NOAA Office for Coastal Management Coastal Inundation Digital Elevation Model: South Ca...

Title:	NOAA Office for Coastal Management Coastal Inundation Digital Elevation Model: South Carolina North
Short Name:	SC North DEM FY20 Update
Status:	Completed
Publication Date:	2020-07
Abstract:	These data were created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer called the Sea Level Rise and Coastal Flooding Impacts Viewer. It depicts potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The Sea Level Rise and Coastal Flooding Impacts Viewer may be accessed at: https://coast.noaa.gov/slr. This metadata record describes the South Carolina North digital elevation model (DEM), which is a part of a series of DEMs produced for the National Oceanic and Atmospheric Administration Office for Coastal Management's Sea Level Rise and Coastal Flooding Impacts Viewer described above. This DEM includes the best available lidar known to exist at the time of DEM creation that met project specifications. This DEM includes data for Georgetown, WIlliamsburg, Horry, Florence and Marion Counties. The DEM was produced from the following lidar data sets: 1. 2017 SC DNR Lidar DEM: Georgetown County, SC 2. 2017 SC DNR Lidar DEM: Williamsburg County, SC 3. 2014 SC DNR Lidar DEM: Horry County, SC 4. 2007 SC DNR Lidar DEM: Florence County, SC 5. 2007 SC DNR Lidar DEM: Marion County, SC The DEM is referenced vertically to the North American Vertical Datum of 1988 (NAVD88, Geoid12B) with vertical units of meters and horizontally to the North American Datum of 1983 (NAD83). The resolution of the DEM is approximately 3 meters.
Purpose:	The NOAA Office for Coastal Management has developed high-resolution digital elevation models (DEMs) for use in the Office's Sea Level Rise and Coastal Flooding Impacts internet mapping application. These DEMs serve as source datasets used to derive data to visualize the impacts of inundation resulting from sea level rise along the coastal United States and its territories.
Notes:	10911
Supplemental Information:	Source data and their associated metadata are available at the following URLs: 1. 2017 SC DNR Lidar DEM, Georgetown County, SC Metadata: https://www.fisheries.noaa.gov/inport/item/57134 Data Download: https://coast.noaa.gov/htdata/raster2/elevation/SC_Georgetown_DEM_2017_8796/ 2. 2017 SC DNR Lidar DEM Williamsburg County, SC Metadata: https://www.fisheries.noaa.gov/inport/item/57112 Data Download: https://coast.noaa.gov/htdata/raster2/elevation/SC_Coast_Counties_DEM_2017_8790/ 3. 2014 SC DNR Lidar DEM Horry County, SC Metadata: https://www.fisheries.noaa.gov/inport/item/48216 Data Download: https://coast.noaa.gov/htdata/lidar1_z/geoid12b/data/4814 4. 2007 SC DNR Lidar DEM Florence County, SC Metadata: https://www.fisheries.noaa.gov/inport/item/49979 Data Download: https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/4886 5. 2007 SC DNR Lidar DEM, Marion County, SC Metadata: https://www.fisheries.noaa.gov/inport/item/49971 Data Download: https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/507/

Keywords

Theme Keywords

Theme Keywords
Thesaurus	Keyword
Global Change Master Directory (GCMD) Science Keywords	EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL PROCESSES > FLOODING
Global Change Master Directory (GCMD) Science Keywords	EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL PROCESSES > SEA LEVEL CHANGES
Global Change Master Directory (GCMD) Science Keywords	EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM)
ISO 19115 Topic Category	elevation
UNCONTROLLED
None	Bathymetry/Topography
None	DEM
None	Digital Elevation Model
None	elevation
None	flooding
None	inundation
None	lidar
None	sea level rise
None	topography

Spatial Keywords

Spatial Keywords
Thesaurus	Keyword
Global Change Master Directory (GCMD) Location Keywords	CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > SOUTH CAROLINA
UNCONTROLLED
None	Florence County
None	Georgetown County
None	Horry County
None	Marion County
None	Williamsburg County

Physical Location

Organization:	Office for Coastal Management
City:	Charleston
State/Province:	SC

Data Set Information

Data Set Scope Code:	Data Set
Maintenance Frequency:	None Planned
Data Presentation Form:	Image (digital)
Distribution Liability:	Any conclusions drawn from the analysis of this information are not the responsibility of the NOAA Office for Coastal Management or its partners.
Data Set Credit:	Acknowledgment of the NOAA Office for Coastal Management as a data source would be appreciated in products developed from these data, and such acknowledgment, as is standard for citation and legal practices for data source, is expected.

Support Roles

Distributor

CC ID: 912163

Date Effective From:	2020-07
Date Effective To:
Contact (Organization):	NOAA Office for Coastal Management (NOAA/OCM)
Address:	2234 South Hobson Ave Charleston, SC 29405-2413
Email Address:	coastal.info@noaa.gov
Phone:	(843) 740-1202
URL:	https://coast.noaa.gov

Metadata Contact

CC ID: 912164

Date Effective From:	2020-07
Date Effective To:
Contact (Organization):	NOAA Office for Coastal Management (NOAA/OCM)
Address:	2234 South Hobson Ave Charleston, SC 29405-2413
Email Address:	coastal.info@noaa.gov
Phone:	(843) 740-1202
URL:	https://coast.noaa.gov

Point of Contact

CC ID: 912162

Date Effective From:	2020-07
Date Effective To:
Contact (Organization):	NOAA Office for Coastal Management (NOAA/OCM)
Address:	2234 South Hobson Ave Charleston, SC 29405-2413
Email Address:	coastal.info@noaa.gov
Phone:	(843) 740-1202
URL:	https://coast.noaa.gov

Extents

Currentness Reference:	Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 912180

W° Bound:	-80.13555
E° Bound:	-78.47926
N° Bound:	34.32152
S° Bound:	33.10045

Extent Group 1 / Time Frame 1

CC ID: 912179

Time Frame Type:	Range
Start:	2007
End:	2017

Spatial Information

Spatial Representation

Representations Used

Grid:	Yes

Grid Representation 1

CC ID: 912171

Dimension Count:

3

Cell Geometry:

Area

Transformation Parameters Available?:

No

Axis Dimension 1

Dimension Type:	Row
Size:	46739

Axis Dimension 2

Dimension Type:	Column
Size:	59540

Axis Dimension 3

Dimension Type:	Vertical
Size:	1

Reference Systems

Reference System 1

CC ID: 912175

Coordinate Reference System

CRS Type:

Geographic 2D

EPSG Code:

EPSG:4269

EPSG Name:

NAD83

▾ See Full Coordinate Reference System Information

Horizontal Resolution

Horizontal Encoding Method:	Latitude and Longitude
Latitude Resolution:	2.7E-5
Longitude Resolution:	2.7E-5
Horizontal Units:	Decimal Degrees

Vertical Resolution

Vertical Encoding Method:	Explicit Coordinate
Vertical Resolution:	0.001
Vertical Units:	Meters

Access Information

Security Class:	Unclassified
Data Access Constraints:	None
Data Use Constraints:	The dataset is provided as is, without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes.

URLs

URL 1

CC ID: 912165

URL:	https://coast.noaa.gov/slr
URL Type:	Online Resource

URL 2

CC ID: 912166

URL:	https://coast.noaa.gov/digitalcoast/tools/slr
URL Type:	Online Resource

URL 3

CC ID: 912167

URL:	https://coast.noaa.gov/slrdata
URL Type:	Online Resource

URL 4

CC ID: 912168

URL:	https://coast.noaa.gov
URL Type:	Online Resource

Data Quality

Horizontal Positional Accuracy:	The DEM is derived from the source lidar data. Horizontal accuracy testing is not performed on the DEM. Lidar source data assumed to meet 1 meter horizontal accuracy.
Vertical Positional Accuracy:	The DEM is derived from the source lidar data. Vertical accuracy is not tested on the DEM. Project specifications require all source lidar data used in constructing the DEM to meet FEMA Specifications for Flood Hazard Mapping.
Completeness Report:	A visual qualitative check was performed to ensure data completeness. All available lidar data known at the time of DEM creation that meets project specifications has been used to develop the DEM. Known data gaps may exist where lidar coverage was incomplete.
Conceptual Consistency:	Data covers the tile scheme provided for the project area. Elevation data checked for anomalous elevation values outside expected range.

Lineage

Process Steps

Process Step 1

CC ID: 912176

Description:	The source elevation datasets listed above were identified, downloaded, edited, and finalized.
Process Date/Time:	2020-03-01 00:00:00

Process Step 2

CC ID: 912177

Description:	Source elevation data and their associated hydro-breaklines, where available, were downloaded. Data were then reviewed and edited to meet the project's requirements. The major requirements were delineating streams 10m or greater in width, removing bridges over streams greater than 10m wide, flattening inland water bodies, and converting data referenced to an older geoid to the current geoid, Geoid 12B. NOAA's VDatum datum conversion tool was used to convert geoids. Ocean-connected water areas were removed from data prior to final mosaicking. Data were then mosaicked together based on date, with the most recent data taking priority. Ocean-connected water areas were given a value of -99 to standardize this area's value across sources, to flatten water for mapping, and to make it easy for users to remove ocean-connected water if desired.
Process Date/Time:	2020-03-01 00:00:00

Description:

Source elevation data and their associated hydro-breaklines, where available, were downloaded. Data were then reviewed and edited to meet the project's requirements. The major requirements were delineating streams 10m or greater in width, removing bridges over streams greater than 10m wide, flattening inland water bodies, and converting data referenced to an older geoid to the current geoid, Geoid 12B. NOAA's VDatum datum conversion tool was used to convert geoids. Ocean-connected water areas were removed from data prior to final mosaicking. Data were then mosaicked together based on date, with the most recent data taking priority. Ocean-connected water areas were given a value of -99 to standardize this area's value across sources, to flatten water for mapping, and to make it easy for users to remove ocean-connected water if desired.

Process Date/Time:

2020-03-01 00:00:00

Catalog Details

Catalog Item ID:	60076
GUID:	gov.noaa.nmfs.inport:60076
Metadata Record Created By:	William Brooks
Metadata Record Created:	2020-06-18 16:02+0000
Metadata Record Last Modified By:	SysAdmin InPortAdmin
Metadata Record Last Modified:	2023-05-30 18:09+0000
Metadata Record Published:	2020-06-29
Owner Org:	OCM
Metadata Publication Status:	Published Externally
Do Not Publish?:	N
Metadata Last Review Date:	2020-06-29
Metadata Review Frequency:	1 Year
Metadata Next Review Date:	2021-06-29

Item Identification