Coastal_Charleston_boundary

Shapefile

Tags
Charleston, October 1-5, elevation, flood, South Carolina, 2015, inland waters, Charleston County, Atlantic Ocean, high-water marks, flooded area, flood-inundation maps, river/stream, geospatial analysis


Summary

This boundary polygon dataset was created to support the development of flood inundation maps for the Federal Emergency Management Agency's (FEMA) response and recovery operations  following an October 1-5, 2015 flood event in the City of Charleston, South Carolina on the Atlantic Ocean.

Description

Heavy rainfall occurred across South Carolina during October 1-5, 2015, as a result of an upper atmospheric low-pressure system that funneled tropical moisture from Hurricane Joaquin into the State. The storm caused major flooding in the central and coastal parts of South Carolina. Almost 27 inches of rain fell near Mount Pleasant in Charleston County during this period. U.S. Geological Survey (USGS) streamgages recorded peaks of record at 17 locations, and 15 other locations had peaks that ranked in the top 5 for the period of record. During the October 2015 flood event, USGS personnel made about 140 streamflow measurements at 86 locations to verify, update, or extend existing rating curves (which are used to compute streamflow from monitored river stage). Immediately after the storm event, USGS personnel documented 602 high-water marks, noting the location and height of the water above land surface. Later in October, 50 additional high-water marks were documented near bridges for South Carolina Department of Transportation. Using a subset of these high-water marks, 20 flood-inundation maps of 12 communities were created. Digital datasets of the inundation area, modeling boundary, and water depth rasters are all available for download.

The study area covers a 2.3 mile coastal reach in the City of Charleston in Charleston County, SC. Twelve high-water marks were used to define the flood extent.

Credits

Use limitations

Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This dataset may be redistributed if it is not edited and is properly referenced. The flood boundaries shown were estimated based on high water marks identified following the flooding event in South Carolina and a digital elevation model. Additional areas may have been flooded and were inaccessable due to hazardous conditions preventing access to flooded areas by the USGS field crews identifying HWMs. Although USGS intends to make this server available 24 hours a day, seven days a week, timely delivery of data and products from this server through the Internet is not guaranteed. The USGS provides these maps "as-is" for a quick reference, emergency planning tool but assumes no legal liability, or responsibility resulting from the use of this information.

Extent

West -79.954998   East -79.922105
North 32.805312   South 32.767871

Scale Range
Maximum (zoomed in) 1:5,000
Minimum (zoomed out) 1:150,000,000

ArcGIS Metadata 

Topics and Keywords 

Themes or categories of the resource  elevation, inlandWaters, boundaries


*Content type  Downloadable Data
Export to FGDC CSDGM XML format as Resource Description No

Place keywords  Charleston, South Carolina, Charleston County, Atlantic Ocean

Temporal keywords  October 1-5, 2015

Theme keywords  boundary, extent, study area, high-water marks, flooded area, flood, geospatial analysis, river/stream, flood inundation maps

Citation 

*Title Coastal_Charleston_boundary
Publication date 2016-02-12 00:00:00


Presentation formats  digital map
FGDC geospatial presentation format  raster digital data


Series
Name Open File Report
Issue 2016-1019

Citation Contacts 

Responsible party
Organization's name U.S. Geological Survey, South Atlantic Water Science Center
Contact's role  originator


Contact information
Phone
Voice 678-924-6700

Address
Type both
Delivery point 1770 Corporate Drive, Suite 500
City Norcross
Administrative area GA
Postal code 30097
Country US



Resource Details 

Dataset languages* English (UNITED STATES)
Dataset character set  utf8 - 8 bit UCS Transfer Format


Status  completed
Spatial representation type* vector


Supplemental information
This boundary extent  was used to extract the final flood-inundation polygon and depth layer from the raster flood-water surface . The raster surface was created with the data points using a Topo to Raster interpolation procedure (http://pro.arcgis.com/en/pro-app/tool-reference/3d-analyst/how-topo-to-rasterworks.htm, accessed November 2015), forming the estimated flood surface. A flood-depth grid was made by subtracting the DEM from the flood surface. This format allows the GIS data to be overlain on maps and aerial photographs, and to be used for various GIS applications, such as FEMA's Hazards U.S. Multi-Hazards (HAZUS-MH) program (Federal Emergency Management Agency, 2010b) to estimate flood damages. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the dataset in nonproprietary form, as well as in ArcGIS format, this metadata file may include some ArcGIS-specific terminology.

*Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.2.2.3552


ArcGIS item properties
*Name Coastal_Charleston_boundary
*Size 0.001
*Location file://\\IGSAYEEWWS134\E\joaquin\publish\ORF2016-1019_DATA\Coastal_Charleston\Coastal_Charleston_boundary.shp
*Access protocol Local Area Network

Extents 

Extent
Description
ground condition

Temporal extent
Beginning date 2015-10-01 00:00:00
Ending date 2015-10-05 00:00:00

Extent
Geographic extent
Bounding rectangle
Extent type  Extent used for searching
*West longitude -79.954998
*East longitude -79.922105
*North latitude 32.805312
*South latitude 32.767871
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude 2321205.925197
*East longitude 2331175.925197
*South latitude 341758.762139
*North latitude 355278.762139
*Extent contains the resource Yes

Resource Points of Contact 

Point of contact
Organization's name U.S. Geological Survey, South Atlantic Water Science Center
Contact's role  point of contact


Contact information
Phone
Voice 678-924-6700

Address
Type both
Delivery point 1770 Corporate Drive, Suite 500
City Norcross
Administrative area GA
Postal code 30097
Country US



Resource Maintenance 

Resource maintenance
Update frequency  not planned


Resource Constraints 

Constraints
Limitations of use

Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This dataset may be redistributed if it is not edited and is properly referenced. The flood boundaries shown were estimated based on high water marks identified following the flooding event in South Carolina and a digital elevation model. Additional areas may have been flooded and were inaccessable due to hazardous conditions preventing access to flooded areas by the USGS field crews identifying HWMs. Although USGS intends to make this server available 24 hours a day, seven days a week, timely delivery of data and products from this server through the Internet is not guaranteed. The USGS provides these maps "as-is" for a quick reference, emergency planning tool but assumes no legal liability, or responsibility resulting from the use of this information.


Legal constraints
Limitations of use
See access and use constraints information.

Other constraints
None. This dataset is provided by USGS as a public service.

Spatial Reference 

ArcGIS coordinate system
*Type Projected
*Geographic coordinate reference GCS_North_American_1983
*Projection NAD_1983_StatePlane_South_Carolina_FIPS_3900_Feet_Intl
*Coordinate reference details
Projected coordinate system
Well-known identifier 2273
X origin -122907600
Y origin -92800700
XY scale 36055449.207017787
Z origin -100000
Z scale 10000
M origin -100000
M scale 10000
XY tolerance 0.0032808398950131233
Z tolerance 0.001
M tolerance 0.001
High precision true
Latest well-known identifier 2273
Well-known text PROJCS["NAD_1983_StatePlane_South_Carolina_FIPS_3900_Feet_Intl",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",2000000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-81.0],PARAMETER["Standard_Parallel_1",32.5],PARAMETER["Standard_Parallel_2",34.83333333333334],PARAMETER["Latitude_Of_Origin",31.83333333333333],UNIT["Foot",0.3048],AUTHORITY["EPSG",2273]]

Reference system identifier
*Value 2273
*Codespace EPSG
*Version 8.2.6


Spatial Data Properties 

Vector
*Level of topology for this dataset  geometry only


Geometric objects
Feature class name Coastal_Charleston_boundary
*Object type  composite
*Object count 1



ArcGIS Feature Class Properties
Feature class name Coastal_Charleston_boundary
*Feature type Simple
*Geometry type Polygon
*Has topology FALSE
*Feature count 1
*Spatial index FALSE
*Linear referencing FALSE



Data Quality 

Scope of quality information
Resource level  dataset


Scope extent
Description
Central and Coastal, South Carolina



Data quality report - Absolute external positional accuracy
Dimension horizontal


Measure description
Horizontal accuracy to the input DEM dataset.



Evaluation method
Horizontal accuracy to the input DEM dataset.

Conformance test results
Test passed Yes




Data quality report - Quantitative attribute accuracy
Evaluation method
Input data for the water-level surface were obtained from the HWMs identified and surveyed in by the USGS following the flooding event and verified with high-resolution imagery.

Conformance test results
Test passed Yes




Distribution 

Distributor
Contact information
Organization's name U.S. Geological Survey, South Atlantic Water Science Center
Contact's role  originator


Contact information
Phone
Voice 678-924-6700

Address
Type both
Delivery point 1770 Corporate Drive, Suite 500
City Norcross
Administrative area GA
Postal code 30097
Country US





Distribution format
*Name Shapefile


Transfer options
*Transfer size 0.001


Online source
Locationhttp://water.usgs.gov/floods/events/2015/Joaquin/data_ofr20161019/
Name Data download location

Fields 

Details for object Coastal_Charleston_boundary 
*Type Feature Class
*Row count 1
Definition
polygon

Definition source
U.S. Geological Survey



Field FID
 
*Alias FID
*Data type OID
*Width 4
*Precision 0
*Scale 0
*Field description
Internal feature number.

*Description source
Esri

*Description of values
Sequential unique whole numbers that are automatically generated.





Field Shape
 
*Alias Shape
*Data type Geometry
*Width 0
*Precision 0
*Scale 0
*Field description
Feature geometry.

*Description source
Esri

*Description of values
Coordinates defining the features.





Field SHAPE_Leng
 
*Alias SHAPE_Leng
*Data type Double
*Width 19
*Precision 0
*Scale 0
Field description
Length of feature

Description source
Esri



Field Shape_Area
 
*Alias SHAPE_Area
*Data type Double
*Width 19
*Precision 0
*Scale 0
*Field description
Area of feature in internal units squared.

*Description source
Esri

*Description of values
Positive real numbers that are automatically generated.







References 

Aggregate Information
Association type  larger work citation


Aggregate resource name
Title Flood-Inundation Maps of Selected Areas Affected by the Flood of October 2015 in Central and Coastal South Carolina
Publication date 2016-02-12 00:00:00


Series
Name Open File Report
Issue 2016-1019

Resource location online
Locationhttp://dx.doi.org/10.3133/ofr20161019



Metadata Details 

Metadata language English (UNITED STATES)
Metadata character set  utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata  dataset
Scope name* dataset


*Last update 2016-02-19


ArcGIS metadata properties
Metadata format ArcGIS 1.0
Metadata style FGDC CSDGM Metadata
Standard or profile used to edit metadata FGDC


Created in ArcGIS for the item 2016-01-11 13:01:26
Last modified in ArcGIS for the item 2016-02-19 16:36:30


Automatic updates
Have been performed Yes
Last update 2016-02-19 16:36:30


Metadata Contacts 

Metadata contact
Organization's name U.S. Geological Survey, South Atlantic Water Science Center
Contact's role  originator


Contact information
Phone
Voice 678-924-6700

Address
Type both
Delivery point 1770 Corporate Drive, Suite 500
City Norcross
Administrative area GA
Postal code 30097
Country US



Metadata Maintenance 

Maintenance
Update frequency  not planned


FGDC Metadata (read-only) 

Entities and Attributes