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Hurricane Storm Surge Areas - "Slow" Moving Storms


Download Link: http://data.nconemap.gov/downloads/vector/hss93s.zip
Abstract: The National Hurricane Center, in cooperation with the North Carolina Center for Geographic Information and Analysis, developed the GIS data set, Hurricane Storm Surge Inundation Areas (1993), to reevaluate the extent of the areas affected by hurricane inundation along the North Carolina coast. The data depicts the extent of hurricane storm surge inundation areas based on SLOSH (Sea, Lake, and Overland Surges from Hurricanes) models, for the North Carolina coast. This is the metadata for the SLOW model (with forward velocities of less than or equal to 15mph). Storm surge is the abnormal rise in water level caused by wind and pressure forces of a hurricane or tropical storm. The SLOSH model was developed using various combinations of hurricane strength (based on the Saffir-Simpson scale), wind speed, and direction of movement. Rainfall produced by a hurricane is not taken into account. This data is stored in a county library by county extent.
Purpose: This data was created to assist governmental agencies and others in making resource management decisions through use of a Geographic Information System (GIS).
Supplemental Information: There are several county-based coverages associated with this data layer. The county names below show inundation limit file sizes for the 'slow' hurricanes (with forward velocities of less than or equal to 15mph). There are coverages depicting inundation limits for the 'fast' hurricanes (those with forward velocities greater than 15mph) as well. Revisions and updates to this layer include: 6.) filenames: (countyabbrev)hss93s999, one metadata file. Sept. 3, 1999: Updated one polygon coding error for surge value in Dare County. 5.) directory: hss93_799 filenames: (countyabbrev)hss93s799 (countyabbrev)hss93f799 July 21, 1999 update includes surge updates for the following counties: Carteret and Onslow. Detailed description of changes: Carteret hss93s-id = 7 had surge update: '0' to '12'. Onslow hss93s-id = 194 had surge update: '0' to '3' and hss93s-id = 110 had surge update: '0' to '12'. 4.) directory: (coabbrev)hss93_399 filenames: (coabbrev)hss93s399 countyabbrevhss93f399, two compliant metadata files. March 3, 1999 update includes addition of storm surge data for the following counties: Beaufort, Bertie, Camden, Carteret, Chowan, Craven, Currituck, Dare, Gates, Hertford, Hyde, Jones, Pamlico, Pasquotank, Perquimans, Tyrrell, and Washington. 3.) directory: hss93_1298 filename: hss93f1298 and hss93s1298. There are 2 compliant metadata files. The December 1998 update to this layer consisted of projecting the data from NAD27 datum, State Plane projection, units of measure feet TO: NAD83 DATUM, State Plane PROJECTION, UNITS OF MEASURE METERS. This was done to comply with the NC Geographic Information Coordinating Council's "Statement of Direction for North Carolina Corporate Geographic Database Horizontal Reference, Datum and Unit of Measure". This reprojecting was done in various ways depending on the data type and content. Vector data was projected using the 'project' command in ESRI's Arc software and topology was cleaned and built based on coverage needs. Raster data was projected using ESRI's Grid module and various steps as applicable. 2.) directory: hss93_295 filenames: hss93f295 and hss93s295 Represent the February 9, 1995 versions with 2 compliant metadata files. The update consisted of the deletion of duplicate label points in both coverages. These files were previously archived under the following names but did not have compliant metadata. filename: hss93f.295 hss93s.295 1.) directory: hss93_994 filenames: nchss93f994 nchss93s994 September, 1994 was the original release date for these coverages. Non-compliant metadata is in the info directory.
Publication Date: 19990903
Originator: NC Dept. of Information Technology, Government Data Analytics Center, Center for Geographic Information and Analysis
Publisher: National Hurricane Center
Online Linkage: http://www.nconemap.gov
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 19940912
Ending Date: 19990903
Currentness Reference: Digital data creation and revision dates
Status:
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -78.579105
East Bounding Coordinate: -75.417789
North Bounding Coordinate: 36.589414
South Bounding Coordinate: 33.788485
Contact Voice Telephone: (305) 229-4462
Grid Coordinate System Name: State Plane Coordinate System 1983
Horizontal Datum Name: North American Datum of 1983
Planar Distance Units: meters
Ellipsoid Name: Geodetic Reference System 80
Attribute:
Attribute Label: PERIMETER
Attribute Definition: Total perimeter in coverage units
Attribute Definition Source: Software computed
Attribute Domain Values:
Range Domain:
Range Domain Minimum: Variable by county tile
Range Domain Maximum: Variable by county tile
Attribute Units of Measure: meters
Attribute Measurement Resolution: 0.001
Attribute Measurement Frequency: None planned
Attribute:
Attribute Label: OBJECTID
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: SURGE
Attribute Definition: Hurricane surge inundation limit number
Attribute Definition Source: National Hurricane Center
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 0
Enumerated Domain Value Definition: Land not inundated
Enumerated Domain Value Definition Source: National Hurricane Center
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 12
Enumerated Domain Value Definition: Land inundated by category 1 or 2 hurricanes, or greater
Enumerated Domain Value Definition Source: National Hurricane Center
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 3
Enumerated Domain Value Definition: Land inundated by category 3 hurricane, or greater
Enumerated Domain Value Definition Source: National Hurricane Center
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: 45
Enumerated Domain Value Definition: Land inundated by category 4 or 5 hurricanes
Enumerated Domain Value Definition Source: National Hurricane Center
Attribute Measurement Frequency: None planned
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 Definition: Area of feature in map units
Attribute Definition Source: Software
Attribute Domain Values:
Unrepresentable Domain: values differ
Distribution Liability: NCCGIA is charged with the development and maintenance of NC OneMap and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop this dataset may be reflected in the data supplied. The user must be aware of possible 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 dataset without its current, compliant metadata record. The use of trade names or commercial products does not constitute their endorsement by NCCGIA or North Carolina State Government.
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