onemap_prod.SDEADMIN.hss93s

Title: onemap_prod.SDEADMIN.hss93s

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.

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.

system filename: 1.164 MB   Beaufort
                  .788 MB   Bertie
                 2.317 MB   Brunswick
                  .251 MB   Camden
                 1.695 MB   Carteret
                  .613 MB   Chowan
                 1.778 MB   Craven
                  .704 MB   Currituck
                  .854 MB   Dare
                  .422 MB   Gates
                  .544 MB   Hertford
                  .372 MB   Hyde
                  .532 MB   Jones
                 1.142 MB   New Hanover
                 6.690 MB   Onslow
                  .476 MB   Pamlico
                  .281 MB   Pasquotank
                  .708 MB   Pender
                  .973 MB   Perquimans
                   .92 MB   Tyrrell
                  .326 MB   Washington


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
<countyabbrev>hss93f399, 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.

Range of values
Minimum:	Variable by county tile
Maximum:	Variable by county tile
Units:	meters
Resolution:	0.001

Range of values

Minimum:

Variable by county tile

Maximum:

Variable by county tile

Units:

meters

Resolution:

0.001

Value	Definition
0	Land not inundated
12	Land inundated by category 1 or 2 hurricanes, or greater
3	Land inundated by category 3 hurricane, or greater
45	Land inundated by category 4 or 5 hurricanes

Value

Definition

Land not inundated

Land inundated by category 1 or 2 hurricanes, or greater

Land inundated by category 3 hurricane, or greater

Land inundated by category 4 or 5 hurricanes

HSS93S.PAT Polygon Attribute Table ITEM NAME WIDTH OUTPUT TYPE DEC DESCRIPTION AREA 4 12 F 3 Total area in meters PERIMETER 4 12 F 3 Total perimeter in meters HSS93S# 4 5 B - Poly internal id number HSS93S-ID 4 5 B - Poly user id number SURGE 4 5 B - Hurricane surge inundation limit number

National Hurricane Center Director, Bob Sheets National Hurricane Staff, Brian Jarvinen Coral Gables, Florida NCCGIA Director Database Administration, Zsolt Nagy Database Management, Ken Shaffer Project Manager, David Giordano North Carolina Center for Geographic Information and Analysis Governor's Office Office of State Planning 301 North Wilmington Street, Suite 700 Raleigh, NC 27601-2825

onemap_prod.SDEADMIN.hss93s

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