Double 8 0 0 Length of feature in internal units. Esri Positive real numbers that are automatically generated. Shape_Area Shape_Area Double 8 0 0 Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. North Carolina Center for Geographic Information and Analysis Production Services mailing and physical address
301 N. Wilmington Street, Suite 700
Raleigh NC 27601-2825 USA (919) 733-2090 (919) 715-0725 dataq@ncmail.net 8:30 AM to 5:30 PM EST Phone and email preferred. For current price information visit www.cgia.state.nc.us/cost.html Downloadable Data NCCGIA is charged with the development and maintenance of the State's corporate geographic database and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information about the state. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop the corporate database may be reflected in the data supplied. The client must be aware of data conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. NCCGIA does not support secondary distribution of this data. The use of trade names or commercial products does not constitute their endorsement by the NCCGIA or North Carolina State Government. ASCII polygon dataset and metadata PC-based PKZip compatible products (WinZip, unzip) may be used to decompress the dataset. 2.0-4.0 MB 11.590 withheld For current price information visit www.cgia.state.nc.us/cost.html Custom data creation and analysis work is available by contract. Contact Production Services at (919) 733-2090. Data are supplied in ArcInfo and ASCII formats. Format compatibility is the user's responsibility. For more information visit www.cgia.state.nc.us/cost.html. 20070926 Greenhorne & O'Mara Kristel Whitson GIS Technician mailing and physical address
5565 Centerview Drive, Suite 107
Raleigh NC 27606 919-532-2331 919-851-8393 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile en 20200602 12564100 FALSE 20200605 15444900 20200605 15444900 flood_zones 002 Projected GCS_North_American_1983 Linear Unit: Foot_US (0.304801) NAD_1983_StatePlane_North_Carolina_FIPS_3200_Feet <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.7'><WKT>PROJCS[&quot;NAD_1983_StatePlane_North_Carolina_FIPS_3200_Feet&quot;,GEOGCS[&quot;GCS_North_American_1983&quot;,DATUM[&quot;D_North_American_1983&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Lambert_Conformal_Conic&quot;],PARAMETER[&quot;False_Easting&quot;,2000000.002616666],PARAMETER[&quot;False_Northing&quot;,0.0],PARAMETER[&quot;Central_Meridian&quot;,-79.0],PARAMETER[&quot;Standard_Parallel_1&quot;,34.33333333333334],PARAMETER[&quot;Standard_Parallel_2&quot;,36.16666666666666],PARAMETER[&quot;Latitude_Of_Origin&quot;,33.75],UNIT[&quot;Foot_US&quot;,0.3048006096012192],AUTHORITY[&quot;EPSG&quot;,2264]]</WKT><XOrigin>-121841900</XOrigin><YOrigin>-93659000</YOrigin><XYScale>1536</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.020833333333333332</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102719</WKID><LatestWKID>2264</LatestWKID></ProjectedCoordinateSystem> 1.0 Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595 flood_zones 1572571.749829 1697953.625146 1022210.375126 914180.249842 1 -80.454963 -80.024406 36.554148 36.253161 1 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset 002 withheld Local Area Network 11.590 Feature Class File Geodatabase Feature Class NAD_1983_StatePlane_North_Carolina_FIPS_3200_Feet EPSG 6.12(9.0.0) 0 20200605